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Ambrosia trifida L.
GIANT RAGWEED
Great ragweed

Life   Plantae   Dicotyledoneae   Asteraceae   Ambrosia

Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida

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Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida
Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida

Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida
Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida

Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida
Ambrosia trifida
© Copyright Bobby Hattaway 2011 · 5
Ambrosia trifida

Ambrosia trifida, Giant Ragweed
© Copyright Sheryl Pollock 2011 · 5
Ambrosia trifida, Giant Ragweed
Ambrosia trifida, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, whole plant - in flower - general view

Ambrosia trifida, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, inflorescence - whole - unspecified
Ambrosia trifida, inflorescence - lateral view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, inflorescence - lateral view of flower

Ambrosia trifida, leaf - on upper stem
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, leaf - on upper stem
Ambrosia trifida, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, stem - showing leaf bases

Ambrosia trifida, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, whole plant - in flower - general view
Ambrosia trifida, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Ambrosia trifida, whole plant - in flower - general view

Associates · map
FamilyScientific name @ source (records)
Albuginaceae  Albugo tragopogonis @ BPI (5)
Anthocoridae  Orius insidiosus @ MEMU_ENT (1)
Aphididae  Aphis ( @ CSUC_TCN (6)

Prociphilus ( @ NCSU (5)

Rhopalosiphum maidis @ AMNH_PBI (3)

Uroleucon ( @ NCSU (52)
Botryosphaeriaceae  Diplodia @ BPI (1)

Phyllosticta ambrosiae @ BPI (2)
Cicadellidae  Agallia @ MEMU_ENT (1)

Draeculacephala balli @ MEMU_ENT (1)

Empoasca ( @ MEMU_ENT (3)

Graminella nigrifrons @ MEMU_ENT (1)

Graphocephala versuta @ MEMU_ENT (2)

Stirellus bicolor @ MEMU_ENT (1)
Coccinellidae  Coccinella septempunctata @ I_LB (3)

Harmonia axyridis @ I_LB (3)
Dermateaceae  Mollisia atrata @ BPI (5)

Mollisia atrocinerea @ BPI (1)

Phlyctema arcuata @ BPI (5)

Pyrenopeziza atrata @ BPI (2)
Diaporthaceae  Diaporthe arctii @ 615278A (1); BPI (5); 615278C (1); 615278B (1)
Diatrypaceae  Diatrypella herbacea @ BPI (1)
Entylomataceae  Entyloma compositarum @ 174932B (1); 174932A (1); BPI (44)

Entyloma polysporum @ BPI (23); 176272B (1); 176272A (1)
Erysiphaceae  Erysiphe cichoracearum @ BPI (120)

Erysiphe lamprocarpa @ BPI (1)
Flatidae  Metcalfa pruinosa @ AMNH_IZC (1)
Fulgoridae  Poblicia fuliginosa @ UDCC_TCN (1)
Glomerellaceae  Colletotrichum @ BPI (1)
Hyponectriaceae  Physalospora ambrosiae @ BPI (6)
Lophiostomataceae  Lophionema vermisporum @ BPI (1)
Membracidae  Acutalis tartarea @ UDCC_TCN (2); MEMU_ENT (1); AMNH_ENT (2); NCSU (2)

Campylenchia latipes @ UDCC_TCN (1)

Entylia carinata @ NCSU (6); UDCC_TCN (15)

Micrutalis calva @ MEMU_ENT (1)

Publilia concava @ UDCC_TCN (3); NCSU (2)

Publilia modesta @ AMNH_ENT (2)

Stictocephala taurina @ UDCC_TCN (3)
Miridae  Hyaliodes vitripennis @ MEMU_ENT (2)

Ilnacora malina @ AMNH_PBI (4)

Ilnacora stalii @ MEMU_ENT (4)

Lygus lineolaris @ MEMU_ENT (25)

Lygus plagiatus @ MEMU_ENT (9)

Polymerus basalis @ MEMU_ENT (3)

Sixeonotus albicornis @ MEMU_ENT (1)

Slaterocoris breviatus @ MEMU_ENT (2)

Slaterocoris stygicus @ MEMU_ENT (4); AMNH_PBI (14)

Taylorilygus apicalis @ MEMU_ENT (9)
Mycosphaerellaceae  Cercospora arctii-ambrosiae @ BPI (3)

Cercospora ferruginea @ BPI (9)

Cercospora racemosa @ BPI (19); 440242A (1); 440244A (1); 440193A (1); 440242B (1); 440244B (1); 440193B (1)

Cercospora trifidae @ BPI (3)

Mycosphaerella nebulosa @ BPI (1)

Rhabdospora @ BPI (1)

Septoria bacilligera @ BPI (11)
Nidulariaceae  Crucibulum vulgare @ BPI (1)
Pentatomidae  Euschistus @ MEMU_ENT (1)
Peronosporaceae  Peronospora halstedii @ BPI (1)

Plasmopara halstedii @ BPI (39); 188150D (1)
Pezizaceae  Peziza atrata @ BPI (1)
Phaeosphaeriaceae  Leptosphaeria consessa @ BPI (2)

Leptosphaeria dumetorum @ BPI (1)

Leptosphaeria subacuta @ BPI (2)

Ophiobolus acuminatus @ BPI (1)

Ophiobolus anguillides @ BPI (4)

Ophiobolus clavisporus @ BPI (1)

Ophiobolus fulgidus @ 629076A (1); BPI (25); 629076B (1)

Ophiobolus @ BPI (9)

Stagonospora trifidae @ BPI (1)
Phyllachoraceae  Phyllachora ambrosiae @ BPI (4)
Pleomassariaceae  Helminthosporium interseminatum @ BPI (1)
Pleosporaceae  Alternaria cheiranthi @ BPI (1)
Protomycetaceae  Protomyces andinus @ BPI (3)

Protomyces gravidus @ BPI (4)

Protomyces polysporus @ BPI (2)
Psathyrellaceae  Ozonium omnivorum @ BPI (1)
Pucciniaceae  Puccinia canaliculata @ BPI (7)

Puccinia xanthii @ BPI (96)

Uromyces junci @ BPI (1)
Trichiaceae  Perichaena vermicularis @ BPI (1)
Tricholomataceae  Helotium scutula @ BPI (1)
Turritellidae  Vermicularia dematium @ BPI (2)
_  Cicinobolus cesatii @ BPI (3)

Hormiscium ambrosiae @ BPI (3)

Illosporium @ BPI (1)

Ormathodium ambrosiae @ BPI (1)

Stachybotrys atra @ BPI (2)

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Following modified from Delaware Wildflowers
   Top | See original

Delaware Wildflowers  •  Scientific names

Ambrosia trifida L. Giant Ragweed
Asteraceae — Aster family
Native
Ambrosia trifida
Carousel Farm Park
August 2003

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
   Top | See original


Ambrosia trifida L.

Giant Ragweed

Family - Asteraceae

Stems - No info. yet.

Leaves - No info. yet.

Inflorescence - No info. yet.

Flowers - No info. yet.

Flowers close-up.

Flowering - July - September.

Habitat - Low woods, along streams, pond margins, waste ground, roadsides, railroads.

Origin - Native to U.S.

Other info. - A. trifida is found throughout Missouri and is the most abundant member of the genus in this state. It is very prolific and forms huge colonies when left undisturbed.
According to Steyermark there are 2 varieties of A. trifida in Missouri. Variety trifida f. integrifolia (Muhl.) Fern. has leaves which are unlobed, form trifida has typical 3-lobed leaves with a winged petiole. Variety texana Scheele has petioles with no wing.

Photographs taken at the Sunklands Conservation Area, Shannon County, MO., 8-1-04.


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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=AMTR ---> https://plants.usda.gov/java/profile?symbol=AMTR
https://plants.usda.gov/java/profile?symbol=AMTR ---> http://plants.usda.gov/core/profile?symbol=AMTR
http://plants.usda.gov/core/profile?symbol=AMTR ---> https://plants.usda.gov/core/profile?symbol=AMTR
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You are here: Home / Plant Profile

Ambrosia trifida L.
great ragweed

Image of Ambrosia trifida

General Information
Symbol: AMTR
Group: Dicot
Family: Asteraceae
Duration: Annual
Growth Habit : Forb/herb
Subshrub
Native Status : CAN   N
L48   N
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Ambrosia thumbnails at the Plants Gallery

Robert H. Mohlenbrock. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species . Midwest National Technical Center, Lincoln. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United States, DC, Washington. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

©Ted Bodner. James H. Miller and Karl V. Miller. 2005. Forest plants of the southeast and their wildlife uses. University of Georgia Press., Athens. Provided by University of Georgia Press . Scanned by Forestry Images . Usage Requirements .

©Elaine Haug. Provided by Smithsonian Institution, Department of Botany . United States, VA, Woodbridge, Occoquan National Wildlife Refuge. Usage Requirements .

©Jeff McMillian. Provided by Almost Eden . United States, LA. Usage Requirements .

©Robin R. Buckallew. United States, TX, Lewisville. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 341. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team . Usage Requirements .

slideshow

Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Ambrosia L. – ragweed
Species Ambrosia trifida L. – great ragweed

Subordinate Taxa

The Plants Database includes the following 2 subspecies of Ambrosia trifida . Click below on a thumbnail map or name for subspecies profiles. Plant is native (blue) Native Plant is introduced Introduced Plant is introduced Native and Introduced Related taxa legend Distribution of <i>
Ambrosia trifida</i>
L. var. <i>
texana</i>
Scheele
Ambrosia trifida var. texana
Texan great ragweed Distribution of <i>
Ambrosia trifida</i>
L. var. <i>
trifida </i>
Ambrosia trifida var. trifida
great ragweed

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds .
California giant ragweed B list (noxious weeds)
Delaware giant ragweed Noxious weed
Illinois giant ragweed Noxious weed 1
1 within the corporate limits of cities, villages, and incorporated towns
U.S. Weed Information
Ambrosia trifida giant ragweed great ragweed horseweed This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.
N'EAST Uva, R.H., J.C. Neal,and J.M. DiTomaso. 1997. Weeds of the Northeast . Cornell University Press. Ithaca, New York.
NE&GP Stubbendieck, J., G.Y. Friisoe,and M.R. Bolick. 1994. Weeds of Nebraska and the Great Plains . Nebraska Department of Agriculture, Bureau of Plant Industry. Lincoln, Nebraska.
SWSS Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM . Southern Weed Science Society. Champaign, Illinois.
WSWS Whitson, T.D. (ed.) et al.. 1996. Weeds of the West . Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming. Laramie, Wyoming.

Wetland Status

Interpreting Wetland Status

North America
Alaska FAC
Arid West FAC
Atlantic and Gulf Coastal Plain FAC
Eastern Mountains and Piedmont FAC
Great Plains FAC
Midwest FAC
Northcentral & Northeast FAC
Western Mountains, Valleys, and Coast FAC

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (AMTR)
CalPhotos (AMTR)
Integrated Taxonomic Information System (AMTR)
Jepson Interchange (University of California - Berkeley) (AMTR)
Lady Bird Johnson Wildflower Center Native Plant Information Network (AMTR)
Native American Ethnobotany (University of Michigan - Dearborn) (AMTR)
USF Atlas of Florida Vascular Plants (AMTR)
University of Tennessee Herbarium (Distribution) (AMTR)
University of Washington Burke Museum (AMTR)
Related Websites
DE-Delaware Cooperative Extension: Weed Control in Corn (AMTR)
FMC Ragweeds Farming Solutions (AMTR)
KY-Agripedia Seed Identification (University of Kentucky) (AMTR)
Rutgers Cooperative Extension: abstract & image (AMTR)
Seedling & leaf images (AMTR)
Virginia: abstract & image (AMTR)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Miller Low Minor

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Miller

Sources

Miller, J.H., and K.V. Miller. 1999. Forest plants of the southeast and their wildlife uses . Southern Weed Science Society.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover


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Following modified from Flora of North America
   Top | See original

Link to Flora of North America home
 
All Floras       Advanced Search
FNA Vol. 21 Page 11, 13 , 14 , 15 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Ambrosia

10. Ambrosia trifida Linnaeus, Sp. Pl. 2: 987. 1753.

Giant ragweed, grande herbe à poux

Ambrosia aptera de Candolle; A. trifida var. integrifolia (Muhlenberg ex Willdenow) Torrey & A. Gray; A. trifida var. texana Scheele

Annuals, 30—150(—400+) cm. Stems erect. Leaves mostly opposite; petioles 10—30(—70+) mm; blades rounded-deltate to ovate or elliptic, 40—150(—250+) × 30—70(—200+) mm, usually some blades palmately 3(—5)-lobed, bases truncate to cuneate (sometimes decurrent onto petioles), margins usually toothed, rarely entire, abaxial and adaxial faces ± scabrellous and gland-dotted. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 1—3+ mm; involucres ± saucer-shaped, 2—4 mm diam., scabrellous (often with 1—3 black nerves); florets 3—25+. Burs: bodies ± pyramidal, 3—5(—7+) mm, glabrous or glabrate, spines 4—5, ± distal, ± acerose, 0.5—1 mm, tips straight (bases ± decurrent as ribs). 2 n = 24, 48.

Flowering Jul—Nov. Disturbed sites, waste places, damp soils; 0—1600 m; Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico (Chihuahua).

The name Ambrosia × helenae Rouleau applies to hybrids between A. artemisiifolia and A. trifida . Hybrids between A. bidentata and A. trifida have been recorded. Ambrosia trifida may be no longer extant in British Columbia.

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ambrosia+trifida+var.+trifida+&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ambrosia+trifida+var.+trifida+&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

CalPhotos    
Contributors       Log In  
 

Number of matches : 5
Query: SELECT * FROM img WHERE ready=1 and taxon like "Ambrosia trifida var. trifida%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Ambrosia trifida var. trifida
Ambrosia trifida var. trifida
Giant Ragweed
ID: 0000 1111 1234 1457 [detail]
© 2016 Keir Morse

Ambrosia trifida var. trifida
Ambrosia trifida var. trifida
Giant Ragweed
ID: 0000 1111 1234 1458 [detail]
© 2016 Keir Morse

Ambrosia trifida var. trifida
Ambrosia trifida var. trifida
Giant Ragweed
ID: 0000 1111 1234 1459 [detail]
© 2016 Keir Morse

Ambrosia trifida var. trifida
Ambrosia trifida var. trifida
Giant Ragweed
ID: 0000 1111 1234 1460 [detail]
© 2016 Keir Morse

Ambrosia trifida var. trifida
Ambrosia trifida var. trifida
Giant Ragweed
ID: 0000 1111 1234 1461 [detail]
© 2016 Keir Morse

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


Copyright © 1995-2018 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ambrosia+trifida&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ambrosia+trifida&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

CalPhotos    
Contributors       Log In  
 

Number of matches : 30
Query: SELECT * FROM img WHERE ready=1 and taxon like "Ambrosia trifida%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0175 3301 3807 0002 [detail]
© 2001 CDFA

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0175 3301 3807 0003 [detail]
© 2001 CDFA

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0175 3301 3807 0004 [detail]
© 2001 CDFA

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0175 3301 3807 0001 [detail]
© 2001 CDFA

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0105 0429 [detail]
© 2005 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
Blood Ragweed
ID: 0000 0000 0405 1760 [detail]
© 2005 Lisa Powers

Ambrosia trifida
Ambrosia trifida
Blood Ragweed
ID: 0000 0000 0405 1761 [detail]
© 2005 Lisa Powers

Ambrosia trifida
Ambrosia trifida
ID: 0000 0000 0408 1213 [detail]
© 2008 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
ID: 0000 0000 0408 1212 [detail]
© 2008 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
ID: 0000 0000 0408 1211 [detail]
© 2008 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
ID: 0000 0000 0408 1210 [detail]
© 2008 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
ID: 0000 0000 0506 1094 [detail]
© 2006 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
ID: 0000 0000 0510 0087 [detail]
© 2010 Louis-M. Landry

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0710 1441 [detail]
© 2010 Jean Pawek

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0710 1442 [detail]
© 2010 Jean Pawek

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0710 1604 [detail]
© 2010 Jean Pawek

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0710 1605 [detail]
© 2010 Jean Pawek

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0215 0961 [detail]
© 2015 Richard Spellenberg

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0215 0962 [detail]
© 2015 Richard Spellenberg

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0215 0963 [detail]
© 2015 Richard Spellenberg

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0315 0533 [detail]
© 2015 Richard Spellenberg

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0315 0534 [detail]
© 2015 Richard Spellenberg

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0315 0535 [detail]
© 2015 Richard Spellenberg

Ambrosia trifida
Ambrosia trifida
Giant Ragweed
ID: 0000 0000 0315 0536 [detail]
© 2015 Richard Spellenberg

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


Copyright © 1995-2018 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Updated: 2018-09-24 06:36:49 gmt
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