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Conium maculatum L.
POISON HEMLOCK
Hemlock

Life   Plantae   Dicotyledoneae   Apiaceae   Conium

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Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum
Conium maculatum
© Copyright Bobby Hattaway 2011 · 5
Conium maculatum

Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena crataegi @ BBSL (1)

Andrena cressonii @ BBSL (2)

Andrena mariae @ I_ADG (1)

Andrena prunorum @ BBSL (1)
Aphididae  Cavariella ( @ AMNH_PBI (4)

Cavariella pastinacae @ AMNH_PBI (1)

Dysaphis ( @ AMNH_PBI (1)

Hyadaphis foeniculi @ AMNH_PBI (16)
Apidae  Eucera edwardsii @ BBSL (1)
Braconidae  Lysiphlebus ( @ AMNH_PBI (17)
Cicadellidae  Empoasca ( @ UCR_ENT (9)
Coccidae  Parasaissetia nigra @ CSCA_TCN (1)
Coccinellidae  Harmonia axyridis @ I_LB (1)
Diaspididae  Lepidosaphes ulmi @ UCR_ENT (1)
Erysiphaceae  Erysiphe umbelliferarum @ BPI (1)
Halictidae  Halictus tripartitus @ BBSL (2)
Helicinidae  Hendersonia cylindrospora @ BPI (2)
Miridae  Diomocoris @ UNSW_ENT (2)

Lygus hesperus @ AMNH_PBI (1)

Orthops scutellatus @ AMNH_PBI (2)
Mycosphaerellaceae  Mycosphaerella taeniographa @ BPI (2)

Septoria conii @ 378325A (1); 378325B (1)

Septoria petroselini @ BPI (1)
Peronosporaceae  Plasmopara conii @ BPI (2)

Plasmopara nivea @ BPI (4)
Phaeosphaeriaceae  Stagonospora pulchra @ BPI (3)
Pucciniaceae  Puccinia bullata @ BPI (12)

Puccinia conii @ BPI (57)

Puccinia discors @ BPI (5)
Reduviidae  Nalata @ AMNH_PBI (1)

Opisthacidius @ AMNH_PBI (1)

Phymata severini @ AMNH_PBI (3)

Pseudozelurus arizonicus @ AMNH_PBI (7)

Reduvius senilis @ AMNH_PBI (1)

Zelurus americanus @ AMNH_PBI (3)
Stereaceae  Stereum sanguinolentum @ BPI (1)
Syrphidae  Copestylum marginatum @ I_ADG (1)
Tachinidae  Gymnosoma rotundatum @ I_ADG (1)
_  Euscelidius variegatus @ UCR_ENT (2)

Phomatosporopsis angelicae @ BPI (3)

unknown unknown @ AMNH_PBI (18)

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Following modified from Global Invasive Species Team, The Nature Conservancy
   Top | See original

&pull 20q v5.145 20180528: Error 403 Forbidden http://wiki.bugwood.org/Conium_maculatum/

Following modified from Delaware Wildflowers
   Top | See original

Delaware Wildflowers  •  Scientific names

Conium maculatum L. Poison-hemlock
Apiaceae — Carrot family
Invasive non-native
Conium maculatum
Brandywine Creek State Park
May 2002

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
   Top | See original


Conium maculatum L.

Poison Hemlock

Conium maculatum plant

Family - Apiaceae

Stems - To 3m tall, herbaceous, green with purple or black spots, sometimes entirely purple, often glaucous, glabrous, erect, from large taproot.

Conium maculatum stem Stem.

Leaves - Alternate, large, to 40cm long, about as broad as long, ternate, glabrous, broadly ovate in outline. Leaflets pinnatifid. Lobes serrate.

Conium maculatum leaf

Inflorescence - Multiple compound umbels terminating the stems. Umbels and umbellets subtended by attenuate bracts to 5mm long. Rays glabrous. Flowers +/-15 per umbellet.

Conium maculatum inflorescence

Flowers - Petals 5, white, subequal but typically with one petal larger than the others, glabrous, to 1.2mm long, 1mm broad, cuneate at base. Apex of petal apiculate with the apiculus curving adaxially. Margins of petal folding slightly downward. Stamens 5, alternating with petals. Filaments to 1mm long, white, glabrous. Anthers pale yellow to whitish, .15mm broad. Stylopodium present, slightly flattened, greenish.

Conium maculatum flowers Flowers close-up.

Flowering - May - August.

Habitat - Waste groung, disturbed sites, pastures, open fields, low ground, railroads, roadsides.

Origin - Native to Europe.

Other info. - Although this plant may smell like fennel ( Foeniculum sp. ) , or Finocchio in Italian, when bruised or crushed, it should not be eaten as it is very toxic.
No other species in the family has such large and divided leaves as C. maculatum , so the plant can be easily distinguished from a distance. It is a very common weed in Missouri.

Photographs taken at the Kansas City Zoo, 5-22-00, and in Eminence, MO., 6-6-03.


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Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Conium+maculatum&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=Conium+maculatum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 86
Query: SELECT * FROM img WHERE ready=1 and taxon like "Conium maculatum%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 0175 3301 2283 0013 [detail]
© 2001 CDFA

Conium maculatum
Conium maculatum
Poison-hemlock
ID: 1335 3153 0669 0096 [detail]
J. E.(Jed) and Bonnie McClellan
© 2002 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 8253 3202 0971 0111 [detail]
Charles Webber
© 1999 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 5207 1611 1136 0071 [detail]
© 1995 Saint Mary's College of California

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 5207 1611 1136 0073 [detail]
© 1995 Saint Mary's College of California

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 8253 3202 4137 0009 [detail]
Beatrice F. Howitt
© 1999 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 8253 3202 4138 0007 [detail]
J. E.(Jed) and Bonnie McClellan
© 1999 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 8120 3181 4954 0085 [detail]
Charles Webber
© 1998 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 5207 1611 1136 0072 [detail]
© 1995 Saint Mary's College of California

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 8120 3181 4904 0115 [detail]
Charles Webber
© 1998 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 9092 3191 3543 0001 [detail]
Gerald and Buff Corsi
© 1999 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 0175 3301 2283 0012 [detail]
© 2001 CDFA

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 1336 3162 1814 0014 [detail]
Jo-Ann Ordano
© 2004 California Academy of Sciences

Conium maculatum
Conium maculatum
Common Poison-hemlock
ID: 0000 0000 0706 0058 [detail]
© 2006 Jennifer Naegele

Conium maculatum
Conium maculatum
Common Poison-hemlock
ID: 0000 0000 0706 0059 [detail]
© 2006 Jennifer Naegele

Conium maculatum
Conium maculatum
Common Poison-hemlock
ID: 0000 0000 0706 0060 [detail]
© 2006 Jennifer Naegele

Conium maculatum
Conium maculatum
Common Poison-hemlock
ID: 0000 0000 0706 0061 [detail]
© 2006 Jennifer Naegele

Conium maculatum
Conium maculatum
Common Poison-hemlock
ID: 0000 0000 0706 0062 [detail]
© 2006 Jennifer Naegele

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 1342 3162 2233 0123 [detail]
Gerald and Buff Corsi
© 2007 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 1342 3162 2708 0087 [detail]
J. E.(Jed) and Bonnie McClellan
© 2007 California Academy of Sciences

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 0000 0000 0808 1912 [detail]
© 2008 John Dittes

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 0000 0000 0808 1913 [detail]
© 2008 John Dittes

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 0000 0000 0808 2014 [detail]
© 2008 John Dittes

Conium maculatum
Conium maculatum
Poison Hemlock
ID: 0000 0000 1208 0356 [detail]
© 2008 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 .   


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