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Pachycereus schottii (Engelm. ) D. R. Hunt
SENITA CACTUS
Life   Plantae   Dicotyledoneae   Cactaceae   Pachycereus


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Pachycereus schottii (Engelm.) D.R. Hunt
senita cactus

Image of Pachycereus schottii

General Information
Symbol: PASC14
Group: Dicot
Family: Cactaceae
Duration: Perennial
Growth Habit : Shrub
Tree
Native Status : L48   N
Data Source and Documentation
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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 Pachycereus thumbnails at the Plants Gallery

©G.A. Cooper. Provided by Smithsonian Institution, Department of Botany . United States, AZ, Organ Pipe National Monument, Senita Basin. Usage Requirements .

©G.A. Cooper. Provided by Smithsonian Institution, Department of Botany . United States, AZ, Organ Pipe National Monument, Senita Basin. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

Patrick J. Alexander. Usage Requirements .

slideshow

Synonyms

Symbol Scientific Name
CESC3 Cereus schottii Engelm.
LOSC5 Lophocereus schottii (Engelm.) Britton & Rose

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 Caryophyllidae
Order Caryophyllales
Family Cactaceae – Cactus family
Genus Pachycereus (A. Berger) Britton & Rose – pachycereus
Species Pachycereus schottii (Engelm.) D.R. Hunt – senita cactus

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered 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 protected plant list for that location.
Arizona Lophocereus schottii
senita Salvage restricted

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (PASC14)
CalPhotos (PASC14)
Flora of North America (PASC14)
Integrated Taxonomic Information System (CESC3)
Integrated Taxonomic Information System (LOSC5)
Integrated Taxonomic Information System (PASC14)
Lady Bird Johnson Wildflower Center Native Plant Information Network (PASC14)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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Following modified from Flora of North America
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FNA Vol. 4 Page 181, 183, 184 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 4 | Cactaceae | Pachycereus

1. Pachycereus schottii (Engelmann) D. R. Hunt, Bradleya. 5: 93. 1987.

Senita, old-man-cactus

Cereus schottii Engelmann, Proc. Amer. Acad. Arts 3: 288. 1856; Lophocereus schottii (Engelmann) Britton & Rose; Pilocereus schottii (Engelmann) Lemaire

Shrubs [to small trees], with basal branches sometimes rooting to form thickets. Stems green with red around young areoles, aging gray-green with faint waxy chevrons; ribs somewhat rounded, margins relatively flat; areoles 1-1.5 cm apart on rib crest, shield-shaped, on proximal stems 1 cm wide, those on distal stems closer together, circular; young hairs whitish gray, short. Spines strongly dimorphic, those on proximal stems usually 7-10 per areole, rose-red, aging gray, stout, usually 5-7 mm, to less than 30 mm, weakly differentiated as central and radial spines, those on distal stems usually more than 15 per areole, gray to blackish (rarely aging copper-brown), thin, flattened, twisted, to 7.5 cm; bristles 4-10 cm. Flowers lateral on stems, often several per areole, on specialized bristle-forming or transition areoles, short funnelform, 3-4.5 × 2-3 cm; flower tube thin walled, very narrow, less than 1.5 cm; nectar chamber open; scales rose with green margins; tepals spreading, reflexed by morning; outer tepals somewhat fimbriate, minutely papillate; inner tepals 25, with pink-orange center, 11-16 mm, apex acute; stamens 100, white, turning pink by next morning, to 2 cm; anthers cream; ovary small, tubercles and spines absent; styles white, short, narrow; stigma lobes erect, relatively short. Fruits candy-apple red, when immature greenish, ovoid to subspheric, 25-40 mm. Seeds helmet-shaped, often with a prominent raphe. 2 n = 22.

Flowering late Mar-Sep[-Dec]; fruiting often 1 month after flowering. Cercidium-Larrea-Olneya-Carnegiea communities, around washes, on sandy [gravelly] soils; 400-500 m; Ariz.; Mexico (Baja California, Baja California Sur, Sinaloa, Sonora).

Pachycereus schottii is primarily a Mexican species occuring in southernmost Arizona only in Organ Pipe Cactus National Monument at nine sites very close to the international boundary, where winter temperatures do not generally reach freezing. The Arizona populations do not appear to be experiencing much recruitment via seeds, but persist by vegetative propagation. In Mexico, plant height, rib number, and rib shape vary considerably with microhabitat. In subtropical thorn forest P. schottii may be a small tree with a very short trunk. Three varieties of P. schottii were formally recognized (G. S. Lindsay 1963) but need to be re-examined using DNA techniques. If varieties or subspecies are accepted, Arizona populations would represent the typical form.

In contrast to other species of Pachycereus, P. schottii and its narrowly restricted cousin P. gatesii of Baja California Sur, Mexico have the smallest flowers and seeds and the most fleshy and naked fruits. The flowering portion of each adult stem always has long, grayish bristles, inspiring the anthropomorphic vernacular names referring to old age.

The moth Upiga virescens (Pyralidae) is the obligate pollinator of Pachycereus schottii , forming a mutualistic system comparable with the yucca and yucca moth (J. N. Holland and T. H. Fleming 1999, 1999b; R. S. Folger and A. D. Zimmerman 2000). In populations near the inter-national border, flowers of P. schottii open ten minutes after sunset (J. N. Holland, pers. comm.).

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

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Number of matches : 22
Query: SELECT * FROM img WHERE ready=1 and taxon like "Pachycereus schottii%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Pachycereus schottii
Pachycereus schottii
Senita
ID: 0000 0000 0106 0917 [detail]
© 2006 Joseph Dougherty/ecology.org

Pachycereus schottii
Pachycereus schottii
Senita Cactus
ID: 0000 0000 0707 0171 [detail]
© 2007 Charles E. Jones

Pachycereus schottii
Pachycereus schottii
Senita
ID: 0000 0000 0508 2341 [detail]
© 2008 Joseph Dougherty, M.D./ecology.org

Pachycereus schottii
Pachycereus schottii
Senita
ID: 0000 0000 0311 2763 [detail]
© 2011 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2063 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2064 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2065 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2066 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2067 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2068 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senita, Whisker Cactus
ID: 0000 0000 1115 2069 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
Senista, Whisker Cactus
ID: 0000 0000 1215 1049 [detail]
© 2015 Wynn Anderson

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0736 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0737 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0738 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0739 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0740 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0741 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 0742 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 1378 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 1379 [detail]
© 2017 Zoya Akulova

Pachycereus schottii
Pachycereus schottii
ID: 0000 0000 0317 1380 [detail]
© 2017 Zoya Akulova

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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