Yermo xanthocephalus
(Desert Yellowhead)Overview:
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Conservation Status
US Endangered Species Act: Threatened. The Desert yellowhead was first listed on March 14, 2002. It is currently designated as Threatened in the Entire Range. Within the area covered by this listing, this species is known to occur in: Wyoming. The U.S. Fish and Wildlife Service Mountain-Prairie Region (Region 6) is the lead region for this entity. More info. | |
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Taxonomy
- Kingdom: Plantae
- Plants
- Phylum: Tracheophyta
- Vascular Plants
- Class: Magnoliopsida
- Dicotyledons
- Order: Asterales
- Family: Noctuoidea
- Genus: Yermo
Dorn, Madroño. 38: 199, fig. 1. 1991. - [Spanish, an uninhabited and utterly inhospitable place]
- Specific epithet: xanthocephalus Dorn
- Botanical name: Yermo xanthocephalus Dorn
- Specific epithet: xanthocephalus Dorn
- Genus: Yermo
Dorn, Madroño. 38: 199, fig. 1. 1991. - [Spanish, an uninhabited and utterly inhospitable place]
- Family: Noctuoidea
- Order: Asterales
- Class: Magnoliopsida
- Dicotyledons
- Phylum: Tracheophyta
- Vascular Plants
Notes:
Name Status: Accepted Name. Latest taxonomic scrutiny: 15-Mar-2000
Place of publication: Madroño 38:199. 1991
Name verified on 09-Apr-2004 by ARS Systematic Botanists.
Physical Description
Genus Yermo:
Perennials, 10-30+ cm (taprooted). Stems single or clustered, erect. Leaves basal and cauline (smaller distally) ; alternate; petiolate; blades (leathery) palmately 3-nerved (nerves ± parallel), lanceolate to ovate or obovate, margins entire or ± toothed, faces glabrous. Heads discoid, (25-180) in corymbiform to paniculiform arrays (terminal and in distal leaf axils). Calyculi 0 or bractlets 1-3+. Involucres cylindric, 3-5 mm diam. Phyllaries persistent, (4-) 5(-6) in 1-2 series (bright yellow, drying pale, with greenish yellow midribs ± keeled in life), erect, distinct, oblanceolate or lanceolate to lance-linear, equal, margins scarious (apices cucullate, faces glabrous). Receptacles flat (sometimes with central cusp), smooth, epaleate. Ray florets 0. Disc florets (4-) 5(-6), bisexual, fertile; corollas yellow, tubes longer than throats, lobes 5, spreading, linear; style branches: stigmatic areas continuous, apices rounded-truncate (micro-characters tussilaginoid). Cypselae (brown) ellipsoid to oblanceoloid, slightly flattened, usually 10-ribbed, often short-hairy; pappi tardily falling, of 70+, whitish, barbellulate bristles.
Species 1: Wyoming.[1]
Habit: Forb/herb
Images:
Distribution
Range and Population
North America
Native: Wyoming.
Reproduction
Duration: Perennial
Similar Species
Members of the genus Yermo:
There are approximately 1 species, subspecies, varieties, forms, and cultivars in this genus: Y. xanthocephalus (Desert Yellowhead)
Bibliography
- Dorn, R.D. 1992. Vascular Plants of Wyoming. Cheyenne, WY: Mountain West Publishing.
- Dorn, R.D. 1999. Our Most Endangered Plants Have Yet to be Discovered. Castilleja: The Newsletter of the Wyoming Native Plant Society. 18, 4: 6-7.
- Fertig, W. (2000). State Species Abstracts. Wyoming Natural Diversity Database. http://uwadmnweb.uwyo.edu/wyndd/Plants/plant_species.htm. Accessed: 2002.
- Fertig, W.; Refsdal, C. ; Whipple, J. 1994. Wyoming rare plant field guide. Cheyenne, Wyoming: Wyoming Rare Plant Technical Committee.
- Scott, R.; Hoster, B. 2000. On the Germination and Viability of Yermo xanthocephalus Akenes. Castilleja: The Newsletter of the Wyoming Native Plant Society. 19, 1: 4-6.
- USFWS. 1999. Listing Proposals. Endangered Species Bulletin. 24, 2: 26.
More Info
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Notes
Contributors:
- Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
- Global Biodiversity Information Facility. Accessed November 22, 2007. http://www.gbif.org Mediated distribution data from provider.
- USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. URL (May 01, 2008)
Data Sources:
Accessed through GBIF Data Portal November 22, 2007:
- USDA PLANTS, USDA PLANTS Database
Identifiers:
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 507242
- Global Biodiversity Information Facility Taxonkey: 13764765
- Globally Unique Identifier: urn:lsid:ipni.org:names:959328-1
- U.S. Fish and Wildlife Service Species Identifier: Q3GI
- U.S.D.A. Plant Symbol: YEXA
- Zipcode Zoo Species Identifier: 68955
Footnotes:
- Robert D. Dorn "Yermo". in Flora of North America Vol. 20 Page 543, 634. Oxford University Press. Online at EFloras.org.
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