Draba paysonii

• Interesting Facts
• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Common Names

Description

Genus Draba

Herbs perennial , rarely annual , biennial (or subshrubs with woody stems). Trichomes simple , forked , stellate , malpighiaceous, or dendritic , stalked or sessile, often more than 1 kind present. Stems erect or ascending , sometimes prostrate , leafy or leafless and plants scapose . Basal leaves petiolate , often rosulate, simple, entire or toothed , rarely lobed . Cauline leaves petiolate or sessile, cuneate or auriculate at base , entire or dentate , sometimes absent. Racemes bracteate or ebracteate , elongated or not in fruit. Fruiting pedicels slender, erect, ascending, or divaricate . Sepals ovate , oblong , or elliptic , base of lateral pair not saccate or subsaccate, margin usually membranous. Petals yellow, white, pink, purple, orange (or rarely red) ; blade obovate , spatulate , oblong, oblanceolate , orbicular , or linear , apex obtuse , rounded , or rarely emarginate ; claw obscurely to strongly differentiated from blade. Stamens 6, tetradynamous ; filaments dilated or not at base; anthers ovate or oblong, obtuse at apex. Nectar glands 1, 2, or 4, distinct or confluent and subtending bases of all stamens; median glands present or absent; lateral glands toothlike, semiannular, or annular . Ovules 4 to numerous per ovary. Fruit dehiscent, silicles or rarely siliques, ovate, elliptic, oblong, orbicular, ovoid , globose , lanceolate, or linear, latiseptate or terete , sometimes spirally twisted; valves distinctly or obscurely veined, glabrous or pubescent ; replum rounded; septum complete , membranous, translucent ; style distinct or obsolete , glabrous; stigma capitate, entire or slightly 2-lobed. Seeds biseriate , wingless (or rarely winged ), oblong, ovate, or orbicular, flattened; seed coat minutely reticulate , not mucilaginous when wetted; cotyledons accumbent .

About 350 species: primarily in the N hemisphere, especially arctic , subarctic , alpine , and subalpine regions, with about 70 species in South America; 48 species (16 endemic) in China.

Draba is the largest and most taxonomically difficult genus in the Brassicaceae. More than 950 binomials and nearly a fourth as many infraspecific taxa have been proposed. Numerous taxa are based on trivial characters, especially the presence vs. absence of trichomes on the fruit valves. Otto Eugene Schulz (Pflanzenr. 89(IV . 105) : 1-396. 1927), hereafter Schulz (without a reference), was the last person to monograph Draba on worldwide basis. Although he accorded varietal names to forms with glabrous and pubescent fruits, this variation often occurs within the same population (see discussion under D. oreades). By contrast, petal color is taxonomically important and should be recorded in the field rather than from dried specimens because white petals sometimes dry yellow or vice versa. Another taxonomically important character is the number of ovules/seeds per ovary/fruit. This is easily obtained by counting the seeds and aborted ovules in the fruit.[1]

Physical Description

Biology

Reproduction

Duration: Perennial

Growth

Culture: Space 9-12" apart.

Soil: Minimum pH: 6.1 • Maximum pH: 7.8

Sunlight: Sun Exposure: Full Sun .

Temperature: Cold Hardiness: 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b. (map)

Taxonomy

Notes

Name Status: Accepted Name .

Last scrutiny: 2009

Similar Species

Members of the genus Draba

ZipcodeZoo has pages for 194 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

D. aizoides (Yellow Whitlow Grass) · D. albertina (Arc Dome Draba) · D. aleutica (Aleutian Draba) · D. alpina (Alpine Draba) · D. aprica (Hairy Draba) · D. arabisans (Rock Draba) · D. arctica (Arctic Whitlowgrass) · D. arctica subsp. ostenfeldii (Ostenfeld's Whitlowgrass) · D. arctogena (Fell-Field Whitlow-Grass) · D. argyrea (Silver Draba) · D. arida (Desert Draba) · D. asprella (Rough Draba) · D. asprella Greene var. kaibabensis C.L.Hitchc. (Kaibab Draba) · D. asprella Greene var. stelligera O.E.Schulz (Rough Draba) · D. asprella Greene var. zionensis (C.L.Hitchc.) Welsh & Reveal (Zion Draba) · D. asprella var. asprella (Rough Whitlowgrass) · D. asprella var. kaibabensis (Kaibab Whitlowgrass) · D. asprella var. stelligera (Rough Whitlowgrass) · D. asprella var. zionensis (Zion Draba) · D. asterophora (Lake Tahoe Draba) · D. asterophora Payson var. macrocarpa C.L.Hitchc. (Lake Tahoe Draba) · D. asterophora var. asterophora (Lake Tahoe Draba) · D. asterophora var. macrocarpa (Lake Tahoe Draba) · D. aurea (Golden Draba) · D. aureola (Golden Alpine Draba) · D. borealis (Boreal Draba) · D. borealis var. borealis (Boreal Whitlowgrass) · D. borealis var. maxima (Boreal Whitlowgrass) · D. brachycarpa (Short-Fruited Whitlow-Grass) · D. brachystylis (Shortstyle Draba) · D. breweri (Brewer's Whitlow-Grass) · D. breweri var. breweri (Cushion Draba) · D. breweri var. cana (Hoary Whitlowgrass) · D. californica (California Draba) · D. carnosula (Mt. Eddy Draba) · D. chamissonis (Cape Thompson Draba) · D. cinerea (Gray-Leaf Whitlow-Grass) · D. cinerea var. cinerea (Grayleaf Whitlowgrass) · D. cinerea var. ladogenesis (Grayleaf Whitlowgrass) · D. corrugata (Southern California Draba) · D. corrugata S.Watson var. corrugata S.Watson (Southern California Draba) · D. corrugata S.Watson var. saxosa (A.Davids.) Munz & Johnst. (Southern California Draba) · D. corrugata var. corrugata (Southern California Draba) · D. corrugata var. saxosa (Southern California Draba) · D. corymbosa (Flat-Top Draba) · D. crassa (Thick-Leaf Whitlow-Grass) · D. crassifolia (Rocky Mountain Draba) · D. crassifolia var. crassifolia (Snowbed Whitlowgrass) · D. cruciata (Mineral King Draba) · D. cruciata var. cruciata (Mineral King Whitlowgrass) · D. cuneifolia (Wedge-Leaf Whitlow Grass) · D. cuneifolia Nutt. ex Torr. & Gray var. integrifolia S.Watson (Wedgeleaf Draba) · D. cuneifolia Nutt. ex Torr. & Gray var. sonorae (Greene) Parish (Sonora Draba) · D. cuneifolia var. cuneifolia (Wedgeleaf Whitlowgrass) · D. cuneifolia var. integrifolia (Wedgeleaf Whitlowgrass) · D. cuneifolia var. sonorae (Sonoran Whitlowgrass) · D. cusickii (Cusick Whitlowgrass) · D. cusickii var. cusickii (Cusick's Draba) · D. cusickii var. cusickii B.L.Robins. ex O.E.Schulz (Cusick's Draba) · D. cusickii var. pedicellata (Cusick's Draba) · D. cusickii var. pedicellata Rollins & Price (Cusick's Draba) · D. daviesiae (Bitter Root Draba) · D. densifolia (Dense Leaf Draba) · D. exunguiculata (Clawless Draba) · D. fladnizensis (Arctic Draba) · D. fladnizensis var. fladnizensis (Austrian Draba) · D. fladnizensis var. pattersonii (Austrian Draba) · D. fladnizensis Wulfen var. fladnizensis Wulfen (Austrian Draba) · D. fladnizensis Wulfen var. pattersonii (O.E.Schultz) Rollins (Austrian Draba) · D. glabella (Smooth Draba) · D. glabella var. brachycarpa (Smooth Whitlowgrass) · D. glabella var. glabella (Smooth Whitlowgrass) · D. glabella var. glabella Pursh (Smooth Whitlowgrass) · D. globosa (Beavertip Draba) · D. graminea (Rocky Mountain Draba) · D. grayana (Gray's Draba) · D. gredinii (Gredin's Whitlowgrass) · D. haynaldii (Yellow Grass) · D. helleriana (Heller's Draba) · D. helleriana Greene var. bifurcata C.L.Hitchc. (Heller's Draba) · D. helleriana Greene var. blumeri C.L.Hitchc. (Blumer Whitlowgrass) · D. helleriana Greene var. patens (Heller) O.E.Schulz (Heller Whitlowgrass) · D. helleriana var. bifurcata (Heller's Whitlowgrass) · D. helleriana var. blumeri (Blumer's Whitlowgrass) · D. helleriana var. helleriana (Heller's Draba) · D. helleriana var. patens (Heller's Whitlowgrass) · D. hitchcockii (Lost River Draba) · D. howellii (Howell's Whitlow-Grass) · D. hyperborea (North Pacific Draba) · D. incana (Twisted Draba) · D. incana var. incana (Twisted Whitlowgrass) · D. incana var. incana L. (Twisted Whitlowgrass) · D. incerta (Yellowstone Draba) · D. incrassata (Sweetwater Draba) · D. jaegeri (Jaeger Whitlowgrass) · D. juvenilis (Long Stalk Draba) · D. kamtschatica (Kamchatka Whitlowgrass) · D. kassii (Kass Draba) · D. kluanei (Kluane Park Whitlowgrass) · D. lactea (Milky Draba)

More Info

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Further Reading

• Budd's flora of the Canadian Prairie Provinces / [Ottawa]: Research Branch, Agriculture Canada, 1987. url p. 406.
• Conserving globally rare plants on lands administered by the Dillon Office of the Bureau of Land Management / Helena, MT: Natural Heritage Program, c2003. url .
• Rare plant inventory of the outstanding natural areas of the Rocky Mountain Front / prepared for United States Department of Interior, Bureau of Land Management; prepared by Lisa Ann Schassberger. Helena, Mont.: Montana Natural Heritage Program, [1988] url p. 23.
• Sensitive plant surveys in the Gallatin National Forest, Montana / prepared by Jim Vanderhorst; prepared for U.S. Forest Service, Gallatin National Forest. Helena, MT: Montana Natural Heritage Program, [1994]. url p. 73.
• Syllogeus. Ottawa, National Museum of Natural Sciences, 1972-1995. url p. 112, p. 115, p. 25, p. 27, p. 40, p. 41, p. 50, p. 75.
• The Great Basin naturalist. 52 1992 Provo, Utah: M.L. Bean Life Science Museum, Brigham Young University, 1939-1999. url p. 340.
• Vascular plant and sensitive plant species inventory for the highland mountains, Deerlodge National Forest; prepared for Deerlodge National Forest / prepared by Peter Lesica. Helena, Mont.: Montana Natural Heritage Program, [1992] url p. 22.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 11, 2012.

Data Sources

Accessed through GBIF Data Portal February 02, 2008:

• Oregon State University, Vascular Plant Collection
• USDA PLANTS, USDA PLANTS Database
• University of Alaska Museum of the North, University of Alaska Museum of the North Herbarium
• University of Washington Burke Museum, Vascular Plant Collection - University of Washington Herbarium
• Utah State University, USU-UTC Specimen Database

Identifiers

• Biodiversity Heritage Library NamebankID: 2648562
• Catalogue of Life Accepted Name Code: Mus-1567
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 22900
• Natural Heritage Network Species Identifier: PDBRA111W0
• U.S.D.A. Plant Symbol: DRPAT
• Zipcode Zoo Species Identifier: 34863

Footnotes

1. "Draba". in Flora of China Vol. 8 Page 66. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.