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Draba verna L.
COMMON WHITLOWGRASS
Erophila verna; Erophila glabrescens; Erophila majuscula; Erophila conferta Wilmott; Erophila praecox (Steven) Dc; Erophila spathulata Láng; Erophila verna subsp praecox (Steven) Gremli; Erophila verna subsp spathulata (Láng) Vollm; Erophila verna var praecox (Steven) Diklic; Erophila verna var stenocarpa (Jord) Diklic; Spring draba; Draba praecox Stev; Erophila spathulata AF Lang; Erophila verna (L) Besser

Life   Plantae   Dicotyledoneae   Brassicaceae   Draba

Draba verna
© Les Mehrhoff, 2008-2010 · 5
Draba verna

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Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna
Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna

Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna
Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna

Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna
Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna

Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna
Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna

Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna
Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna

Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna
Draba verna
© Copyright Bobby Hattaway 2011 · 5
Draba verna

Draba verna, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Draba verna, inflorescence - whole - unspecified
Draba verna, leaf - basal or on lower stem
© Copyright Steve Baskauf, 2002-2011 · 4
Draba verna, leaf - basal or on lower stem

Associates · map
FamilyScientific name @ source (records)
Peronosporaceae  Peronospora erophilae @ BPI (1)

Peronospora parasitica @ BPI (6)
Pucciniaceae  Puccinia holboellii @ BPI (2)
Synchytriaceae  Synchytrium lacunosum @ BPI (1)

Synchytrium @ BPI (1)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Draba verna L. Spring Draba
(Whitlow Grass) Brassicaceae — Mustard family
Non-native
Draba verna Draba verna
Downtown Wilmington
March 2005

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Draba verna  L.

Draba verna plant

Family - Brassicaceae

Stems - Single or multiple from the base, from a small taproot, erect, herbaceous, typically simple, thin, terete, to +/-8cm tall, with forked pubescence, naked.

Leaves - In a basal rosette. The lowest of the rosette petiolate and spatulate. Upper leaves in rosette sessile, spatulate, acute, entire or with one or two serrations per margin. Leaves to +/-1cm long, 3-4mm broad, green, pubescent. The trichomes forked and often with pustulate bases.

Draba verna basals Basal rosette of plant.

Inflorescence - Terminal raceme, compact in flower, quickly elongating in fruit. Pedicels 2-3mm long in flower, to +1cm in fruit, thin, mostly glabrous. Axis of inflorescence mostly glabrous.

Flowers - Petals 4, white, clawed, glabrous, deeply divided, to 3mm long, 2mm broad. Lobes of the petals rounded. Claw to .5mm long. Stamens 6, erect. Filaments greenish-white, to -2mm long, glabrous, somewhat succulent. Anthers yellow, .2mm broad and long. Ovary superior, green, glabrous, ovoid, 1.2mm long, 1mm in diameter (in flower). Stigma capitate. Style wanting. Sepals 4, green with whitish-scarious margins, strongly cupped, sparse forked pubescent externally, glabrous internally, to 2mm long, 1.5m broad. Fruit compressed, elliptoid to orbicular or ovoid, glabrous, to 5mm long, 2-4mm broad, many-seeded, 2-valved.

Draba verna flower Flower.

Draba verna fruit Fruit.

Flowering - February - April.

Habitat - Grassy and rocky open places, lawns, pastures, roadsides, cultivated fields, waste ground.

Origin - Native to U.S.

Other info. - This tiny species is found scattered throughout much of Missouri. The plant is quite small and easily overlooked. It is easy to identify because of its basal rosette of leaves and divided petals.
Steyermark lists two varieties for the plant. Variety verna has fruits which are up to 4 times as long as broad. Variety boerhaavii Van Hall (pictures above) has fruits which are at most 2 times as long as broad.

Photographs taken at Pilot Mountain State Park, NC., 3-9-03.


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Following modified from Plants Database, United States Department of Agriculture
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Following modified from Flora of North America
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FNA Vol. 7 Page 270, 271, 345 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Draba

117. Draba verna Linnaeus, Sp. Pl. 2: 642. 1753.

Whitlow grass, whitlow wort

Draba boerhaavii (H. C. Hall) Dumortier; D. praecox Steven; D. verna var. aestivalis Lejeune; D. verna var. boerhaavii H. C. Hall; Erophila boerhaavii (H. C. Hall) Dumortier; E. krockeri Andrzejowski; E. praecox (Steven) de Candolle; E. verna (Linnaeus) L. Chevallier; E. verna subsp. praecox (Steven) Walters

Annuals; scapose. Stems (few to many from base), unbranched, (0.2-)0.5-2(-3) dm, pubescent proximally, glabrous distally, trichomes simple and 2(-4)-rayed, 0.1-0.4 mm. Basal leaves rosulate; petiolate; blade obovate, spatulate, oblanceolate, lanceolate, oblong, or, rarely, linear, 0.2-1.8(-3) cm × (0.5-)1-5(-10) mm, margins entire or 1-5-toothed on each side, surfaces pubescent with simple or stalked, 2-4-rayed trichomes, 0.1-0.5 mm. Cauline leaves 0. Racemes 4-20(-30)-flowered, ebracteate, usually considerably elongated in fruit; rachis usually flexuous, glabrous. Fruiting pedicels divaricate to ascending, straight or slightly curved upward, (2-) 5-20(-35) mm, glabrous. Flowers: sepals (green or purplish), oblong, 1-2.5 mm, glabrescent or pubescent, (trichomes simple or 2-rayed); petals white, deeply 2-fid, (1.5-)2-4.5(-6) × 1-2 mm; anthers ovate, 0.2-0.4 mm. Fruits obovate, oblanceolate, lanceolate, elliptic, oblong, or linear, plane, flattened, (2.5-)4-9(-12) × 1.5-2.5(-3.5) mm; valves glabrous; ovules (20-)32-70(-84) per ovary; style 0.02-0.2 mm. Seeds ovoid (slightly flattened), 0.3-0.6(-0.8) × 0.2-0.4 mm. 2 n = 14, 16, 20, 24, 28, 30, 32, 34, 36, 38, 40, 52, 54, 58, 60, 64.

Flowering Feb-May. Cedar glades, lawns, fields, pastures, waste places, grassy hillsides, disturbed sites, roadsides; 0-2500 m; introduced; Alta., B.C., N.B., Ont., Que.; Ala., Ark., Calif., Conn., Del., D.C., Ga., Idaho, Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Miss., Mo., Mont., Nev., N.H., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.C., Tenn., Utah, Vt., Va., Wash., W.Va., Wyo.; Europe; Asia; nw Africa; introduced also in Central America, South America, Australia.

Draba verna represents a highly variable and taxonomically difficult complex within which species, subspecies, varieties, and forms have been named (O. E. Schulz 1927); only those synonyms pertaining to North America are listed above. Most of the taxonomic difficulties are the results of disploidy, autogamy, and hybridization. The morphological extremes are connected by intermediate forms in every conceivable character. Furthermore, there appears to be no correlation between morphology, cytology, geography, and ecology to support the division of this complex into meaningful taxa. A complex cytological picture was presented by Ø. Winge (1940), including the highest count of 2 n = 94, which has not been confirmed by subsequent botanists.

Erophila vulgaris de Candolle is an illegitimate name for Draba verna .

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Updated: 2018-05-20 12:57:56 gmt
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