Difference between revisions of "Draba reptans"
Rhodora 36: 368. 1934.
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|name=Arabis reptans | |name=Arabis reptans | ||
|authority=Lamarck | |authority=Lamarck | ||
+ | |rank=species | ||
|publication_title=in J. Lamarck et al., Encycl. | |publication_title=in J. Lamarck et al., Encycl. | ||
|publication_place=1: 222. 1783 | |publication_place=1: 222. 1783 | ||
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|name=Draba caroliniana | |name=Draba caroliniana | ||
|authority=Walter | |authority=Walter | ||
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba caroliniana var. dolichocarpa | |name=Draba caroliniana var. dolichocarpa | ||
|authority=O. E. Schulz | |authority=O. E. Schulz | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba caroliniana var. hunteri | |name=Draba caroliniana var. hunteri | ||
|authority=Payson & H. St. John | |authority=Payson & H. St. John | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba caroliniana var. micrantha | |name=Draba caroliniana var. micrantha | ||
|authority=(Nuttall) A. Gray | |authority=(Nuttall) A. Gray | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba caroliniana subsp. stellifera | |name=Draba caroliniana subsp. stellifera | ||
|authority=(O. E. Schulz) Payson & H. St. John | |authority=(O. E. Schulz) Payson & H. St. John | ||
+ | |rank=subspecies | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba caroliniana var. umbellata | |name=Draba caroliniana var. umbellata | ||
|authority=Torrey & A. Gray | |authority=Torrey & A. Gray | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba coloradensis | |name=Draba coloradensis | ||
|authority=(Michaux) Rafinesque | |authority=(Michaux) Rafinesque | ||
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba hispidula | |name=Draba hispidula | ||
|authority=(Nuttall) Lunell | |authority=(Nuttall) Lunell | ||
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba micrantha | |name=Draba micrantha | ||
− | |authority= | + | |authority= |
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba reptans var. micrantha | |name=Draba reptans var. micrantha | ||
|authority=(Nuttall) Fernald | |authority=(Nuttall) Fernald | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba reptans subsp. stellifera | |name=Draba reptans subsp. stellifera | ||
|authority=(O. E. Schulz) Abrams | |authority=(O. E. Schulz) Abrams | ||
+ | |rank=subspecies | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba reptans var. stellifera | |name=Draba reptans var. stellifera | ||
|authority=(O. E. Schulz) C. L. Hitchcock | |authority=(O. E. Schulz) C. L. Hitchcock | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Draba umbellata | |name=Draba umbellata | ||
− | |authority= | + | |authority= |
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Tomostima caroliniana | |name=Tomostima caroliniana | ||
− | |authority= | + | |authority= |
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Tomostima hispidula | |name=Tomostima hispidula | ||
− | |authority= | + | |authority= |
+ | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Tomostima micrantha | |name=Tomostima micrantha | ||
− | |authority= | + | |authority= |
+ | |rank=species | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba reptans | |hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba reptans | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Draba reptans | name=Draba reptans | ||
− | |||
|authority=(Lamarck) Fernald | |authority=(Lamarck) Fernald | ||
|rank=species | |rank=species | ||
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|publication year=1934 | |publication year=1934 | ||
|special status= | |special status= | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_458.xml |
|tribe=Brassicaceae tribe Arabideae | |tribe=Brassicaceae tribe Arabideae | ||
|genus=Draba | |genus=Draba |
Revision as of 23:16, 16 December 2019
Annuals; scapose or subscapose. Stems (simple or few from, or distal to, base), unbranched, (0.1–)0.3–1.2(–1.6) dm, sparsely to densely pubescent proximally, trichomes 2 (or 3)-rayed, 0.1–0.6 mm, sometimes with simple or spurred ones, to 0.9 mm, distally usually glabrous, rarely with few trichomes. Basal leaves not rosulate; petiole obscure; blade elliptic or spatulate to obovate or suborbicular, 0.5–2.3(–3) cm × 1.5–8(–13) mm, margins entire, surfaces pubescent abaxially with stalked, 2–4-rayed trichomes, 0.1–0.5 mm, adaxially with simple trichomes, 0.6–1 mm, with stalked, 2-rayed ones, to 0.7 mm. Cauline leaves usually 0, rarely 1–3; sessile; blade similar to basal. Racemes (3–)5–12(–16)-flowered, ebracteate, (subumbellate), not elongated in fruit; rachis not flexuous, usually glabrous, rarely sparsely pubescent. Fruiting pedicels horizontal to divaricate-ascending, straight, (1–)2–7(–9) mm, glabrous or glabrate. Flowers: (late-season ones cleistogamous, apetalous); sepals oblong, 1.5–2.3 mm, pubescent, (trichomes simple); petals (rarely absent), white, spatulate, 2–4.5 × 1–1.5 mm; anthers ovate, 0.4–0.5 mm. Fruits linear to linear-oblong, plane, flattened, (5–)7–16(–20) × 1.2–2.3 mm; valves glabrous or pubescent, trichomes usually simple and antrorse, 0.1–0.3 mm, rarely with fewer, spurred or 2-rayed ones; ovules 32–88 per ovary; style 0.02–0.1 mm. Seeds oblong to ovoid, 0.5–0.8 × 0.3–0.5 mm. 2n = 16, 30, 32.
Phenology: Flowering Feb–Jun(-Aug).
Habitat: Rock outcrops, dry slopes and hillsides, prairies, glades, roadsides, disturbed sites
Elevation: 0-3000 m
Distribution
![V7 458-distribution-map.gif](/w/images/5/5b/V7_458-distribution-map.gif)
Alta., B.C., Man., Ont., Sask., Ala., Ariz., Ark., Calif., Colo., Ga., Idaho, Ill., Iowa, Kans., Mass., Mich., Minn., Mo., Mont., Nebr., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., S.C., S.Dak., Tenn., Tex., Utah, Wash., Wis., Wyo.
Discussion
Draba reptans is often confused with D. cuneifolia, but the two are easily separated. The rachises and pedicels of D. reptans are usually glabrous (rarely with a few isolated trichomes); those of D. cuneifolia are always densely pubescent. Interestingly, both species show parallel variations in chromosome number; it is currently unclear whether this variation is real or the result of misidentified specimens and/or erroneous counts.
Selected References
None.