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Lepidium L. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Species Plantarum 2: 643. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: About 150 species of nearly cosmopolitan distribution; only 9 species known from our area.

 

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Annual to perennial herbs, sometimes woody below, often much branched, glabrous or hairy with usually simple hairs; branches often apparently dichoto¬mous. Leaves usually linear or elliptic, entire, toothed or pinnatifid; lower often stalked; upper sessile or sub-sessile. Racemes corymbose, ebracteate, often dense. Flowers small, white, rarely yellowish or pinkish, pedicellate. Sepals 4, short, subequal, oblong, obtuse, glabrous, often green with white margin; inner slightly broad but not saccate at the base. Petals 4, small, linear to spathulate, sometimes shorter than the sepals, rarely absent or rudimentary. Stamens 6, or by abortion 4 or 2; filaments simple; anthers short, ovoid or suborbicular, obtuse. Nectar glands usually fragmentary, minute, present between the stamen bases. Ovary flat, elliptic with generally two pendulous ovules; style short or absent; stigma capitate, often subretuse, usually subsessile or sessile in fruit. Siliculae ovate, obovate, orbicular or broadly elliptic, apex often ± notched, laterally flattened, dehiscent (rarely subdehiscent), bilocular; valves usually strongly keeled, often slightly winged towards the apex; septum narrowly elliptic, membranous, not veined; seeds generally one in each locule, ± ovate (often oblique), brown; radicle incumbent or obliquely so.
 

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1 Pedicel often 2-3 mm long in fruit, thickened and appressed Lepidium aucheri
+ Pedicel often 4-8 mm long in fruit, neither thickened nor appressed (rarely subappressed.) (2)
2 (1) Siliculae often deeply notched at the apex, usually 5-6 mm long Lepidium sativum
+ Siliculae slightly or obscurely notched at the apex, usually 2-3 mm long (3)
3 (2) Annual or biennial (4)
+ Perennial (8)
4 (3) Leaves dimorphic; lower and basal bipinnatisect; upper ovate cordate, entire Lepidium perfoliatum
+ Leaves not dimorphic, pinnatifid, dentate to linear (5)
5 (4) Racemes ± capitate in fruit, not more than 3 cm long Lepidium capitatum
+ Racemes elongated, 5-10 cm long in fruit (6)
6 (5) Petals longer than the sepals; leaves bristly or ciliate Lepidium virginicum
+ Petals shorter than the sepals or absent; leaves usually glabrous or with short, usually capitate hairs (7)
7 (6) Stem usually single, and with larger leaves below and a crown of branches above; upper cauline leaves oblanceolate-spathulate, usually entire; petals 1/2-2/3 as long as the sepals (sometimes 0) ; siliculae with entire or rarely slightly emarginate apex Lepidium pinnatifidum
+ Stem usually branched all over and often with similar leaves; upper cauline leaves pinnatipartite (or distantly toothed) to linear; petals absent, or if present rudi-mentary; siliculae distinctly notched at the apex Lepidium apetalum
8 (3) Stem glabrous; mature siliculae smooth or faintly reticulate; inflorescence 30-50-flowered Lepidium latifolium
+ Stem papillose; mature siliculae conspicuously reticulate-alveolate; inflorescence 15-20-flowered Lepidium cartilagineum
 
 
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