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Published In: Species Plantarum 2: 650. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 8/11/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced


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2. Alyssum L. (alyssum)

Plants annual (perennial elsewhere), terrestrial, with stellate, mostly appressed, nonglandular hairs. Stems 5–25 cm long, erect to spreading, usually branched near the base. Leaves alternate, 6–15(–30) mm long, the bases not clasping the stem, the margins entire. Inflorescences racemes, without bracts. Sepals erect or ascending, 1.5–2.0 mm long, oblong-elliptic. Petals shallowly notched at the tip, pale yellow or cream-colored. Styles 0.3–0.7 mm long (longer elsewhere). Fruits spreading or ascending, 3–5 mm long, about as wide as long or less than 2 times as long as wide, broadly oval to circular in outline, strongly flattened parallel to the septum, usually shallowly notched at the tip, sometimes with a minute style, dehiscing longitudinally, the valves lacking midnerves. Seeds 1 or 2 per locule, 1.0–1.5 mm long, obovate to broadly elliptic in outline, somewhat flattened, the margins narrowly winged, the surface minutely roughened, orange. About 170 species, Europe, Asia, Africa, Alaska, Canada.

Some species of Alyssum are cultivated as garden ornamentals.


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1 1. Sepals persistent through fruit maturity; fruits hairy at maturity ... 1. A. ALYSSOIDES

Alyssum alyssoides
2 1. Sepals deciduous soon after the flower opens; fruits glabrous at maturity ... 2. A. DESERTORUM Alyssum desertorum
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