Euclidium W.T.Aiton

Mustard (en), Euclidium (fr)

Genus

Angiosperms > Brassicales > Brassicaceae

Characteristics

Annuals; not scapose; scabrous, trichomes stalked, 2-forked, submalpighiaceous, mixed with fewer, simple, and, rarely, 3-forked ones, usually different sizes. Stems erect or ascending, unbranched or branched. Leaves basal and cauline; petiolate, sessile, or subsessile; basal (often withered by flowering), not rosulate, petiolate, blade margins entire, dentate, or repand, rarely pinnatifid; cauline sessile or subsessile, blade similar to basal, margins entire, dentate, or repand. Racemes (corymbose), elongated in fruit. Fruiting pedicels erect, stout. Flowers: sepals ovate to oblong; petals white, narrowly spatulate, (slightly longer than sepals), claw slightly differentiated from blade (shorter than sepals, apex emarginate); stamens slightly tetradynamous; filaments not dilated basally; anthers ovate, (apiculate); nectar glands (4), lateral, 1 on each side of lateral stamen. Fruits silicles (nutletlike), indehiscent, sessile, ovoid, subterete to slightly 4-angled; valves not veined, (thickened, woody), scabrous; replum strongly expanded laterally; septum complete, (thickened); ovules 2 per ovary, (subapical); style (persistent), obsolete or distinct; stigma capitate, 2-lobed (lobes not decurrent). Seeds aseriate, plump, not winged, oblong; seed coat (smooth), not mucilaginous when wetted; cotyledons accumbent or obliquely so.
More
Herbs annual. Trichomes unicellular, eglandular, simple and stalked forked, in different sizes, some subsetose. Stems erect or ascending, simple or branched. Basal leaves petiolate, not rosulate, simple, entire, dentate, or rarely pinnatifid, often withered by flowering. Cauline leaves similar to basal, entire or dentate, reduced in size upward. Racemes ebracteate, elongated in fruit. Fruiting pedicels stout, thickened, erect, appressed to rachis. Sepals oblong, erect, base of lateral pair not saccate. Petals white, slightly longer than sepals; blade narrowly spatulate, apex emarginate; claw slightly differentiated from blade, shorter than sepals. Stamens 6, slightly tetradynamous; filaments not dilated at base; anthers ovate, apiculate at apex. Nectar glands 4, lateral, 1 on each side of lateral stamen; median glands absent. Ovules 2 per ovary, subapical. Fruit indehiscent, nutletlike silicles, ovoid, slightly 4-angled, sessile; valves thickened, woody, veinless, rough pubescent; replum strongly expanded laterally; septum complete, thickened; style to 1.8 mm, stout, subconical, curved, persistent; stigma capitate, 2-lobed, lobes not decurrent. Seeds wingless, oblong, plump; seed coat smooth, not mucilaginous when wetted; cotyledons accumbent or obliquely so.
Annual herbs. Sepals non-saccate. Petals spathulate, not clawed. Stamens 6. Nectariferous glands 4, one each side of lateral stamens. Stigma bilobed. Silicula indehiscent. Seeds 1 per locule. Radicle accumbent.
Life form annual
Growth form herb
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Sexuality hermaphrodite
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Environment

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Hardiness (USDA) 4-10

Usage

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Cultivation

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Distribution

Euclidium world distribution map, present in Australia, China, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:331599-2
WFO ID wfo-4000014121
COL ID 4F8S
BDTFX ID 86414
INPN ID 192367
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Euclidium

Lower taxons

Euclidium syriacum