TREATMENT FROM THE JEPSON MANUAL	previous taxon | next taxon Jepson Interchange (more information)
	©Copyright 1993 by the Regents of the University of California Print edition is available from the University of California Press

	The second edition of The Jepson Manual (2012) is available from the University of California Press
	See also the Jepson eFlora, which parallels the Second Edition

BRASSICACEAE

MUSTARD FAMILY

Reed C. Rollins, except as specified

Annual to subshrub
Leaves generally basal and cauline, alternate, generally simple; stipules 0
Inflorescence: generally raceme
Flower bisexual; sepals 4, free; petals (0)4, free, generally white or yellow, often clawed; stamens generally (2,4)6, generally 4 long, 2 short; ovary 1, superior, chambers generally 2, septum membranous, connecting 2 parietal placentas, style 1, stigma simple or 2-lobed
Fruit: generally capsule ("silique") with 2 deciduous valves, sometimes breaking transversely or indehiscent
Seeds 1–many per chamber
Genera in family: 300+ genera, 3000+ species: worldwide, especially cool regions; some cultivated for food (especially Brassica, Raphanus ) and ornamental
Recent taxonomic note: Recently treated to include Capparaceae [Rodman et al. 1993 Ann Missouri Bot Gard 80:686–699; Rollins 1993 Cruciferae of Continental North America. Stanford Univ Press]
Family description, key to genera by Robert A. Price.

SIBARA

Annual, biennial
Stems 1–several from base, generally erect; hairs 0 or simple or branched
Leaves: basal and lower cauline pinnately lobed to 1-pinnate; upper often simpler, grayish green
Inflorescence elongate, open
Flower small; sepals ± oblong to ovate, bases generally not sac-like; petals spoon-shaped to ± oblong, white to purplish
Fruit linear, flat parallel to septum or ± cylindric; valve veined or not
Seed oblong or ± round, winged or not; embryonic root at back of 1 cotyledon or at edges of 1 or both
Species in genus: 10 species: North America
Etymology: (Anagram of Arabis)

Native

S. rosulata Rollins

Annual
Stems 1–few, 1–3 dm; branches above
Leaves: basal rosetted, 3–5 cm, persistent, deeply pinnately lobed, lobes 4–8 mm, 1–2 mm wide, hairs 0 or sparse, simple or branched; lower cauline ± lobed, upper entire
Flower: sepals 1.5–2 mm, oblong; petals 2.5–3 mm, narrowly spoon-shaped, white
Fruit ascending, 15–30 mm, < 1.5 mm wide, flat, glabrous; pedicel ascending, 2–3 mm, upcurved, glabrous; style 2–3 mm, expanded toward tip
Seed < 1 mm wide, oblong; wing 0; embryonic root at edges of both cotyledons
Ecology: Sandy or gravelly washes, scree, calcareous rubble
Elevation: 250–950 m.
Bioregional distribution: e Mojave Desert
Flowering time: Mar–Apr

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Retrieve Jepson Interchange Index to Plant Names entry for Sibara rosulata
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