Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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.

HUTCHINSIA

Annual; hairs 0 or sparse, minute, branched
Inflorescence open; bracts 0
Flower: petals white
Fruit ± elliptic, ± flat perpendicular to septum; wing 0; notch 0
Seeds several per chamber; wing 0; embryonic root at back of 1 cotyledon
Species in genus: 3 species: Eur, 1 apparently native in North America as well
Etymology: (E. Hutchins, Irish botanist, 1785–1815)

Native

H. procumbens (L.) Desv.


Stem ± decumbent to ± erect, (3)5–10(15) cm, many-branched
Leaves: basal and lower cauline petioled, 5–20 mm, obovate, entire to lobed; upper leaves fewer, sessile, reduced
Flower: sepals ± 1 mm; petals ± 1 mm, obovate or narrower
Fruit 2.5–3.5 mm, elliptic to ± obovate; valve veins prominent, netted; style < 0.2 mm
Chromosomes: 2n=12
Ecology: Alkali flats, saline seeps, shaded sites, sagebrush, juniper woodland
Elevation: < 2600 m.
Bioregional distribution: California (except Klamath Ranges, High Sierra Nevada)
Distribution outside California: to British Columbia, Labrador, Baja California, also Europe
Flowering time: Mar–Jul

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