Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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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.

IDAHOA

FLAT-POD


Species in genus: 1 sp
Etymology: (State of Idaho)

Native

I. scapigera (Hook.) A. Nelson & J.F. Macbr.

Annual, scapose, glabrous
Leaves rosetted, several–many, petioled; blades 1–3 cm, ovate, entire to deeply lobed, lobes few, oblanceolate, terminal > others
Inflorescence: peduncles many, (2)3–13 cm, 1-flowered, slender, bractless
Flower: sepals 1.4–2 mm, generally reddish or purplish; petals = or ± > sepals, white
Fruit 6–12 mm, round to widely ovate or elliptic, flattened parallel to septum; beak < 1 mm; style ± 0
Seed 3.5–5 mm wide including ± 1 mm wide wing, ± round, flat; embryonic root at edges of both cotyledons
Chromosomes: 2n=16
Ecology: Moist ledges, slopes, meadows, foothills
Elevation: 600–1900 m.
Bioregional distribution: Cascade Range, San Francisco Bay Area (Mount Hamilton), Inner North Coast Ranges (Mount Saint Helena), n Sierra Nevada, s Sierra Nevada Foothills, Inner South Coast Ranges, Great Basin Floristic Province
Distribution outside California: to British Columbia, Montana
Flowering time: Feb–Apr
Horticultural information: TRY.

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