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.

RORIPPA

YELLOW or WATER CRESS

Annual, biennial, perennial herb; hairs simple, rarely sac-like
Stems 1–many, prostrate to erect, branched or not, often from center of basal rosette, rooting at nodes or not
Leaves: basal, lower cauline sessile or short-petioled, entire to pinnately compound; cauline reduced upward
Inflorescence terminal and lateral
Flower generally small; petals 0 or obovate to narrowly spoon-shaped, pale to bright yellow or white
Fruit linear to round, plump; valves 2 or 4(6); pedicel ascending to recurved, slender, generally with 2 minute glands at base; style 0 or prominent, persistent
Seeds 10–200, (1)2 rows per chamber, dense, generally plump; wing 0; embryonic root at edges of both cotyledons
Species in genus: ± 75 species: worldwide
Etymology: (Old Saxon: for these, perhaps other crucifers)
Reference: [Stuckey 1972 Sida 4:277–340]

Native

R. curvipes Greene

Annual, rarely ± short-lived perennial herb, generally ± glabrous
Stem 1–5 dm, branched, often from near base; hairs often below, ± sparse
Leaves: basal ± entire to deeply pinnately lobed, rarely partly ± 1-pinnate, generally petioled; cauline 0 or 4–8 cm, 5–15 mm wide, oblong, obovate, or oblanceolate, clasping stem, entire to ± pinnately lobed
Flower: petals ascending, oblong to ± tongue-shaped, yellow
Fruit straight to upcurved, generally narrowed near middle, smooth, glabrous; pedicel 2–5 mm; style 0.5–1 mm
Seed ± reniform, finely papillate
Ecology: Wet sites
Elevation: < 2300 m.
Bioregional distribution: California Floristic Province, East of Sierra Nevada
Distribution outside California: N.America

Native

var. truncata (Jeps.) Rollins

Plant ± decumbent to erect
Flower: petals 1–1.5 mm, ± = sepals
Fruit 3–6(8) mm, 2–3.5 X longer than wide, oblong; tip ± truncate to widely obtuse; pedicel spreading to ascending
Ecology: Wet streambanks, pond margins, mud flats
Elevation: < 2300 m.
Bioregional distribution: California Floristic Province
Distribution outside California: to Canada, Texas, Mexico

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Retrieve Jepson Interchange Index to Plant Names entry for Rorippa curvipes var. truncata
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