Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit 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.

ERYSIMUM

WALLFLOWER

Robert A. Price

Annual to subshrub; hairs appressed, forked to many-branched
Leaves in basal rosettes and cauline, simple, entire to lobed
Flower: petals clawed, generally cream to orange; stigma 2-lobed
Fruit narrow, round, 4-sided, or ± flattened (generally parallel to septum); style 0.2–5 mm
Seeds 1–2 rows per chamber, 1–4 mm, often ± winged
Species in genus: 160+ species: temp n hemisphere, especially Eurasia
Etymology: (Greek: to help, from medicinal uses)
Reference: [Rossbach 1958 Madroño 14:261–267]
Incl Cheiranthus ; native CA taxa all related to E. capitatum.

Native

E. insulare Greene

Perennial or subshrub
Stems 5–60 cm, much-branched; some elongate, non-flower
Leaves linear to oblanceolate, ± entire; hairs 2–several-branched; lower 3–15 cm
Flower: petals 13–20 mm, yellow (-orange)
Fruit ascending or spreading, 2–10 cm, 1.4–4 mm wide, generally 4-sided to flattened perpendicular to septum, ± fleshy when immature; style 0.5–3 mm
Seed 1.5–3 mm, 0.9–1.8 mm wide, < 2 mm thick; wing 0 or at tip
Chromosomes: n=18
Ecology: Coastal dunes, cliffs
Elevation: 0–300 m.
Bioregional distribution: s Central Coast, n South Coast, n Channel Islands.

Native

subsp. insulare

ISLAND WALLFLOWER


Stem 5–30 cm
Leaf 2–9 cm; hairs generally 2-branched
Fruit flattened perpendicular to septum
Seed 1–2 mm thick
Ecology: UNCOMMON. Mesas, cliffs
Elevation: 0–300 m.
Bioregional distribution: n Channel Islands.Variable on Santa Rosa, Anacapa islands
Horticultural information: DRY, DRN, SUN: 14, 15, 16, 17, 22, 23, 24
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ERYSIMUM%20insulare%20subsp.%20insulare being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Erysimum insulare subsp. insulare
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