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BRASSICACEAE (Cruciferae) MUSTARD FAMILY

Ihsan A. Al-Shehbaz, except as noted

Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1–many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
± 330 genera, 3780 species: worldwide, especially temperate. [Al-Shehbaz et al. 2006 Plant Syst Evol 259:89–120] Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central North Coast Ranges, Carrichtera annua (L.) DC. in South Coast, Iberis sempervirens L., Iberis umbellata L. in Peninsular Ranges, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern Outer North Coast Ranges, Central Coast. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Brassicaceae

DITHYREA SPECTACLEPOD
Annual, perennial herb; hairs dense, stalked, stellate, occasionally simple. Leaf: basal rosetted, entire to dentate or pinnately lobed; cauline petioled or sessile, base not lobed. Inflorescence: elongated or not. Flower: sepals erect, forming a tube, linear to narrowly oblong, lateral pair base sac-like; petals tongue-shaped, long-clawed, white to lavender. Fruit: silicle, indehiscent, flattened perpendicular to septum, spectacle-shaped, splitting into 1-seeded halves, not segmented; valves keeled, enclosing seeds; stigma entire. Seed: 2, oblong, wing 0.
2 species: California, Mexico. (Greek: 2 shields, reference to spectacle-shaped fruit) [Rollins 1979 Publ Bussey Inst Harvard 3–32]

Key to Dithyrea

D. maritima (Davidson) Davidson BEACH SPECTACLEPOD
NATIVE
Plant rhizomed; densely hairy. Stem: decumbent, several to many from base, simple or few-branched distally, 1–2.1 dm. Leaf: basal 2–11(14) cm, widely ovate to oblanceolate, wavy to dentate; distal cauline short-petioled to sessile, entire or wavy. Flower: sepals (6)7–10 mm; petals 1.2–1.5 cm, 2.5–3.5 mm wide, white to ± purple. Fruit: pedicel spreading, 1.5–2.5 mm. Seed: 2, 3–4 mm, oblong.
2n=60. Seashores, coastal sand dunes; < 50 m. s Central Coast, South Coast, Channel Islands; Baja California. Mar–Aug [Online Interchange] {CNPS list}

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 31 2014
Citation for this treatment: [Author of taxon treatment] 2013. Dithyrea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23181, accessed on Oct 31 2014

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click for enlargement Dithyrea maritima
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1984 California Native Plant Society

Geographic subdivisions indicated for the distribution of Dithyrea maritima Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.