Jepson Flora Project: Jepson Interchange    

 
link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • 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.

DITHYREA

SPECTACLE-POD

Annual, perennial herb; herbage hairs dense, stellate, multibranched
Leaves oblanceolate to widely obovate, entire to and shallowly dentate to lobed; basal and lower cauline petioled; middle and upper cauline petioles 0 or short
Inflorescence: bracts 0
Flower fragrant; sepals overlapped; petals erect, narrowly tongue-shaped, white to lavender
Fruit indehiscent, flat perpendicular to septum; 1-seeded halves ± round, each bordered by a raised rim; hairs simple, forked, club-like or not, especially dense on rim; pedicel < 3 mm, stout
Seed widely oblong, flat; wing 0; embryonic root at edges of both cotyledons
Species in genus: 2 species: CA, Mex
Etymology: (Greek: with 2 shields, from fruit)
Reference: [Rollins 1979 Publ Bussey Inst Harvard 3–32]

Native

D. californica Harv.

Annual canescent; bases of cauline leaves, pedicels with paired glands
Stems arising below leaf clusters, decumbent to erect, 1–7 dm; branches 0 below, sparse or 0 above
Leaves not fleshy, canescent; basal 3–15 cm, oblanceolate to widely obovate, dentate to shallowly lobed, tip obtuse; cauline 1–4 cm, widely oblong to ovate
Flower: petals 12–15 mm, prominently 3-veined, whitish to light lavender
Fruit: hairs simple, club-like or not; pedicel spreading
Seed 3–4 mm
Chromosomes: 2n=20
Ecology: Abundant. Sandy places, washes, scrub
Elevation: < 1400 m.
Bioregional distribution: Desert
Distribution outside California: w Arizona, nw Mexico
Flowering time: Mar–May
Horticultural information: TRY.

previous taxon | next taxon
bioregional map for DITHYREA%20californica being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Dithyrea californica
Retrieve dichotomous key for Dithyrea
Retrieve multiple-entry key (MEKA) for Dithyrea
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
Glossary


University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California