TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
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.-->

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Staria S. Vanderpool

Annual, shrub, tree, ill-smelling
Leaves generally 1-palmate, generally alternate, generally petioled; stipules generally minute, often bristle-like or hairy; leaflets 3–7
Inflorescence: raceme, head, or flowers solitary, generally longer in fruit; bracts generally 3-parted below, simple above, or 0
Flower generally bisexual, radial to ± bilateral; sepals generally 4, free or fused, generally persistent; petals generally 4, free, ± clawed; stamens generally 6, free, exserted, anthers generally coiling at dehiscence; ovary superior, generally on stalk-like receptacle, chamber generally 1, placentas generally 2, parietal, style 1, persistent, stigma generally minute, ± head-like
Fruit: generally capsule, septicidal; valves generally 2, deciduous, leaving septum (frame-like placentas) behind; pedicel generally ± reflexed to spreading
Genera in family: 45 genera, 800 species: widespread tropical to arid temp; some cultivated (Capparis spinosa , caper bush)
Reference: [Ernst 1963 J Arnold Arbor 44:81–93]
CA members placed in subfamily Cleomoideae. Alternate family name: Capparidaceae.


Species in genus: 1 sp
Etymology: (Greek: sharp style)


O. lutea Torr. & Frémont

Annual, ± glabrous
Stem branched from base, 5–15 dm
Leaf: petiole 2.5–7 cm; leaflets 3, 2–6 cm, ± elliptic, thick, firm
Inflorescence: head, 0.5–3 cm, axillary, ± spheric, dense, ± sessile, not elongating in fruit; pedicels 1–3 mm, thicker and reflexed in fruit
Flower radial; sepals free, 1–2 mm, lanceolate, green; petals 2–3 mm, elliptic, straw-yellow, ± sessile; stamens 3–5 mm, yellow, anthers 1–1.2 mm; ovary 1–1.5 mm, ± sessile, lobes 2, nearly separate, each 1-ovuled; style 2–3 mm, wide, fleshy at base
Fruit: nutlets 2, 2.5 mm, ± spheric, smooth, white to deep purple; receptacle < 2 mm, ± stalk-like; style 4–11 mm, stiff, spine-like
Seed 1 per nutlet
Chromosomes: 2n=20,40
Ecology: Rocky or sandy alkaline flats
Elevation: > 600 m.
Bioregional distribution: Mojave Desert
Distribution outside California: w Nevada (Amargosa Desert)
Flowering time: Mar–Oct

previous taxon | next taxon
bioregional map for OXYSTYLIS%20lutea being generated

Retrieve Jepson Interchange Index to Plant Names entry for Oxystylis lutea
Retrieve dichotomous key for Oxystylis
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions
Return to treatment index page
University & Jepson Herbaria Home Page | Copyright © by the Regents of the University of California