Habit: Annual from taproot; branches many, slender, ascending from base.
Stem: nearly naked proximally, densely leafy distally.
Leaf: cauline, alternate, mostly closely spaced at stem tips, entire.
Inflorescence: flowers 1 in axils.
Flower: opening at dawn; sepals (3)4, reflexed separately or in pairs; petals (3)4, yellow, fading yellow; stamens (4)8, longer ones opposite sepals, anthers attached at middle, pollen grains 3-angled except in polyploid taxa (visible with hand lens); stigma hemispheric, > anthers and cross-pollinated or +- = anthers and self-pollinated.
Fruit: sessile, 0.5--1 cm, +- straight, strongly flattened, walls +- swollen by seeds.
Seed: in 1 row per chamber, narrowly obovoid, smooth, shiny, dots or blotches 0.
Species In Genus: 2 species: northeastern California, Nevada, central Utah, British Columbia, Alberta.
Etymology: (Arthur H. Holmgren (1912--1992), Noel H. Holmgren (b. 1937), and Patricia K. Holmgren (b. 1940))
Note: Incl in
Camissonia in TJM (1993).
Jepson eFlora Author: Warren L. Wagner
Reference: Wagner & Hoch 2009 Novon 19:130--132
Unabridged Reference: Raven 1969 Contr US Natl Herb 37:161--396; Wagner et al. 2007 Syst Bot Monogr 83:1--240Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
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