Habit: Shrub, unarmed.
Stem: branched, erect to prostrate, < 4 m, +- red becoming gray; nodes swollen, darker; hairs 0 or appressed.
Leaf: stipules persistent; leaflets 2, fused at base.
Inflorescence: flowers 1 in axils.
Flower: sepals unequal, overlapping, deciduous; petals clawed, twisted, yellow, deciduous; stamen appendages bract-like, coarsely toothed.
Fruit: 5-lobed, spheric, short-stalked, hairy, splitting into 5 hairy, 1-seeded nutlets.
Species In Genus: 5 species: warm, dry America.
Etymology: (Juan Antonio Pérez Hernández de Larrea, Bishop of Valladolid, Spain, 1730--1803)
Jepson eFlora Author: Duncan M. Porter
Reference: [Lia et al. 2001 Molec Phylogen Evol 21:309--320]
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
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