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Key to families | Table of families and genera
Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
Shrub. Leaf: ± clustered on short-shoots, simple, persistent or drought-deciduous, generally deeply 3–9-lobed, generally with ± sunken glands adaxially, margin generally not toothed, ± strongly rolled under; bases persistent, overlapping, sheathing stem. Inflorescence: flowers generally 1 on short-shoots. Flower: hypanthium ± funnel-shaped, outside hairy, partly glandular or not, bractlets small, lanceolate; sepals 5, overlapping; petals 5, white to cream [yellow]; stamens (15)20–80(125); pistils 1–7(10), simple. Fruit: achene, ± fusiform to oblong, styles persistent, ± hairy.
6 species: southwestern United States, northern Mexico. (Frederick T. Pursh, North American botanist, 1774–1820)
Unabridged etymology: (Frederick T. Pursh, North American botanist, author of Flora Americae Septentrionalis, 1774–1820)
Unabridged references: [Koehler & Smith 1981 Madroño 28:13–25; Henrickson 1986 Phytologia 60:468]
1. Pistils (3)4–7(10); styles in fruit 20–60 mm, plumose; leaf lobes (3)5(7), central not spiny at tip ..... P. stansburyana
1' Pistils 1–2; styles in fruit 5–7(10) mm, not plumose; leaf lobes 3(5), central generally spiny at tip ..... P. tridentata
2. Leaves adaxially sparsely nonglandular-hairy, sessile or sunken glands few to many; twig hairs generally glandular ..... var. glandulosa
2' Leaves adaxially densely nonglandular-hairy, sessile or sunken glands 0–few; twig hairs generally nonglandular ..... var. tridentata
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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