Jepson Flora Project: Jepson Interchange    

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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.



David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)4–5; stamens 4–5, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):1–28. See glossary p. 25 for illustrations of general family characteristics.


Dale E. Johnson

Annual, ± woolly
Leaves alternate, entire to pinnately lobed
Inflorescence: heads solitary, radiate; involucre bell-shaped or hemispheric; phyllaries in 1 series, equal, fused at base, margins sometimes translucent; receptacle conic or hemispheric, naked
Ray flowers 1 per phyllary; ligules 5–10 mm, ± ovate, yellow, tip entire or slightly toothed
Disk flowers yellow; bases long-hairy
Fruit oblanceolate, 3–4-angled, ± compressed front-to-back; pappus 0
Species in genus: 3 species: CA
Etymology: (Greek: false Bahia )
Reference: [Johnson 1991 Novon 1:119–124]


P. peirsonii Munz


Plants 2–7 dm
Leaves 2–6 cm, triangular-ovate, generally 2-pinnately lobed; segments 1–5 mm wide
Inflorescence: peduncles 2–8 cm; involucre 6–9 mm; phyllaries ± 8, oblanceolate, fused at base; receptacle rounded-conic
Disk flowers ± 3 mm; lobes sparsely glandular
Fruit ± 3 mm
Chromosomes: 2n=16
Ecology: Grassland, bare dark clay
Elevation: 100–800 m.
Bioregional distribution: s Sierra Nevada Foothills (Kern Co.), se San Joaquin Valley (Fresno, Tulare cos.).Some ray flower tips reflect ultraviolet light. Threatened by agriculture, flood control.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for PSEUDOBAHIA%20peirsonii being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Pseudobahia peirsonii
Retrieve dichotomous key for Pseudobahia
Retrieve multiple-entry key (MEKA) for Pseudobahia
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
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