Jepson Flora Project: Jepson Interchange    

 
link to manual 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.

ASTERACEAE

SUNFLOWER FAMILY

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.

PERITYLE

Annual, perennial herb, subshrubs, shrubs
Leaves opposite or alternate, simple to deeply divided or compound, sessile or petioled
Inflorescence: heads radiate, discoid or disciform, solitary or in cymes; peduncles short or long; involucre cylindric, hemispheric, or bell-shaped; phyllaries in 2–3 ± equal series, linear to ovate; receptacle flat to conic, naked
Ray flowers: ligules yellow or white
Disk flowers many; corollas yellow or white, 4-lobed; anther tips triangular; style tips tapered
Fruit linear to oblanceolate, very flat, sometimes weakly 3–4-angled; surface dark brown or black, glabrous or puberulent; margins generally ± thick, puberulent to strongly ciliate; pappus 0 or a crown of fringed scales and 0–2 slender bristles
Species in genus: ± 75 species: sw North America
Etymology: (Greek: around the margin, from thick fruit margin)
Reference: [Powell 1974 Rhodora 76:229–306]
Horticultural information: STBL.

Native

P. megalocephala (S. Watson) J.F. Macbr.

Subshrub 15–55 cm, short-rough-hairy
Stems many, much-branched
Leaves generally alternate; petiole 1–6 mm; blade 7–15 mm, 1–10 mm wide, linear to widely ovate, tip acute to obtuse, margin generally entire, rarely serrate or lobed
Inflorescence: heads discoid, 1–few, loosely clustered; peduncles generally 1–5 cm, bracts leaf-like; involucre 3.5–7.5 mm diam, bell-shaped; phyllaries 14–19, 5–6 mm, lanceolate or oblong
Ray flowers 0
Disk flowers: corollas 3.5–4.2 mm
Fruit 2.5–3 mm; 1 or both surfaces rounded or ± angled, puberulent; margin hairy; pappus 0 or a crown of vestigial scales, rarely with 1 bristle
Ecology: Rocky places
Elevation: 1300–2800 m.
Bioregional distribution: White and Inyo Mountains, Desert Mountains
Distribution outside California: Nevada

previous taxon | next taxon
bioregional map for PERITYLE%20megalocephala 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 Perityle megalocephala
Retrieve dichotomous key for Perityle
Retrieve multiple-entry key (MEKA) for Perityle
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
Return to the Jepson Interchange main page
Return to treatment index page
Glossary
    FEEDBACK
  • This page is no longer being maintained.


University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California