Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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.
Perennial, generally ± tomentose
Leaves basal and cauline, alternate, spiny, dentate to 1–3-pinnately lobed
Inflorescence: heads discoid, many, 1-flowered, sessile in spheric 2° heads; 1° involucre elliptic, subtended by bristles; phyllaries in several overlapping series; receptacle obconic, chaffy; 2° heads peduncled; 2° involucre bracts reflexed
Flowers 1 per 1° head; corollas white to blue; anther bases sharply tailed, tips narrowly triangular, acute; style with ring of minute hairs just below oblong branches
Fruit ± cylindric, 4-angled, hairy; pappus of many, short scales
Species in genus: ± 100 species: Medit, Eurasia
Etymology: (Greek: hedgehog-like)
| Introduced |
Plants 1–2 m
Stems simple to much-branched, glandular and ± tomentose
Leaves oblong-elliptic; base clasping; upper surface green, glandular; lower surface cobwebby-tomentose; lobes lanceolate to triangular
Inflorescence: 1° involucre 15–25 mm, 1° phyllary tips expanded, fringed, spine-tipped, ± glandular; 2° heads 3–6 cm diam
Flowers: corolla tube long, throat very short, lobes ± linear
Fruit 7–8 mm, densely appressed-hairy; pappus scales 1–1.5 mm, ciliate, ± fused
Chromosomes: 2n=32
Ecology: Disturbed places
Elevation: ± 1300 m.
Bioregional distribution: Modoc Plateau
Distribution outside California: native to Eurasia
Sometimes cultivated.
| 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). |
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