Jepson Interchange (more information)
Print edition is available from the University of California Press
|
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 |
|
|
TREATMENT FROM THE JEPSON MANUAL |
previous taxon |
next taxon
Jepson Interchange (more information) |
|
©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.
Annual
Stems erect
Leaves alternate, toothed or pinnately lobed
Inflorescence: heads radiate, peduncled; phyllaries in 2–3 series, overlapping, scarious-margined; receptacle flat to convex or conic, naked
Ray flowers: ligules generally yellow or white
Disk flowers many; corollas yellow; anther tips ovate, bases rounded or ± cordate; style branches truncate with shrub-like tips
Fruit: ray achenes 3-angled, wings present or 0; disk achenes ± cylindric, pappus 0 or a narrow crown
Species in genus: ± 5 species: Medit
Etymology: (Greek: gold flower)
Reference: [Haw 1986 The Garden 111(11):525–528; Humphries 1976 Bull Brit Mus Bot 5:147–240]
See also Argyranthemum, Leucanthemum, Tanacetum.
| Introduced |
Stems stiffly branched from base, > 10 dm
Leaves < 6 cm, obovate, sessile, 2-pinnately lobed almost to midrib
Inflorescence: heads solitary, < 4 cm diam; phyllaries generally in 3 series, obovate, not keeled, margins transparent
Ray flowers < 15; ligules yellow
Disk flowers: corollas 14–15 mm, yellow
Fruit: ray achenes < 3 mm, 3-angled, winged; disk achenes ± 2.5 mm, angled and ribbed, pappus 0
Chromosomes: 2n=18
Ecology: Common escape from cultivated in urban coastal areas, vacant lots, roadsides, waste ground
Elevation: < 200 m.
Bioregional distribution: Central Coast, South Coast, expected more widely
Distribution outside California: native to s Europe
| 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). |
|