Helianthella californica var. nevadensis

• Interesting Facts
• Common Names
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Common Names

Description

Family Compositae

The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.

Genus Helianthella

Perennials , 20-150 cm. Stems erect , usually branched. Leaves basal and cauline; opposite (proximal ) and alternate; usually petiolate (at least proximal) ; blades (usually 3- or 5-nerved from at or near bases ) elliptic , lanceolate, lance-linear , linear , oblanceolate , ovate , ovate-lanceolate, or spatulate , bases mostly cuneate, margins entire, faces glabrous or hairy . Heads radiate , borne singly or (2-15+) in corymbiform arrays. Involucres campanulate to hemispheric or broader, 10-50 mm diam. Phyllaries persistent , 22-32+ in ± 3 series (mostly deltate-ovate or ovate to lanceolate, linear, or oblong , subequal or unequal, outer sometimes foliaceous ). Receptacles ± convex , paleate (paleae falling with cypselae, conduplicate , scarious or chartaceous ). Ray florets 8-21, neuter ; corollas ± yellow. Disc florets 30-200+, bisexual , fertile ; corollas yellow or purple to brown, tubes shorter than or equaling throats , lobes 5, deltate (abaxially hairy). Cypselae (brownish) ± compressed , obovate to obcordate (margins usually ± winged , usually ± ciliate , faces glabrous or strigose ) ; pappi 0, or persistent, of 2 ± subulate scales plus 0-4+ shorter, lacerate scales (sometimes all ± connate ). x = 15.

Species 9: w North America, n Mexico.[1]

Taxonomy

Synonyms

Helianthella californica A. Gray var. nevadensis (Greene) Jeps. • Helianthella nevadensis Greene

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Similar Species

Members of the genus Helianthella

ZipcodeZoo has pages for 12 species, subspecies, varieties, forms, and cultivars in this genus:

H. californica (California Helianthella) · H. californica Gray var. shastensis W.A.Weber (Shasta Helianthella) · H. californica var. californica (California Helianthella) · H. californica var. nevadensis (Nevada Helianthella) · H. californica var. shastensis (Shasta Helianthella) · H. castanea (Diablo Rock-Rose) · H. microcephala (Purpledisk Helianthella) · H. parryi (Dwarf Rockrose) · H. quinquenervis (Fivenerve Helianthella) · H. uniflora (Oneflower Helianthella) · H. uniflora var. douglasii (Douglas' Helianthella) · H. uniflora var. uniflora (Oneflower Helianthella)

More Info

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Further Reading

• Weber, W. A. 1948. The genus Helianthella in Oregon. Madroño 9: 186-189.
• Weber, W. A. 1952. The genus Helianthella (Compositae). Amer. Midl. Naturalist 48: 1-35.

Notes

Contributors

• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.

Identifiers

• Catalogue of Life Accepted Name Code: ITS-528357
• Global Biodiversity Information Facility Taxonkey: 13898675
• Globally Unique Identifier: urn:lsid:ipni.org:names:118884-2
• Zipcode Zoo Species Identifier: 1502734

Footnotes

1. William A. Weber "Helianthella". in Flora of North America Vol. 21 Page 65, 66, 67, 114. Oxford University Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.