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.
, 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
, lanceolate, lance-linear
, ovate-lanceolate, or spatulate
, bases mostly cuneate, margins
. Heads radiate
, borne singly or (2-15+) in corymbiform
arrays. Involucres campanulate
or broader, 10-50 mm diam. Phyllaries persistent
, 22-32+ in ± 3 series (mostly deltate-ovate or ovate to lanceolate, linear, or oblong
or unequal, outer sometimes foliaceous
). Receptacles ± convex
, paleate (paleae falling with cypselae, conduplicate
). Ray florets 8-21, neuter
; corollas ± yellow. Disc florets 30-200+, bisexual
; corollas yellow or purple to brown, tubes
shorter than or equaling throats
5, deltate (abaxially hairy). Cypselae (brownish) ± compressed
(margins usually ± winged
, usually ± ciliate
, faces glabrous or strigose
) ; pappi 0, or persistent, of 2 ± subulate
plus 0-4+ shorter, lacerate
scales (sometimes all ± connate
). x = 15.
Species 9: w North America, n Mexico.
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Brongniart, 1843
- Takhtajan, 1967
- Superorder: Campanulanae () - Takhtajan Ex Reveal, 1992
- Subclass: Asteridae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
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)
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- A manual of organic materia medica and pharmacognosy; an introduction to the study of the vegetable kingdom and the vegetable and animal drugs (with syllabus of inorganic remedial agents) comprising the botanical and physical characteristics, source, con Philadelphia, Blakiston url p. 424, p. 592.
- Flora of the southeastern United States; being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolina, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana, and in Oklahom by John Kunkel Small. New York, The author, 1913. url p. 1271.
- Flora of the southern United States: containing an abridged description of the flowering plants and ferns of Tennessee, North and South Carolina, Georgia, Alabama, Mississippi, and Florida: arranged according to the natural system. Cambridge, Mass., Cambridge Botanical Supply Co., 1897. url p. 254.
- Manual of the southeastern flora: being descriptions of the seed plants growing naturally in Florida, Alabama, Mississippi, eastern Louisiana, Tennessee, North Carolina, South Carolina and Georgia. 1933 New York: The author, 1933. url p. 1442.
- Proceedings of the American Academy of Arts and Sciences. Boston: Metcalf and Co., 1846-1958 url p. 520.
- Small, J. K. Flora of the southeastern United States;being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolin, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana and the Indian territory and in Oklahoma and Texas east of the one-hundredth meridian /by John Kunkel Small. .. 1903 New York: The author, 1903. url p. 1271.
- The Tennessee flora; with special reference to the flora of Nashville. Phaenogams and vascular cryptogams, by August Gattinger. Nashville, Tenn.The author, 1887. url p. 16.
- The flora of Tennessee and a philosophy of botany: respectfully dedicated to the citizens of Tennessee / by Augustin Gattinger. Nashville: Press of Gospel Advocate Pub. Co., 1901. url p. 171.
- Transactions of the. .. annual meetings of the Kansas Academy of Science. Topeka, Kan.: Kansas Pub. House, 1883-1901. url p. 134.
- 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.