font settings and languages

Font Size: Large | Normal | Small
Font Face: Verdana | Geneva | Georgia
Languages:

Helianthella quinquenervis

(Fivenerve Helianthella)

Overview

[ Back to top ]

Interesting Facts

[ Back to top ]
 

Common Names

[ Back to top ]

Common Names in English:

Fivenerve Helianthella, Nodding Dwarf-Sunflower, Nodding Helianthella, Nodding Rockrose

Description

[ Back to top ]

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]

Physical Description

Species Helianthella quinquenervis

Plants (30-) 50-150 cm. Cauline leaves: largest proximal to mid stems; blades usually 3- or 5-nerved, elliptic or ovate-lanceolate to lanceolate, 10-50 cm, faces sparsely hirsute or glabrous . Heads usually borne singly, ± nodding . Involucres hemispheric or broader, (25-) 40-50 mm diam. Phyllaries (outer sometimes ± foliaceous ) ovate to lanceolate (subequal to unequal, margins ciliate ). Paleae scarious , relatively soft. Ray florets (13-) 21; (corollas bright yellow) laminae 25-30(-40) mm. Disc corollas yellow. Cypselae strongly compressed , narrowly obovate (margins ciliate, faces strigose ) ; pappi of 2 ± subulate scales plus 2-4+ shorter scales. [source]

Habit: Forb/herb

Flowers: Bloom Period: June, July, August, September, October.

Habitat

Moist meadows, aspen glades ; 1400-3600 m [2].

Biology

[ Back to top ]

Reproduction

Duration: Perennial

Taxonomy

[ Back to top ]

Synonyms

Helianthus quinquenervis Hook. • Helianthus quinquenervis Hooker • London J. Bot. 6: 247. 1847

Notes

Name Status: Accepted Name .

Comment: Data Providers: CONABIO, IPNI, Tropicos. GCC LSID: urn :lsid:compositae.org:names:75229E63-E25C-45AF-A5FF-4FEBAA89324B

Last scrutiny: 13-Aug-09

Similar Species

[ Back to top ]

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

[ Back to top ]

Further Reading

[ Back to top ]

Notes

[ Back to top ]

Contributors

Data Sources

Accessed through GBIF Data Portal February 16, 2008:

Identifiers

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]
  2. "Helianthella quinquenervis". in Flora of North America Vol. 21 Page 114, 115, 116. Oxford University Press. Online at EFloras.org. [back]
Last Revised: 7/15/2012