Helianthus atrorubens L.

Purpledisk sunflower (en)

Species

Angiosperms > Asterales > Asteraceae > Helianthus

Characteristics

Fibrous-rooted perennial from a very short, stout rhizome or crown; stems mostly solitary, 0.5–2 m, usually conspicuously spreading-hairy, at least below; lvs nearly all opposite, 3–8 pairs below the infl, commonly hairy on both sides, especially on the main veins beneath, lance-ovate to sometimes broadly ovate, mostly (1.3–)1.7–2.5(–3) times as long as wide, abruptly contracted to the petiole, the largest ones near the base, these commonly 6–20(–25) cm, toothed; petioles tending to be conspicuously wing-flared upward, often conspicuously spreading-hairy, the lower generally 1/3 to fully as long as the blade; heads several on long, naked peduncles in a corymbiform infl; disk red-purple, 1–1.5(–2) cm wide; invol bracts evidently imbricate, broad, firm, appressed, mostly oblong or elliptic, rounded to acutish, sometimes with an abrupt, very short acumination, 2.5–4(–5) mm wide, ciliolate, otherwise glabrous or nearly so; rays 10–15, 1–3 cm; pappus without accessory scales; 2n=34. Dry, open woods; basically Appalachian and Atlantic, from Va. and e. Ky. to c. Ga. and Ala., w. to w. Tenn. and se. La. July–Oct.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 1.5 - 2.5
Mature height (meter) 1.0 - 2.0
Root system fibrous-root rhizome
Rooting depth (meter) -
Root diameter (meter) 0.5
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 5-9
Soil humidity 3-7
Soil texture -
Soil acidity 4-8
Soil nutriment -
Hardiness (USDA) 6-8

Usage

Uses environmental use gene source material
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions.
Mode divisions
Germination duration (days) 10 - 14
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Helianthus atrorubens unspecified picture

Distribution

Helianthus atrorubens world distribution map, present in Turkmenistan and United States of America

Conservation status

Helianthus atrorubens threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:329242-2
WFO ID wfo-0000138864
COL ID 6LHNF
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Helianthus sparsifolius Helianthus atrorubens Discomela sparsiflorus Discomela atrorubens Helianthus atrorubens subsp. atrorubens Helianthus atrorubens var. alsodes