Helianthus niveus subsp. tephrodes (A.Gray) Heiser

Algodones sunflower (en)

Subspecies

Angiosperms > Asterales > Asteraceae > Helianthus > Helianthus niveus

Characteristics

Annuals or perennials, 50–150 cm (taproots stout). Stems erect or decumbent, sericeo-villous (hairs white). Leaves mostly cauline; mostly alternate; petioles 1.5–3.5 cm; blades deltate or deltate-ovate, 3–7 × 2–4 cm, bases cuneate, margins entire or serrulate, abaxial faces densely sericeous, gland-dotted. Heads 1–3. Peduncles 4–17 cm. Involucres hemispheric, 8–28 mm diam. Phyllaries 18–21, lanceolate, 8–10 × 1–3.5 mm, apices shortly attenuate, abaxial faces densely white-canescent. Paleae 8–11 mm, subentire to 3-toothed. Ray florets 10–13; laminae 16–25 mm. Disc florets 50+; corollas 4.5–6 mm, lobes reddish; anthers brownish red, appendages reddish (style branches reddish). Cypselae 4–8 mm, ± villous; pappi of 2(–3) lanceolate scales 1.5–3 mm plus 2–4 obtuse scales 0.5–1 mm. 2n = 34.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.5 - 1.5
Root system tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity 3-7
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 6-11

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 10 - 14
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Helianthus niveus subsp. tephrodes world distribution map, present in Mexico and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:119192-2
WFO ID wfo-0000032934
COL ID 5HM4X
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Viguiera tephrodes Helianthus tephrodes Helianthus niveus subsp. tephrodes Helianthus niveus var. tephrodes