Gutierrezia sphaerocephala A.Gray

Roundleaf snakeweed (en)

Species

Angiosperms > Asterales > Asteraceae > Gutierrezia

Characteristics

Annuals, 20–50 cm. Stems minutely, prominently, often sparsely, papillate-scabrous (hairs triangular or deltate to lanceolate, less than 0.1 mm). Leaves: proximal usually absent at flowering; cauline blades 1-nerved, linear, 0.5–1.2 mm wide, little reduced distally. Heads in loose arrays. Involucres campanulate, 2.5–5 mm diam. Phyllary apices flat. Ray florets 10–15; corollas yellow, 3–5.5 mm. Disc florets 18–37. Cypselae 0.9–1.2(–1.4) mm, faces without oil cavities, densely strigoso-sericeous in rows (hairs appressed to spreading, apices clavate); pappi of 1 series of narrowly triangular or narrowly oblong scales 0.2–1 mm (distinct or basally connate 1 / 4 – 3 / 4 their lengths, usually shorter in rays). 2n = 8 (10).
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2 - 0.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

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

Usage

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

Cultivation

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

Distribution

Gutierrezia sphaerocephala world distribution map, present in Mexico and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:210877-1
WFO ID wfo-0000005924
COL ID 8V8HS
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Gutierrezia eriocarpa Gutierrezia sphaerocephala Xanthocephalum sphaerocephalum Gutierrezia coulteri Xanthocephalum sphaerocephalum var. eriocarpum