Grindelia havardii Steyerm.

Havard's gumweed (en)

Species

Angiosperms > Asterales > Asteraceae > Grindelia

Characteristics

Perennials (perhaps flowering first or second year), 30–50(–150) cm. Stems erect, stramineous to pinkish, usually villosulous to hirtellous and/or stipitate-glandular, sometimes glabrate. Cauline leaf blades mostly ovate to oblong, (7–)15–30(–55) mm, lengths 2–4 times widths, bases ± clasping, margins crenate (teeth mostly 3–5 per cm, blunt, resin-tipped), apices obtuse to acute, faces usually hirtellous and little, if at all, gland-dotted, sometimes glabrate (then gland-dotted). Heads borne singly or in open to crowded, corymbiform arrays. Involucres broadly urceolate to globose, 8–13 × 12–22 mm (often subtended by leaflike bracts). Phyllaries in 5–6 series, reflexed to spreading, linear to lanceolate, apices subulate to terete, ± recurved to straight (terminal setae incurved), moderately to strongly resinous. Ray florets 18–25; laminae 8–11 mm. Cypselae stramineous to light brown, (2–)3–3.5 mm, apices smooth to minutely coronate, faces smooth or striate (angles ± ribbed); pappi of 2 ± straight, usually smooth (apices usually dilated), setiform awns 4–7 mm, ± equaling disc corollas. 2n = 12.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 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 7-9
Soil humidity 1-5
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 5-11

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

Grindelia havardii world distribution map, present in Mexico and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:113522-2
WFO ID wfo-0000103226
COL ID 6KT3K
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Grindelia havardii