gumweed

Grindelia squarrosa

gumweed - Grindelia squarrosa 06AU14-02
gumweed - Grindelia squarrosa 06JL24

characteristics

Erect, bushy, short-lived perennial with green, slightly cupped, shiny, toothed leaves. Flowers — both ray and disk — are bright yellow with curling scales beneath. Aptly named for the sticky resinous substance covering the flower buds prior to opening. Slightly odorous. Often grows in patches. Can be invasive.
A member of the aster family.

T SSN H W sun soil H2O fire N2 pH summer fall flower (seed)
P W 0.8 0.6 S F-M-C DM - - - green brown yellow

habitat

Roadsides, saline flats, disturbed sites.

uses

North American aboriginals used the flowers and leaves for treating bronchitis & asthma and as a wash for healing sores.

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common > name = have on site
T = type: A = annual | B = biennial | P = perennial | SS = subshrub | D = deciduous | C = coniferous
██ = cold stratify | ██ = cold stratify & scarify | ██ = plant directly | ██ = scarify | ██ = not from seed
SSN = season: C = cool | W = warm | Y = late
H = height (in metres) | W = width (in metres) | B = bunch | S = sod | SB = sod/bunch
sun: S = full sun | S/PS = sun or partial shade | PS = partial shade | SH = full shade
soil: F = fine | M = medium | C = coarse
H2O = moisture requirement: D = dry | M = moist | W = wet | Z = aquatic
fire = fire tolerance: - = unknown | X = none | • = some | •• = moderate | ••• = high tolerance
N2 = nitrogen fixing: • = yes
summer = foliage colour | fall = foliage (stem) colour | flower (seed) = flower (seed / fruit) colour, if conspicuous
pH = acidity - alkalinity