Grindelia grandiflora

Hooker

Bot. Mag. 78: plate 4628. 1852.

Treatment appears in FNA Volume 20. Treatment on page 428. Mentioned on page 426.

Annuals, 50–150(–200) cm. Stems erect, stramineous, glabrous. Cauline leaf blades oblanceolate or lanceolate to linear, 25–40(–60) mm (distal smaller, ± appressed), lengths mostly 4–6 times widths, bases ± clasping, margins ± crenate (teeth mostly 9–15 per cm, rounded to obtuse or blunt, resin-tipped), apices acute to acuminate, faces glabrous, little, if at all, gland-dotted. Heads borne singly or in open, corymbiform arrays. Involucres broadly urceolate, 8–14 × 10–20+ mm. Phyllaries in 5–6 series, slightly spreading to appressed, linear to lance-attenuate or lanceolate, apices incurved to straight, filiform to subulate, slightly resinous. Ray florets 17–26; laminae 10–12 mm. Cypselae stramineous to reddish brown, 2–3+ mm, apices coronate to knobby, faces striate or furrowed; pappi of 2–4 straight, barbellulate or smooth (apices slightly dilated), setiform awns 3–4.5 mm, shorter than to nearly equaling disc corollas. 2n = 12.


Phenology: Flowering Aug–Oct.
Habitat: Stream banks, roadsides, ditches, grasslands, scrublands, open woodlands
Elevation: 300–1200 m

Distribution

V20-982-distribution-map.gif

Tex., Mexico (Coahuila, Nuevo León).

Discussion

Selected References

None.

Lower Taxa

None.