Grindelia oxylepis

Greene

Pittonia 4: 42. 1899.

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

Annuals (biennials), 20–55 cm. Stems erect, stramineous, glabrous. Cauline leaf blades obovate or oblong to spatulate, (5–)10–15(–30) mm, lengths 2–2.5(–5) times widths, bases ± clasping, margins crenate (teeth usually 7–9, sometimes 3–6, per cm, rounded to blunt, usually resin-tipped), apices obtuse to acute, faces glabrous, moderately gland-dotted. Heads in open, paniculiform arrays or borne singly. Involucres broadly urceolate, 7–10 × 8–16 mm. Phyllaries in 4–5 series, reflexed to spreading, ± lanceolate, apices recurved to nearly straight, subulate to acuminate, moderately to strongly resinous. Ray florets 20–30; laminae 7–9 mm. Cypselae brown, 1.5–3 mm, apices smooth or coronate, faces rugose; pappi of 2–3 straight, smooth or barbellulate (distally dilated), setiform awns 4–6 mm, shorter than or nearly equaling disc corollas. 2n = 12 (Mexico).


Phenology: Flowering (Apr–)Jun–Sep.
Habitat: Moist places, plains, valleys, fields
Elevation: 800–1600 m

Distribution

V20-983-distribution-map.gif

Tex., Mexico (Chihuahua, Coahuila, Durango, San Luis Potosí, Zacatecas).

Discussion

Selected References

None.

Lower Taxa

None.