Heterotheca oregona var. compacta

(D. D. Keck) Semple

Brittonia 39: 382. 1987.

Basionym: Chrysopsis oregona var. compacta D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 237. Mentioned on page 236.
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Stems usually branched proximally, moderately to densely hispid, sparsely stipitate-glandular. Leaves gray-green, mid cauline averaging 19.2 × 4.2 mm (9–29 × 2.6–4.1 mm), faces long-villous, moderately to densely hispid (more than 5 hairs/mm²), not obviously stipitate-glandular. Outer phyllaries lanceolate. 2n = 18.


Phenology: Flowering Jul–Oct.
Habitat: Sandy and rocky soils, dry areas away from streams, openings in oak and conifer woodlands, disturbed roadbanks
Elevation: 200–1000+ m

Discussion

Variety compacta has leaf hairs sufficiently dense to give the plants a gray-green to even whitish appearance; the plants are therefore similar to individuals of Heterotheca echioides, which is radiate. It occurs scattered in the Klamath, Cascade, and Coastal Range mountains of northern California.

Selected References

None.

Lower Taxa

None.
John C. Semple +
(D. D. Keck) Semple +
Chrysopsis oregona var. compacta +
200–1000+ m +
Sandy and rocky soils, dry areas away from streams, openings in oak and conifer woodlands, disturbed roadbanks +
Flowering Jul–Oct. +
Chrysopsis oregona +
Heterotheca oregona var. compacta +
Heterotheca oregona +
variety +