Microseris laciniata subsp. leptosepala

(Nuttall) K. L. Chambers

Contr. Dudley Herb. 5: 61. 1957.

Common names: Slender-bracted silverpuffs
Endemic
Basionym: Scorzonella leptosepala Nuttall Trans. Amer. Philos. Soc., n. s. 7: 426. 1841
Synonyms: Microseris leptosepala (Nuttall) A. Gray
Treatment appears in FNA Volume 19. Treatment on page 342. Mentioned on page 341, 343.

Stems usually branched. Leaves linear to narrowly lanceolate, entire or pinnately lobed. Outer phyllaries rarely purple-spotted, linear to lanceolate or deltate, smallest 0.5–2.5 mm wide, apices (erect) acute to acuminate, abaxial faces often scurfy-puberulent and black-villous. Pappi of 5–10, white, glabrous, aristate scales 0.5–2.5 mm, aristae usually barbellulate, rarely barbellate. 2n = 18.


Phenology: Flowering May–Aug.
Habitat: Clay, loam, and gravelly, sometimes serpentine-derived soils, open sites, meadows, hillsides, pine, oak and mixed evergreen woods
Elevation: 30–2000 m

Discussion

Subspecies leptosepala is known from the Klamath Mountains of California and Oregon and rare northward. It also occurs, intergrading with subsp. laciniata, in the California North Coast Range and east of the Cascade Range in central Oregon and northeastern California. It intergrades with subsp. siskiyouensis in the valleys of the Illinois and Smith rivers, southwestern Oregon and adjacent California (K. L. Chambers 2004b).

Selected References

None.

Lower Taxa

None.
Kenton L. Chambers +
(Nuttall) K. L. Chambers +
Scorzonella leptosepala +
Slender-bracted silverpuffs +
Calif. +, Oreg. +  and Wash. +
30–2000 m +
Clay, loam, and gravelly, sometimes serpentine-derived soils, open sites, meadows, hillsides, pine, oak and mixed evergreen woods +
Flowering May–Aug. +
Contr. Dudley Herb. +
Microseris leptosepala +
Microseris laciniata subsp. leptosepala +
Microseris laciniata +
subspecies +