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FNA | Family List | FNA Vol. 19, 20 and 21 | Asteraceae | Microseris

7a. Microseris douglasii (de Candolle) Schultz-Bipontinus subsp. douglasii

Douglas’s silverpuffs

Microseris attenuata Greene; M. parishii Greene; M. platycarpha (A. Gray) Schultz-Bipontinus var. parishii (Greene) H. M. Hall

Cypselae columnar, 4–10 mm (tapered to basal callosities, filled by embryos or distal 1/4–1/2 empty), ribs slightly flared apically, slightly constricted below flaring; pappi of orbiculate to lanceolate, arcuate, involute (glabrous or villous) scales 1–6.5 mm, usually 1–6 mm shorter than cypselae. 2n = 18.

Flowering Mar-–Jun. Clay soils, flats and hillsides, often by vernal pools or near serpentine outcrops, grasslands and open oak and Pinus sabiniana woodlands; 10–800 m; Calif., Oreg.

Subspecies douglasii is the common subspecies away from the coast in cismontane California, north of the Transverse Ranges; it is relatively rare in southwestern California and southern Oregon. Some populations near the coast appear to be hybrids between it, or subsp. tenella, and Microseris bigelovii.


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