familyAsteraceae
genusMicroseris
speciesMicroseris douglasii
subspeciesMicroseris douglasii subsp. platycarpha
Microseris douglasii subsp. platycarpha
Contr. Dudley Herb. 4: 296. 1955.
Common names: San Diego silverpuffs
Basionym: Calaïs platycarpha A. Gray in War Department [U.S.], Pacif. Railr. Rep. 4(5): 113. 1857
Synonyms: Microseris platycarpha (A. Gray) Schultz-Bipontinus
Treatment appears in FNA Volume 19. Treatment on page 344.
Cypselae columnar to obconic, 3–4.5 mm (tapered to basal callosities, filled by embryos) ribs slightly flared apically; pappi of orbiculate to lanceolate, involute, arcuate (glabrous) scales 2.5–7 mm, 0.5–2 mm longer than cypselae. 2n = 18.
Phenology: Flowering Mar–-May.
Habitat: Clay soil, mesa flats, hillsides, sometimes near vernal pools, grasslands, southern coastal scrub and Engelmann oak woodlands
Elevation: 10–1100 m
Distribution
Calif., Mexico (Baja California).
Discussion
Subspecies platycarpha is cited as severely declining in abundance because of urban development (D. P. Tibor 2001). It replaces subspp. tenella and douglasii in southwestern California and northern Baja California.
Selected References
None.
Lower Taxa
None.
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