Microseris douglasii subsp. douglasii

Common names: Douglas’s silverpuffs
IllustratedEndemic
Synonyms: Microseris attenuata Greene Microseris parishii Greene Microseris platycarpha var. parishii (Greene) H. M. Hall
Treatment appears in FNA Volume 19. Treatment on page 344.

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.


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

Discussion

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.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

acute;acuminate +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Kenton L. Chambers +
(de Candolle) Schultz-Bipontinus +
decurrent +
Calaïs douglasii +
compound +  and simple +
linear;oblanceolate +
3 cm30 mm <br />0.03 m <br /> (25 cm250 mm <br />0.25 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
filiform +
Douglas’s silverpuffs +
zygomorphic +, actinomorphic +  and (3-)5-merous +
white +  and yellow +
surpassing phyllaries +  and equaling +
purplish-spotted +, gray +  and brown or purplish +
Calif. +  and Oreg. +
10–800 m +
black-villous +  and scurfy-puberulent +
winged +  and beaked +
dispersed +
Clay soils, flats and hillsides, often by vernal pools or near serpentine outcrops, grasslands and open oak and Pinus sabiniana woodlands +
indeterminate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (3 cm30 mm <br />0.03 m <br />) +
globose;fusiform +
0.7 cm7 mm <br />0.007 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
lobed +  and dentate +
scurfy-puberulent +  and glabrous +
2-carpellate +
white +  and yellow brown or blackish +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
curved-ascending +  and erect +
Flowering Mar-–Jun. +
connate +  and distinct +
5 +  and 40 +
Jahresber. Pollichia +
flat;low-convex +
10 +  and 15 +
flared +
constricted +
linear +, orbiculate +, ovate +, oblong +, lanceolate +  and deltate +
silvery;yellowish brownish or blackish +
5 +  and 30 +
orbiculate +  and lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
exalbuminous +
Illustrated +  and Endemic +
many-branched +  and simple +
scurfy +  and glabrous +
few +, 1 +  and 30 +
appendaged +  and truncate +
papillate +
Microseris attenuata +, Microseris parishii +  and Microseris platycarpha var. parishii +
Microseris douglasii subsp. douglasii +
Microseris douglasii +
subspecies +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
shrub +  and subshrub +