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.

"fine" is not a number.

black-villous +  and scurfy-puberulent +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Kenton L. Chambers +
(Nuttall) K. L. Chambers +
decurrent +
Scorzonella leptosepala +
compound +  and simple +
linear;broadly lanceolate +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
filiform +
Slender-bracted silverpuffs +
zygomorphic +, actinomorphic +  and (3-)5-merous +
purplish-spotted +, gray +  and brown or purplish +
Calif. +, Oreg. +  and Wash. +
30–2000 m +
scurfy-puberulent +  and glabrous +
winged +  and beaked +
dispersed +
Clay, loam, and gravelly, sometimes serpentine-derived soils, open sites, meadows, hillsides, pine, oak and mixed evergreen woods +
indeterminate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (3 cm30 mm <br />0.03 m <br />) +
globose;narrowly ovoid +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
cauline +  and basal +
linear;narrowly lanceolate entire or pinnately lobed +
pinnatifid +, lacerate +  and dentate +
linear +  and lanceolate or deltate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
2-carpellate +
white +  and dull yellowish +
persistent +
deltate +  and lanceolate +
leafy +  and ebracteate +
Flowering May–Aug. +
connate +  and distinct +
5 +  and 40 +
Contr. Dudley Herb. +
flat;low-convex +
10 +  and 15 +
linear +, orbiculate +, ovate +, oblong +, lanceolate +  and deltate +
5 +  and 10 +
aristate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
exalbuminous +
few +, 1 +  and 30 +
appendaged +  and truncate +
papillate +
Microseris leptosepala +
Microseris laciniata subsp. leptosepala +
Microseris laciniata +
subspecies +
15 cm150 mm <br />0.15 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +