Microseris laciniata subsp. siskiyouensis

K. L. Chambers

Sida 21: 195, figs. 1, 2A, C. 2004.

Common names: Siskiyou silverpuffs
Endemic
Treatment appears in FNA Volume 19. Treatment on page 342. Mentioned on page 341.

Stems usually branched. Leaves linear to narrowly lanceolate, entire or pinnately lobed. Outer phyllaries not spotted, linear to ovate-deltate, smallest 1–1.5 mm wide, apices acute to acuminate, abaxial faces usually scurfy-puberulent. Pappi of 9–24, white, glabrous, aristate scales 0.5–2 mm, aristae barbellate. 2n = 18.


Phenology: Flowering May-–Jul.
Habitat: Loams or gravelly or rocky soils, rarely serpentine-derived, hillsides and valley flats, open grassy sites and woodlands
Elevation: 100–2100 m

Discussion

Subspecies siskiyouensis is known only from the Klamath Mountains, principally in Del Norte and Siskiyou counties, California, and Curry, Josephine, and Jackson counties, Oregon. It is found in open, rocky sites as well as woods, mostly at middle elevations. In the Illinois River Valley, Oregon, where it occurs together with Microseris howellii, the two are ecologically distinct. Microseris howellii is always found on rocky, open serpentine substrates; subsp. siskiyouensis is in mixed evergreen woodlands on better developed loam soils (K. L. Chambers 2004b).

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

scurfy-puberulent +
acute;acuminate +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Kenton L. Chambers +
K. L. Chambers +
decurrent +
Hymenonema laciniatum +
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 +
Siskiyou silverpuffs +
zygomorphic +, actinomorphic +  and (3-)5-merous +
purplish-spotted +, gray +  and brown or purplish +
Calif. +  and Oreg. +
100–2100 m +
scurfy-puberulent +  and glabrous +
winged +  and beaked +
dispersed +
Loams or gravelly or rocky soils, rarely serpentine-derived, hillsides and valley flats, open grassy sites and woodlands +
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 ovate-deltate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2-carpellate +
white +  and dull yellowish +
persistent +
deltate +  and lanceolate +
leafy +  and ebracteate +
curved-ascending +  and erect +
Flowering May-–Jul. +
connate +  and distinct +
5 +  and 40 +
flat;low-convex +
10 +  and 15 +
linear +, orbiculate +, ovate +, oblong +, lanceolate +  and deltate +
9 +  and 24 +
aristate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
exalbuminous +
scurfy +  and glabrous +
few +, 1 +  and 30 +
appendaged +  and truncate +
papillate +
Scorzonella laciniata +
Microseris laciniata subsp. siskiyouensis +
Microseris laciniata +
subspecies +
15 cm150 mm <br />0.15 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +