Microseris howellii
Howell's microseris
basal and cauline, 10–30 cm, linear to narrowly oblanceolate, bases tapering;
margins entire to toothed or pinnate with linear, often curved lobes;
tips acuminate;
surfaces glabrous or lightly mealy-pubescent.
few-bracted near bases, glabrous or mealy-pubescent below heads.
8–17 mm.
8–30;
ligules well exceeding involucres, yellow.
in several series, purple-spotted; inner equal, lanceolate;
tips acuminate;
surfaces usually pubescent with black, appressed hairs; outer sometimes unequal, deltoid to lanceolate;
tips acuminate.
4–7 mm, brown;
ribs smooth.
scales 5–10, 3–6 mm; silvery white; awns smooth or finely barbed.
=18.
Microseris howellii
Open, usually rocky, serpentine grasslands and woodlands. Flowering May–Jun. 300–1100 m. Sisk. Native. Endemic to Oregon.
Microseris howellii is endemic to Oregon, occurring principally on moist serpentine outcrops. Its long pappi scales differentiate it from other nearby perennial taxa, from which it is ecologically separated by its adaptation to exposed, rocky habitats. Microseris laciniata ssp. laciniata sometimes shows similarly elongated pappi scales where it comes into contact with ssp. detlingii.
Kenton Chambers
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
