Microseris laciniata subs. siskiyouensis
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).