Corydalis micrantha (Engelmann ex A. Gray) A. Gray. Slender Corydalis. Phen: Apr-May; Jun. Hab: Circumneutral rock outcrops and adjacent glades and woodlands, also in disturbed areas (in DE). Dist: C. micrantha (in the narrow sense) is primarily midwestern, ranging from IL, WI, MN, and SD south to AR, TX, and OK, with disjunct outliers in e. TN and w. NC.

Origin/Endemic status: Native

Taxonomy Comments: Ownbey (1947) had no records of Southern Appalachian populations of C. micrantha, and considered "ssp. micrantha" to range no farther east than IL and MO; RAB included montane populations in ssp. australis, stating "this is the only [subspecies] in our range." Morphologically, however, these populations closely resemble C. micrantha; their association in the Brushy Mountains with other species disjunct from western or prairie ranges (Anemone berlandieri, Arabis pycnocarpa, Pellaea wrightiana) provides phytogeographic corroboration. Reported as non-native in DE (Longbottom, Naczi, & Knapp 2016).

Synonymy: = F; = Corydalis micrantha (Engelm. ex A.Gray) A.Gray ssp. micrantha – Ar, FNA3, GrPl, Il, K1, K3, K4, NcTx, Ownbey (1947); = Corydalis micrantha (Engelm. ex A.Gray) A.Gray var. micrantha – C, Tx; = n/a – RAB, Tat; < Capnoides micranthum (Engelm. ex A.Gray) Britton – S, S13; < Corydalis micrantha (Engelm. ex A.Gray) A.Gray – G

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Heliophily: 9