Houstonia serpyllifolia Michaux. Appalachian Bluet, Thyme-leaf Bluet. Phen: (Mar-) May-Jul. Hab: Streambanks, grassy balds, moist forests, seepy rock outcrops, spray cliffs, and moist disturbed areas. Dist: A Southern and Central Appalachian endemic: PA south to nw. SC and ne. GA.

ID notes:The flowers are very similar to, but usually a brighter blue than, the more widespread H. caerulea.

Origin/Endemic status: Endemic

Synonymy: = F, G, K1, K3, K4, Pa, RAB, S, Tn, Va, W, WV, Terrell (1991), Terrell (1996); = Hedyotis michauxii Fosberg – C, GW2, Rogers (1987)

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