Stellaria porsildii (Porsild's Starwort)
Perennial herb with slender rhizomes; stems erect, growing in clumps, but not densely matted, 9-18 cm tall, glabrous; leaves opposite, sessile, linear to linear-lanceolate, 27-35 mm long, ciliate at base; flowers solitary in upper leaf axils; peduncl...