Paronychia baldwinii (Torrey & A. Gray) Fenzl ex Walpers ssp. riparia (Chapman) Chaudhri. Perennial Dune Whitlow-wort. Phen: Jun-Oct. Hab: Dry sandy sites, woodlands or dunes. Dist: Se. VA south to n. FL (and AL?), on the Coastal Plain.
Origin/Endemic status: Endemic
Taxonomy Comments: Though Chaudhri (1968) and Ward (1977a and 1977b) independently reached the conclusion to reduce P. riparia to a subspecies of P. baldwinii, neither stated any reasons for their choice of subspecific status. I here follow the independent conclusions of Chaudhri and Ward, but the appropriate taxonomic rank remains unclear.
Synonymy: = K1, Va, Ward (1977a), Ward (1977b); = Anychiastrum riparium (Chapm.) Small – S, S13; = Paronychia riparia Chapm. – C, F; < Paronychia baldwinii (Torr. & A.Gray) Fenzl ex Walp. – Fl4, FNA5, K3, K4, WH3; > Paronychia baldwinii (Torr. & A.Gray) Fenzl ex Walp. ssp. riparia var. ciliata Chaudhri – Chaudhri (1968); > Paronychia baldwinii (Torr. & A.Gray) Fenzl ex Walp. ssp. riparia var. riparia – Chaudhri (1968); < Paronychia riparia Chapm. – NY, RAB
Heliophily: 8
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