Pelecyphora vivipara (Nutt.) D. Aquino & Daniel Sánchez. Common name: Spinystar. Phenology: May-Aug. Habitat: Dry, sandy or rocky prairies. Distribution: MB, SK, and AB south to OK, c. TX, w. TX, NM, AZ, s. CA and Mexico (CHH, COA, NLE, SON, ZAC).

Origin/Endemic status: Native

Taxonomy Comments: Pelecyphora vivipara consists of a large and widely variable complex of taxa with much intergradation between segregates. More study is needed to better delimitate taxa within this complex since the work of Zimmermann (1985). Plants of P. vivipara in the flora region represent the taxon first published as Mammillaria radiosa Engelmann, widely known in recent times as Escobaria vivipara var. radiosa (Engelmann) D.R. Hunt.

Synonymy ⓘ: = Sánchez et al (2022); = Coryphantha vivipara (Nutt.) Britton & Rose — FNA4; > Cactus neo-mexicanus (Engelm.) Small — S13; > Cactus radiosus (Engelm.) J.M.Coult. — S13; > Coryphantha vivipara (Nutt.) Britton & Rose var. vivipara — GrPl, Tx; < Escobaria vivipara (Nutt.) Buxb. — Mex; > Escobaria vivipara (Nutt.) Buxb. var. radiosa (Engelm.) D.R.Hunt — NcTx; > Escobaria vivipara (Nutt.) Buxb. var. vivipara — K4; < Mamillaria vivipara (Nutt.) Haw. — F; > Mammillaria vivipara (Nutt.) Haw. var. radiosa Engelm. — Weniger (1984); > Mammillaria vivipara (Nutt.) Haw. var. vivipara — Weniger (1984). Basionym: Cactus viviparus Nutt. 1813

Links to other floras: = Coryphantha vivipara - FNA4

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Heliophily ⓘ: 9