Shrub; branches often without spines or the spines several, needle like, black, 2 to 3 cm. long; areoles globular, appearing as knobs along the stem; leaves about 5 cm. long, petioled; flowers 2.5 cm. long; petals entire, rose-colored.
Type locality: Near Tampico, Mexico.
Distribution: Eastern Mexico, but known only from the type locality.
P. tampicana is not well known and has been reported only from Tampico, Mexico. Dr. E. Palmer made a careful search for it some years ago at the type locality, but in vain. In 1912 Dr. Rose examined the two small specimens of the species preserved in the herbarium of the Royal Botanical Garden of Berlin, and is convinced that it is a Pereskia and not a Pereskiopsis.
Pereskia rosea A. Dietrich (Allg. Gartenz. 19: 153. 1851; Opuntia rosea Schumann, Gesamtb. Kakteen 764. 1898) is supposed to have come from Mexico, but we have not been able to identify it; Schumann refers to it in a note under P. tampicana. Here he also takes up Pereskia zinniaeflora De Candolle (Prodr. 3: 475. 1828). Both these specific names are much older than P. tampicana, and should either of them be found identical with it, the name P. tampicana would be rejected.
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