. Carnegie Institution of Washington publication. PIvKKSKIOPSIS. Type locality: In Mexico. Distribution: Probably southern Mexico, but no definite locality is known. There is some confusion in the literature of this species; Schumann describes it as pubescent, while in the original description nothing is said about pubescence; this error is probably due to a misidentification, for Dr. Rose found in the Museum of Paris two specimens collected by Diguet at Guadalajara, Mexico, which were labeled Opnutia spctthulata, and which have pubescent branches and leaves; these are undoubtedly O. Jignctii.
. Carnegie Institution of Washington publication. PIvKKSKIOPSIS. Type locality: In Mexico. Distribution: Probably southern Mexico, but no definite locality is known. There is some confusion in the literature of this species; Schumann describes it as pubescent, while in the original description nothing is said about pubescence; this error is probably due to a misidentification, for Dr. Rose found in the Museum of Paris two specimens collected by Diguet at Guadalajara, Mexico, which were labeled Opnutia spctthulata, and which have pubescent branches and leaves; these are undoubtedly O. Jignctii. Pcrcskia crassicaulis Zuccarini (Pfeiffer, Enum. Cact. 176. 1837) was never published, simply being given as a synonym of P. spatludata. 8. Pereskiopsis pititache (Karwinsky) Britton and Rose, Smiths. Misc. Coll. 50:332. 1907. Pereskia pililaclic Karwinsky in Pfciffcr, Knum. Cact. 176. 1837. Pereskia calandriiiiiicfuliii Link and Otto in Salm-Dyck, Cact. Hort. Dyck. 1X49. 252. ing to Schumann.) Opuntia pititache Weber, Bull. Mus. Hist. Nat. Paris 4: i65. 1898. 1850. (Accord- Stems rather low and somewhat branching; bark light brownish and flaking off; areoles on main trunk each bearing i to 4 slender acicular spines and a small cluster of yellowish glochids; branches, even when several years old, bearing a single long, acicular spine from an areole and no glochids; young and growing branches rather slender and green, their areoles small, black in the center, with long, white hairs from their margins and no spines; leaves obovate or oblong- obovate, 4 cm. long or less, pale green, thin, acute or bluntish at the apex, narrowed at the base. Type locality: In Mexico. Distribution: Uncertain, but reported from southern Mexico. In the original description this species is said to have a very spiny, erect woody trunk, the branches spreading nearly horizontally, the spines unequal, 3 to 6, 25 to 37 mm. long, the leaves fleshy, green, lanceolate to ovate, 37 mm. long, 16 mm. broad. It w
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