PHRIiSKIOPSIS. 



^ 



■■ 



29 



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 



misidentification 



Museum 



specimens collected by Diguet at Guadalajara, Mexico, which were labeled Op 



spa 



Pereskia crassicaulis Zuccarini (PfeiflFer, Enum 

 simply being given as a synonym of P. spathulata. 



1837) was never published, 



8. Pereskiopsis pititache (Karwinsky) Britten and Rose, vSmitlis. Misc. Coll. 50:332. 1907 



Pereskia pititache Karwinsky in PfeilTcr, Knuni. Cact. 176. 1837. 



Pereskia calandriniaefolia Link and Otto in Salm-Dyck, Cact/llort. Dyck. 1S49. 2^2. iS^tj. 

 inff to Schumann.) ' 



(Accunl- 



Weber 



i8uS. 



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 ia 

 the center, with long, white hairs from their margins and no spines; leaves obovate or oblong- 



apex 



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, tlie spines unequal, 3 to 6, 25 to 37 mm. long. 



It was named by 



mm. lone, 16 mm 



Baron Wilhelm von Karwinsky and probably collected by him in Mexi 

 locality was given; Weber states it is from Tehuantepec, while Schuma 

 on a statement of Weber. 



Pereskia calandriniaefolia w^e have referred here, follow- 

 ing Schumann, but the original description is somewhat dif- 

 ferent from that of P. pititache, the leaves being described* 

 as spatulate to lanceolate, strongly narrowed below, 7.5 



cm 



m 



ing in the New York Botanical Garden obtained from 

 M. Simon, of St. Ouen, Paris, in 1901. 



Illustrations: Abh. Bayer. Akad. Wiss. Munchen 2 : pi. i, 

 sec. 6, f. I, 2; pi. 2, f. 9, both ^ls Pereskia pititache. 



Plate III, figure 3, represents a leafy shoot of a plant 

 sent by M. Simon, of St. Ouen, Paris, France, to the New 

 York Botanical Garden in 1901. 



9. Pereskiopsis aquosa (Weber) Britton and Rose, Smiths. Misc. 



Coll. 50: 331. 1907. 



^ Opuntia aquosa Weber, Bull. Mus. Hist. Nat. Paris 4: 165. 1898 



Shrub, with glabrous, glaucous,' green branches, the young 

 shoots with long white hairs at the areoles; leaves bright green, 

 nearly elliptic, acute, about twice as long as wide, narrowed at the 

 base, glabrous; spines usually sohtary, standing at right angles to 

 the stem, white; glochids few, yellow; flowers yellow; outer petals 

 blotched with red; fruit pear-shaped, 4 to 5 cm; dng, 2 to 2.5 

 cm. in diameter, yellowish green. 



Fig. 27 



Pereskiopsis aquosa 

 X0.66. 



