26 



THE CACTACKAK. 



v.. 



leaves and areoles similar to those of the stem ; leaves on ovary spreading or ascending and persisting 



tinged with yellow ; petals bright yellow. 



Type locality: In hedges about 

 taro, Mexico. 



ry) 



Q 



Distribution: Table-lands of central Mexico 

 This plant is called by the natives nopaleta j 



cola de diablo. 



Smiths. Misc 



Figure 2 1 is from a photograph of type pi 



iMopsis digu 



ths. Misc. Cc 



itii (Weber) Britton and Rose, 

 1.50:332. 1907. 



Opuntia diguetii Weber, Bull. Mus. Hist. Nat. Paris 4: 

 166. 1898. 



Tall shrub, larger than the preceding species; old 

 stems reddish; branches pubescent; areoles when young 

 filled with long, white, cobwebby hairs, when old large 

 and filled with short black wool ; leaves elliptic to obovate, 

 3 to 5 cm. long, usually abruptly pointed, more or less 

 cuneate at the base ; spines usually i , rarely as many as 

 4, at first nearly black, in time becoming lighter, some- 

 times nearly 7 cm. long; glochids brownish, not very 

 abundant; flowers yellow; fruit 3 cm. long, red, pubes- 

 cent, its areoles often bearing spines as well as glochids ; 

 seeds white, 5 mm. broad, covered with matted hairs. 



Type locality: Near Guadalajara, Mexico. 



Distribution: Central Mexico, 



Common in hedges near Guadalajara and 

 Oaxaca, Mexico. According to W. E. Safford, it 

 is. known in Guadalajara as tasajillo and alfilerillo. 



Figure 22 represents a leafy branch of a plant 

 collected by W. K- Safford in Guadalajara, Mexico, 

 in 1907. 



3. Pereskiopsis opuntiaeflora (De CandoUe) Britton and 



Vi 



Misc 



1907 



Pereskia opuntiaeflora De CandoUe, Prodr. 3: 475. 1828. 

 Opuntia ffolziana Schumann. Gesamtb. Kakteen 6-;^. 



Kakteen 654. 1898. 



Shrubby, glabrous ; leaves obovate, mucronate, 

 often in pairs; spines, when present, solitary, elongated, 

 2 to 3 times as long as the leaves; flowers subterminal, 

 short-pedunculate; petals numerous, ovate, subacute, 

 reddish yellow, arranged in two s 

 bearing areoles filled with glochids. 



Type locality: In Mexico. 

 Distribution : Known onl v 



ovary 



description. 



from the original 



This description is drawn from 





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Fig. 21. — Pereskiopsis velutina. 



of 



This species, as illustrated by De CandoUe, is unlike anything we know. In its pedun- 

 culate fruit It is hke Pereskia, but its leafless ovary and its areoles filled with glochids would 





from 



specimen 



5 more like a Pcreskiop 

 had fallen awav from 



B J 



