OPUNTIA. 



85 



leaves described as wanting; tubercles spirally arranged, obtuse, somewhat 4-angled, 5 to 6 mm 

 broad; areoles somewhat depressed; spines 5 to 7, brown, 3 to 5 cm. long, flcxuous, the upper ones 

 erect; flowers borne near the top of the plant, small, solitary; ovary somewhat woolly below and with 

 short spines above; flower rotate, yellow; fruit dry, white, 10 mm. in diameter; seeds somewhat 

 contorted, bony, glabrous. 



Type locality: In Sierra Pie de Palo, Province of San Juan, Argentina. 



Distribution: Mountains of Provinces of San J 

 This description, though largely drawn from 

 ies, has been amplified from examination made 



Spegazzini's full account of this 

 le type. Dr. Spegazzini refers it 



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Fig. 100. — Opuntia weberi. Natural size. 



Tephrocactus, and we have followed him in this; but it differs widely from 



be elsewhere. If the plant 



may 



Spegazzini 



the character of Opuntia. 



Figure 99 is from a photograph of the plant at Mohnos, Argentma ;_ligure 100 

 photograph of the type specimen in the collection of Dr. Spegazzini, to whon 

 indebted for both of these illustrations. 



