94 



TH^ cactaceae:. 



species is beyond the limits hitherto assigned to any of the order, which are not recorded as growing 

 much south of the tropic of Capricorn. The cUmate is remarkably dry and clear hot m summer, 

 but with sharp frosts during the winter nights. He found Cacti both abundant and of a large size, 

 a little farther to the north at Rio-Negro in latitude 41 ° S. 



Illustration: Mag. Zool. Bot. i: pi. 14, f. 



I. 



1891 



Figure 109 is copied from a photograph of an herbarium specimen collected by Carl 

 Skottsberg in Patagonia in 1908. 

 65. Opuntia tarapacana Philippi, Anal. Mus. Nac. Chile iSqi^: 27. 



0/>Mn<ia ra/iwm Philippi, Anal. Mus. Nac. Chile 1891-: 27. 1891- 



Low, cespitose plants; joints small, ovoid, about 2 cm. long by i cm. thick, bearing spines from 

 white woolly areoles at tips; spines usually 3, straight, 12 to 15 mm. long, white with yellowish tips; 

 flowers yellow; petals 21 mm. long; ovary elongated, 2 cm. long. 



Type locality: Calalaste, Chile. 



Distribution: Known only from type locaUty, although Schumann in his Keys refers 



- . L 



this species to Bolivia. 



insufficient to enable us to give a very 

 species of the group. 



Museum at Santiago, ( 

 It seems distinct from 



I ^ 



Fig. 109. — O. darwinii. Xo.6 



Fig. ho. — O. atacamensis. Xo.6. 



Fig. III. — O. russellii. Xo.6, 



atacamensis 



i860. 



? Pereskia glomerata Pfeiffer, Enum. Cact. 179. 1837. Not Opunlia glomerata Haworth. 1830. 



Growing in large, dense clusters sometimes 6 dm. broad and 3 dm. high; joints ovoid, 2.5 cm. 

 long by 2 cm. in diameter; areoles in 5 to 7 series, the lower ones with wool and very short spines; 

 upper areoles each bearing i erect central spine 18 to 25 mm. long, yellow or reddish; radial spmes 

 2 to 4, strongly appressed, 2 mm. long; flowers yellow. 



Typ 



50' south latitude; 



deserts of 



700 



300 meters. 



We have not seen the type of this species, and our reference of Pereskia glomerata here 



may 



Illustration: Nov. Act. Soc. Set, Upsal. IV. i^: pi. i, as Opuntia grata. 



Figure 1 10 represents a plant obtained by Dr. Rose at the Botanical Garden, Santiago 



} 



Chile, in 19 14- 



russellii 



Forming small, compact clumps i to 2 dm. in diameter; joints small, globular to obovoid, dull 



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