70 



THE CACTACEAE. 



Plate XI, figure 3, represents a leaf -bearing joint of a plant obtained by the same col- 

 lector on Espiritu Santo Island, Lower California ; figure 4 is from a plant sent to the New 

 York Botanical Garden from La Mortola, Italy, in 1906. Figure 85 is from a photograph 

 of a plant collected by Dr. Rose at San Francisquito, Lower CaUfornia. 



34. Opuntia burrageana sp. nov. 



Usually low and bushy, rarely i meter high; stems slender, i to 2 cm. in diameter, densely 

 spiny; leaves small, 2 mm. long, green, early deciduous; old stem and branches terete; young 



Fig. 84. — Opuntia prolifera 



Fig. 85. — Opuntia alcahes. 



joints cylindric to narrow-clavate, 15 cm. long or less; areoles closely set; tubercles rather low, 

 not much broader than long; spines numerous, similar, spreading, rarely 2 cm. long, all covered 

 with thin, bright-yellow sheaths; wool in areoles short, brown; glochids, when present, short, light 

 yellow; flowers to 4 cm. broad; petals few, brownish red with green bases ; filaments green ; stigma- 

 lobes white; ovary very spiny; fruit not proliferous, globular, 2 cm. in diameter, somewhat tuber- 

 culate, probably dry; seeds pale, 4 mm. in diameter. 



Common on the hiUs along the coast of southern Lower California. 



