I04 



THE CACTACEAE. 



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the larger up to 6 cm. long, brown when young, fading white; leaves subulate, acuminate, i to 2 mm. 

 long; fruit obovoid, subtruncate, 1.5 cm. long. 



Limestone swale, Morillos de Cabo Rojo, Porto Rico (Britton, Cowell, and Brown, 

 No. 4741), growing with 0. repens Bello, from which it differs by its larger, broader, and 

 flatter joints and much longer spines. 



The only locality known for this plant is at the extreme southwestern corner of Porto 

 Rico, w^here numerous colonies of it were observed. The region is a very dry one, rain fall- 

 ing there only at long intervals; the associated vegetation is of a highly xerophytic character. 



Figure 126 represents joints of the type specimen above cited. 



84. Opuntia militaris sp. nov. 



Stems 3 dm. tall, the branches weak and more or less spreading; joints thick, narrowly oblong 

 to obovate, 5 to 8 cm. long, somewhat shiny when young, easily breaking apart; spines i or 2 from an 

 areole, occasionally more, acicular, white, i to 2 cm. long; flower-buds pointed; flowers small, 3 cm. 

 long; petals greenish to cream-colored, tinged with pink; ovary small, its small areoles without spines. 



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Collected by Dr. N. L. Britton, March 17 to 30, 1909, at the U. vS. Naval Station, 

 Guantdnamo Bay, Oriente, Cuba (No. 1957). 



Figure 127 represents joints of the type specimen above cited. 



Fio. 126. — Opuntia borinquensis. X0.5. 



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Fig. 127. — Opuntia militaris. X0.5 



nemoralis Griffiths. Monatsschr 



Plants 



1913 



r.,..t„ +T 1 "••' -""rvJ 1"—"—, -"x^^xxxg Slumps 1 meter in aiameter, sometimes 3 dm. high; loints 

 mate to obovate, thick, 7 to 9 cm. long, green, but often with purple blotches about the areoles; 



t? W fr,n-M^ ^ -iT ^^'"."PP^'' ^^^?^^' 2 to 2.5 cm. long, mostly erect; glochids yellow; flowers 

 yellow, fruit obovoid to pyriform, small, 3 cm. long, light red. truncate 



Distribution: 



IyOng\' 



Longv 



This species in habit, joints, and spines suggests the Tortisp 



, . •, , . , _-- -, J- , -^"xv.o ouggcsLs Lue lurnspinae; out on account oi 



having easdy detached joints we have referred it to the Curassavicae, as indicated in the 

 original description, placing it between the Cuban species O. militaris and the United 



otates SneoiPS () druturnniirfu Tf ie 1^«^,.,*, — 1.. r ii 



States species 0. drummondii. 



drummondii Graham in Maund 



from the type specimens 



1846. 



Opunlia pes-corvi LcConte in Engelmann, Proc. Amer. Acad i- ^^6 iS^fi 

 Opunha frustulenta Gibbes, Proc. Elliott Soc. Nat. W^.i^-J:^^,^^^^^^' 



roots Moins^rathefLrLh^Pn^^^ 'i^T- ""' ^'' ^i^^^'If^"^ th:^ck^n^d single or sometimes moniliform 

 cm W and .to 6 cm t,^^^^^ YZ ^"^ ^'""^^^^ °^^°"S. with entire margins, sometimes 1 2 



cm. long and 5 to 6 cm. broad, usually light green, sometimes darker about the areoles- leaves 2 to 



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