296 CACTACEAE. 



2. Opuntia Millspaughii Britton, Smiths. Misc. Coll. 50: 513. IPOS. 



Trunk terete, 7 cm. thick at base, 5 cm. thick at top, 6 dm. high or less, 

 branching at the summit, the branches divaricate-ascending, narrowly oblong, 

 much compressed, 40 cm. long or less, 5 to 10 cm. wide, 1 to 1.5 cm. thick, 

 light green. Branchlets obliquely lanceolate, obtuse, as wide as the branches, 

 but shorter, 1 cm. thick or less, floriferous at and near the apex; areoles of the 

 older branches pitted, about 1 cm. apart, those of very young shoots slightly 

 elevated, the glochides very short, yellow-brown; spines of the trunk 15 em. 

 long or less, very numerous and densely clothing the trunk, very slender, gray, 

 mostly strongly reflexed, pungent, those of the branches and branchlets re- 

 stricted to the areoles on their edges, shorter than those of the trunk, but 

 similar, those of the fruit yellow-gray, 2 cm. long or less ; flowers cupulate, 

 crimson-lake, 1 cm. wide ; sepals fleshy, ovate, acute, 4 mm. long and wide ; 

 petals erect-ascending, obovate, mucronulate, about 4 mm. wide; stamens half 

 as long as the corolla; style about as long as the corolla; stigma oblong, yel- 

 lowish crimson ; fruit compressed-obovoid, 2 cm. long, 1.5 cm. thick, bearing 

 one or two spines at most of the areoles. 



On nearly flat and smooth limestone rocks. Eleuthera, at Rock Sound : Long 

 Island, on Thatch Cay ; Great Ragged Island : Cuban Cays. MILLSPAUGH'S PRICKLY- 

 PEAR. 



3. Opuntia bahamana Britton & Eose, Oactaceae 1: 203, /. 254, 255. 1919. 



Branched from a short trunk, bushy, about 1.5 m. high. Joints oblong to 

 lanceolate, flat and thin, 1-5 dm. long, 4-10 cm. wide, dull green, obtuse, 

 scarcely undulate ; areoles 1.5-3 em. apart, scarcely elevated, about 2 mm. in 

 diameter, spineless, or bearing 1-4 acicular yellow spines 2 cm. long or less; 

 glochides few and short ; corolla about 6 cm. broad ; petals obovate, rose-tinted 

 below, yellowish-rose above ; sepals dark rose, whitish-margined. 



Rocky places, Cat Island at The Bight. Endemic. Tentatively referred to 0. 

 lanceolata Haw., in Smith. Misc. Coll. 50 : 525. BAHAMA PRICKLY-PEAR. 



4. Opuntia lucayana Britton, Bull. N. Y. Bot, Gard. 4: 141. 1906. 



Stems ascending, often forming dense clumps. Joints various, linear- 

 oblong to obovate, often 10 dm. long, 6-15 cm. wide, olive-green, slightly 

 lustrous, more or less crenate, about 1.5 cm. thick, knobbed at the areoles; 

 areoles distant, nearly 1 cm. broad, white-velvety; glochides numerous, yellow, 

 6 mm. long or less, mostly borne at the upper margins of the areoles; spines 

 3-8 at each areole, light-yellow, flattened on the upper side, subulate, straight, 

 often somewhat twisted, the longer ones 12 cm. long or less; flowers yellow, 

 7-8 cm. broad; stamens about half as long as the petals; ovary narrowly pyri- 

 form, 4-5 cm. long, its upper areoles bearing 1-3 subulate pale-yellow spines 

 2.5 cm. long or less, which are sometimes persistent on the fruit; berry pyri- 

 form, 5-6 cm. long, 2-3 em. in diameter. 



Scrub-lands, Grand Turk Island. Endemic. TURK'S ISLANDS PRICKLY-PEAR. 



The reference to Opuntia Tuna at the place of original publication of this species 

 is erroneous ; as now understood, O. Tuna grows naturally only in Jamaica. 0. 

 lucayana may be a hybrid between O. DiUcnii and O. NasJiii. 



5. Opuntia Dillenii (Ker-Gawl.) Haw. Suppl. PI. Succ. 79. 1819. 



Cactus DiUenii Ker-Gawl. Bot. Reg. 3: pL 255. 1818. 



Bushy-branched, 0.5-1.8 m. high, often forming masses 2 m. in diameter. 

 Joints green, glabrous, mostly obovate and 1-2.5 dm. long, about 8 mm. thick, 

 crenate, the areoles 2-6 cm. apart, somewhat elevated, bearing 1-4, stout yellow 

 spines 1-4 cm. long, or spineless, the numerous glochides yellowish to brownish, 

 6 mm. long or less; flowers solitary at the areoles, often abundant, bright 



