OPUNTIA. 



163 



composed of many 



Leon 



of spines, shape of joints, and color of flowers. Brother 



several individually quite different plants which inhabit hilltops in Cuba. 



Opuntia lucayana Britton (Bull. N. Y. Bot. Gard. 4: 141. 1906), inhabiting Grand 

 Turk Island, Bahamas, differs in having elongated, often narrowly oblong joints 2 to 4 

 times as long as wide and many elongated, little-flattened spines. It grows with Opuntia 

 dillenii and O. nashii, and is beUeved to be a hybrid with these species as parents. A 



similar plant was observed 

 mmediately 



Danish West 



unmistakable, and similar plants were seen also on Antigua, British West Indies. 



Opuntia cuhensis Britton and Rose (Torreya 12: 14. 1912), observed in a valley near 



Guantanamo 



smaller 



Op 



its stout spines little flattened. It grows near 



made to the possible hybrid origin of Opuntia 



with O. dillenii as one of its parents. (Seep. 115). 



Two varieties of Opuntia dillenii are given by name only; minor Salm-Dyck (Hort. 



Dyck. 185, 1834); orZ;zcw/a/a Salm 



1850). 



Opuntia gilva Berger (Hort. Mortol. 233. 191 2) is unpubhshed. The name was ap- 

 plied to a specimen collected by Carl F. Baker in Cuba in 1907, and has been distributed 

 under this name. It is only a form of this very variable species. 



The plant is hardy on the Gulf coast of the United States and in southern California. 

 It is widely distributed through cultivation in the warmer parts of the Old World, being 

 a "pest pear" in southern India and in Australia; it is used for hedges in Teneriffe, and is 



common 



cm 



^. J - Bermuda. 



spineless, and its joints elongate sometimes to a length of 3 dr 

 ide. This elongation of the joints also appears in plants from 

 Edwards's Bot. Reg. 3: pi. 255, as Cactus dillenii; Rep. Mo. Be 



Elth 



Amer. Tourn. Pharm 



'puntt 



Wiss. Miinchen 



Amer.Gardenii:473(?);Cycl.Amer.Hort.Bailey3:f. 1545. 1546; Cact.Journ. i: 154 (?); 

 Dept. Agr. N. S. W. Misc. Publ. 253: pl- [2]; Diet. Gard. Nicholson 2: f 757; W. Watson, 

 Cact. Cult. f. 86, all these as Opuntia tuna; Journ. N. Y. Bot. Gard. 10: f- 26, this ^s Opun- 

 tia inermis; Loudon, Encycl. PI. ed. 3. f . 6878, this as Cactus tuna; Britton Fl. Bermuda 255. 



Plate XXVIII, figure 2, represents a flowering joint of a plant collected m 1901 by N. L. 

 Britton and T. F. Cowell on the Island St. Martin, West Indies; plate xxix, figure i is 

 from a ohoto^raoh of the related Opuntia keyensis growing on Boot Key Florida, taken 



Marshall A. Howe in 1909; figure 2 is from a photograph 



in 



Figure 201 is from 



or 



Antigua, British West 



linguiformis Griffiths, Rep. Mo. Bot. Gard. 19: 270. 1908 



A bushy plant, i meter high or more; joints elongated, oblong « -f e^oblong o 1^^^ 

 2 to 5 dm. long or even more, often several times longer than wide, P^^^g'^^^"/"^/^^^^ 

 leaves 6 mm. long, terete; spines yellow, very slender, terete or "^,^.^^J ^^° ' ^^^^f^ /f ^^^^^^ 

 wool; flowers yellow, 7 to 8 cm. broad; petals broad , filaments ^^^^^^ °X"^ ^^ ^^^^^^ ^^ pS- 

 lobes 9, green; ovary bearing numerous long glochids at the upper areoles, frmt reddish purple. 



seeds 3 or 4 mm. broad, acute on the back. 



Type locality: Near San 

 Distribution: Southern ' 



