"i 



90 



THE CACTACEAE. 



The following varietal names, under Opuntia glomerata var. alhispina Forster (Handb. 

 Cact. 472, 1846), vax . flavispina Salm-Dyck (Cact. Hort. Dyck. 1844. 43. 1845), and var. 



synonym 



minor Salm-Dyck (Cact. Hort. Dyck. 1849. 71. 1850), are mentioned 



but not described. 



Opuntia horizontalis Gillies (Pfeiffer, Enum. Cact. 145. 1837) was 



of Opuntia andicola, and should be referred here. 



Opuntia pelaguensis (Salm-Dyck, Cact. Hort. Dyck. 1849. 71. 1850) was published as 



a synonym of Opuntia platyacaniha deflexispina. 



Opuntia andicola minor, an unpublished variety, is mentioned by name only in Monats- 

 schrift fiir Kakteenkunde (10: 48. 1900). 



Illustrations: Cact. Joum. i; 100, as Opuntia andicola: Bugler and Prantl, Pflanz- 

 enfam. a^'': f. 56, K.; Card. Chron. III. 34: f. 39; Monat sschr . Kakteenk. 13: 23, these 

 three as Opuntia diademata. Cact. Joum. i: February; Diet. Gard. Nicholson Suppl. 



1 



^.^^- 



1 



Handb. Cact. ed 



^ -. 



papyracantha ; Cact. Tourn. i: 105, as Opuntia pi 



mvea. 



Figure 104 represents a plant collected by Dr. Rose at Mendoza, Argentina, in 1915- 

 Opuntia schumannii Spegazzini (Anal. Mus. Nac. Buenos Aires III. 4: 511. 1905, 

 not Berger, 1904) is a homonym, and we hesitate to give it a new name until it is better 

 known. The type comes from Salta, Argentina, from a region where we already have a 

 number of species of Tephrocactus. Spegazzini, who described it, says it is related to 

 0. diademata, which is now referred to 0. glomerata, but is very distinct. It is without spines 

 and the flowers are unknown. 



" ■ ^ 



Series 4. PENTLANDIANAE. 





Plants often growing in large mounds; joints globular to oblong; spines usually slender, acicular 

 to subulate. Seventeen species are here recognized. 



J-' 



Key to Species. 



Spines very long and stout, up to 15 to 20 cm. long 60. 0. aoracanlha 



Spines slender, 10 cm, long or less. 

 Spines appressed to the joints. 



Spines 12 to 20, flexuous; joints 7 cm. long 61. O. ratippiana 



Spines 6 or 7; joints 2 to 4 cm. long 62. 0. sublerranea 



Spines straight, not appressed. 

 Spines flat or semiterete. 



Spines 7 to 10 cm. long 63. O. hickenii 



Spines 6 cm. long or less. 



Longer spines i to 3. 



Joints ellipsoid, 4 to 5 cm. thick. 64. O. danvinii 



Joints oblong, i cm. thick 65. O, tarapacana 



Ivonger spines 4 or 5. 



Spines gray ; 66. O. atacamensis 



Spines yellow 67. 0. russellii 



Spines terete. 



Spines white, at least when young. 



Joints tuberculate 68. 0. corrugata 



Joints not tuberculate. 



Joints oblong 69. O. ovata 



Joints globose 70. O. sphaerica 



Spines yellow to brown or nearly black. 



Roots large and woody; spines nearly black 71. O. skotishergii 



Roots fibrous. 



Spines purple-black 72. O. nigrispina 



Spines yellow to brown. 



Plants forming large clumps. 



Fruit about 2.5 cm. long, nearly unarmed 73. O. pentlandii 



Fruit 5 to 6 cm. long, copiously armed with long spines above 74. O. ignescens 



Plants isolated, not forming clumps. 



Old joints globose; spines acicular 75. O. campestrts 



Joints all oblong; spines subulate 76. O. ignota 



'■'i 





r 





' ■ A 





.< 





^ 



n r _ 





J:.y.- . 



