262 THE CACTACEAE. 



tentatively placed in the Cactaceae. It should surely either be the type of a separate series or be 

 placed in the Series Basilares, to the members of which, judging by illustrations, it shows great 

 resemblance." 



On page 138, vol. I, under Opuntia pottsii, add to illustrations: Watson, Cact. Cult, 

 ed. 3. f. 58; Diet. Gard. Nicholson 4: 580. f. 49, as Opuntia filipendula. 



On page 145, vol. i, under Opuntia phaeacantha, add to illustrations: Deutsche Gart. 

 Zeit. 7: 447, as Opuntia camanchica; Meehans' Monthly 11: 57, as 0. phaeacantha major; 

 Shreve, Veg. Des. Mt. Range pi. 5, a, as 0. toumeyi; De Laet, Cat. Gen. f. 58. 



On page 147, vol. i, under Opuntia engelmannii, add the synonym : Opuntia engelmannii 

 discata C. Z. Nelson, Trans. 111. State Acad. Sci. 12: 124. 1919. 



Also add to illustrations: Cact. Journ. i: pi. for February; 2: 162, as Opuntia engel- 

 mannii cristata; Gard. Chron. iii. 39: 148. f. 58; Plant World 9'- : f. 49; Shreve, Veg. Des. 

 Mt. Range pi. 5, b; Stand. Cycl. Hort. Bailey 4: f. 2601 ; Scientific Month. 17: 70, 71, 72. 



On page 149, vol. i, under Opuntia discata, add to illustrations: Carnegie Inst. Wash. 

 269: pi. 10, f. 87. 



On page 153, vol. i, under Opuntia bergeriana, add to illustrations: Gartenwelt 11 : 75. 



On page 153, vol. i, under Opuntia elatior, add to illustrations: London, Encycl. PI. ed. 

 3. 411. f. 6879, as Cactus nigricans. 



On page 155, vol. i, under Opuntia boldinghii, add to distribution: Chacachacare and 

 Patos Islands, Trinidad. 



On page 156, vol. i, under Opuntia vulgaris, insert: Opuntia gracilior (Index Kewensis 

 3: 357. 1894) is a mistake for 0. monacantha gracilior Lemaire. 



Add to illustrations: Mollers Deutsche Gart. Zeit. 25: 476. f. 9, No. 20, as Opuntia 

 monacantha variegata; PI. Utiles Madagascar 124. f. 39; 125. f. 39. 



On page 158, vol. i, under Opuntia arechavaletai, add to illustration: Karsten and 

 Schenck, Vegetationsbilder 11: pi. 17. 



On page 158, vol. i, under Opuntia bonaerensis, insert: Mr. W. B. Alexander writes of 

 this species as follows: 



This species was seen only on rocky slopes in the Sierra de la Ventana in the south of the 

 province of Buenos Aires. It is known onl}^ from the few Sierras which rise from the pampas in 

 the east of the province. There is little doubt that it is nearly related to Opuntia vulgaris Miller 

 (0. monacantha Haworth) which was found by the writer at Rio de Janeiro and is familiar in 

 Austraha. 



Add to illustration: Anal. Mus. Nac. Montevideo 5: pi. 33, as Opuntia chakensis. 



On page 159, vol. i, insert after Opuntia scheeri: Opuntia diversispina Griffiths (Bull. 

 Torr. Club 46: 197. pi. 9. 1919) grown from seed of unknown origin at Brownsville, Texas, 

 is described as similar to 0. scheeri and in the accompanying illustration the joints resemble 

 those of that species. 



On page 160, vol. i, Opuntia chlorotica, add to illustrations: Bull. N. Mex. Coll. Agr. 

 No. 78. pi. [4]; Stand. Cycl. Hort. Bailey 4: f. 2600. 



On page 161, vol. i, under Opuntia laevis, add to illustrations: MacDougal, Bot. N. 

 Amer. Des. pi. 56. 



On page 163, vol. i, under Opuntia dillenii, add to illustrations: Garden 13: 107,* as 

 Opuntia crassa; Bull. Torr. Club 46: pi. 10, as 0. maritima; Lindley, Veg. King. ed. 3. 746. 

 f. 498, No. I, 2: Knorr, Thesaurus pi. o; Watson, Cact. Cult. ed. 3. f. 56. 



On page 163, vol. i, insert: 

 174a. Opuntia ochrocentra Small, sp. nov. 



Erect, I meter tall or less, much branched or sometimes diffuse, with iabrous roots; joints 

 elUptic to oval, varying to broadest above the middle, i to 3 dm. long, thickish, light green, not 



*Tliis illustration is not very good for this species. It is, however, the same one that Nicholson used (f. 757) 

 and that W. Watson used (f. 86) as Opuntia tuna, which we have referred here. 



