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. 1, under Opuntia pottsii, add to illustrations: Watson, Cact. Cult. 
ed. 3. f. 58; Dict. Gard. Nicholson 4: 580. f. 49, as Opuntia filipendula. 
On page 145, vol. 1, under Opuntia phaeacantha, add to illustrations: Deutsche Gart. 
Zeit. 7: 447, as Opuntia camanchica; Meehans’ Monthly 11: 57, as O. phaeacantha major ; 
Shreve, Veg. Des. Mt. Range pl. 5, A, as O. toumeyi; De Laet, Cat. Gén. f. 58. 
On page 147, vol. 1, under Opuntia engelmannii, add the synonym: Opuntia engelmannit 
discata C. Z. Nelson, Trans. Ill. State Acad. Sci. 12: 124. 1919. 
Also add to illustrations: Cact. Journ. 1: pl. for February; 2: 162, as Opuntia engel- 
mannii cristata; Gard. Chron. ur. 39: 148. f. 58; Plant World 9”: f. 49; Shreve, Veg. Des. 
Mt. Range pl. 5, B; Stand. Cycl. Hort. Bailey 4: f. 2601; Scientific Month. 17: 70, 71, 72. 
On page 149, vol. 1, under Opuntia discata, add to illustrations: Carnegie Inst. Wash. 
2609: pl. 10, f. 87. 
On page 153, vol. 1, under Opuntia bergeriana, add to illustrations: Gartenwelt 11: 75. 
On page 153, vol. 1, under Opuntia elatior, add to illustrations: London, Encycl. Pl. ed. 
3. 411. f. 6879, as Cactus nigricans. 
On page 155, vol. 1, under Opuntia boldinghii, add to distribution: Chacachacare and 
Patos Islands, Trinidad. 
On page 156, vol. 1, under Opuntia vulgaris, insert: Opuntia gracilior (Index Kewensis 
3: 357. 1894) is a mistake for O. monacantha gracilior Lemaire. 
Add to illustrations: Méllers Deutsche Gart. Zeit. 25: 476. f. 9, No. 20, as Opuntia 
monacantha variegata; Pl. Utiles Madagascar 124. f. 39; 125. f. 39. 
On page 158, vol. 1, under Opuntia arechavaletai, add to illustration: Karsten and 
Schenck, Vegetationsbilder 11: pl. 17. 
On page 158, vol. 1, 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 only 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. monaconths Haworth) which was found by the writer at Rio de Janeiro and is familiar in 
ustralia. 
Add to illustration: Anal. Mus. Nac. Montevideo 5: pl. 33, as Opuntia chakensis. 
On page 159, vol. I, insert after Opuntia scheeri: Opuntia diversispina Griffiths (Bull. 
Torr. Club 46: 197. pl. 9. 1919) grown from seed of unknown origin at Brownsville, Texas, 
is described as similar to O. scheeri and in the accompanying illustration the joints resemble 
those of that species. 
On page 160, vol. 1, Opuntia chlorotica, add to illustrations: Bull. N. Mex. Coll. Agr. 
No. 78. pl. [4]; Stand. Cycl. Hort. Bailey 4: f. 2600. 
On page 161, vol. 1, under Opuntia laevis, add to illustrations: MacDougal, Bot. N. 
Amer. Des. pl. 56. 
On page 163, vol. 1, under Opuntia dillenii, add to illustrations: Garden 13: 107,* as 
Opuntia crassa; Bull. Torr. Club 46: pl. 10, as O. maritima; Lindley, Veg. King. ed. 3. 746. 
f. 498, No. 1, 2: Knorr, Thesaurus pl. 0; Watson, Cact. Cult. ed. 3. f. 56. 
On page 163, vol. I, insert: 
174a. Opuntia ochrocentra Small, sp. nov. 
Erect, 1 meter tall or less, much branched 
_ t or sometimes di i ; joi 
elliptic to oval, varying to broadest above the m anes Giiinse, with fibrous roots; jour? 
iddle, 1 to 3 dm. long, thickish, light green, not 
It is, however, the i . 
which we have seen — one that Nicholson used (f. 757) 
* This illustration is not very good for this i 
and that W. Watson used (f. 86) as Opuntia tuna, which 
