148 



THE CACTACEAE. 



F. 



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examination of the plant collected by Wislizenus (No. 223) north of Chihuahi 

 he herbarium of the Missouri Botanical Garden and labeled by Dr. Engelmann 

 nannii Salm-Dvck. shows that this soecies is of Schumann's series Fulvis-Pino, 



(our series Phaeacanthae) rather than series Tunae. 



more 



other species of Op 



Salm-Dyck, who first studied the species, doubtless had but a single specimen before him 



herbarium of the Missouri 



This 



specimen came from near Chihuahua City, from 



material 



Engelmann, who 



Salm-Dvck's name, described the 



from 



These 



remarks of his were doubtless based on notes of Dr. Wishzenus 

 and must have included more than one species; as Engelmann j 



towns and ranches. 



Engelmann 



some of the many forms grown 



specimen. In 1856 he refers here 



mouth 



Mexico 



material 



0. lindheimeri and four varieties. 



examination of herbarium and greenhouse specimens 



at least half a 



name 



While 



specimens are evidently to be excluded from 



hmits 



common 



extends to Monterey 



Mr. E. O. Wooton 



plants of southern New Mexico, and we are including large, bushy opuntias from A: 



Dr. Rose was inclined at one time to separate the Tucson plant, which seems t 



some just claims for specific recognition, but there is a mass of herbarium material 



seems to connect this with the true O. engelmannii. 



Opuntia engelmannii monstrosa (Cat. Darrah Succ. Manchester ^a. iqo8) is ^ 



abnormal forms so common among 



of this relationship, 

 solitary spines, orig: 



Mexico 



small 



many 



In 19 13 Dr. Rose explored the upper Pecos, especially about Anton Chico, near the 



specimens 



more spmy forms, some bearing as many as five spines at an areole, usually 



yellow, especially distally, 



more 



slender than m typical O. engelmannii. From the 

 same type locality, and associated with 0. cyclodes, is 0. expansa Griffiths, which has more 

 and whiter spines than the typical form, although they are sometimes yellowish with brown 

 bases. O. dtllet Griffiths is also related to O. cyclodes, but the spines are fewer; Dr. Grif- 

 fiths states, however, that more spines develop on cultivated plants 



Illustrations: Pac. R. Rep. 4 : pi. 8, f . i ; pi. 22, f . 8, 9, all as Opuntia engelmannii cyclodes; 

 Reo. Mo. Bot. Card. 20: n1 a I'n r»at-f r.^. n^....-t:^ ,j:u- a..- * ^ r^, ^ ti ^ 1 



E 



6, all as Opuntia arizonica. 



Smiths 



in. Rep. Mo. Bot. Gard. 22 : pi. 3, this last as Op 

 Smiths. Inst. 191 1: pi. 2; Bull. Torr. Club 32: p] 

 Mex. Bound, pi. 75, f. i to 4; Cvcl. Amer. Hort 



Mo. Bot. Gard. 21 : pi. 26, in part, 27, both as Opuntia 



Standley, Ann. 

 . Journ. 2: 1471 



Mex. Agr. Exp 



MacDougal 



from 



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