the; cactaceae. 



Plate XX, figure 3, shows a flowering joint of a plant sent to the New York Botanical 

 Garden by M. Simon, of St. Ouen, Paris, France, in 1901, as Opuntia puherula. Figure 151 

 is from a photograph of the plant sent from La Mortola, Italy, to the same institution 

 in 1912, as Opuntia puherula. 

 111. Opuntia macrocalyx Griffiths, Rep. Mo. Bot. Gard. 19: 268. 1908. 



"A profusely, divaricately branched, ascending or erect, spreading plant, 9 to 10 dm. high and 

 about the same in diameter; joints long-obovate, variable but commonly 9 by 22 cm. for last year's 

 o-rowth, gray green, pubescent, velvety to the touch; areoles subcircular, usually 2 to 3 mm. in 

 diameter, very close to i cm. apart, slightly sunken ; wool tawny, prominent, as long as spicules and 

 occupying lower half of areole; spicules reddish brown, about i mm. long, occupying upper half of 

 areole, easily separable and causing fully as much annoyance in handling as those of 0. microdasys, 

 in age often appearing dirty yellow in situ but distinctly reddish brown when removed; strictly 

 spineless; flowers yellow, green outwardly, the leaves on ovary very long subulate and changing 

 gradually into the sepals which are very long subulate, delicately pointed, loosely arranged or often 

 half recurved at apex, giving to the bud a rather ragged appearance; fruit red but both pulp and 

 rind greenish, long obovate to cylindrical, about 2 by 7 cm., with but few rather small seeds, about 

 3 mm. in diameter." 



Fig. 152. — Opuntia macrocalyx. X0.75. Fig. 153. — Opuntia rufida. 



Type locality: In cultivation at Riverside, CaUfornia. 



Distribution: Known only from cultivated plants ; perhaps also from Coahuila, Mexico. 

 Illustration: Rep. Mo. Bot. Gard. 19: pi. 28, in part. 



Figure 152 is drawn from a joint of the plant collected by Fdward Palmer at Saltillo, 

 Mexico, in 1904. 



112. Opuntia rufida Engelmann, Proc. Amer. Acad. 3: 298. 1856. 



Opuntia microdasys rufida Schumann, Gesamtb. Kakteen 706. 1898. 



More or less erect, 2 to 15 dm. high, with a somewhat definite trunk; joints nearly orbicular, 

 6 to 25 cm. in diameter, thickish, velvety-tomentose, dull grayish green ; leaves subulate, caducous, 

 4 to 6 cm. long, green with reddish tips; areoles large, filled with numerous brown glochids; flowers 



