18 THE CACTACEAE. 
Inst. 1908: pl. 14, f. 1; Thomas, Zimmerkultur Kakteen 46, as Mammillaria conoidea; 
Monatsschr. Kakteenk. 6: 119, as Mammiullaria grandiflora. 
Figure 15 is from a photograph of a barren plant collected by Dr. Safford in Mexico 
in 1907 (No. 1334); figure 17 is from a photograph of a flowering plant collected by Dr. 
Chaffey in the state of Zacatecas, Mexico, July 4, 1910. 
Related to the preceding is: 
MAMMILLARIA CREBRISPINA De Candolle, Mém. Mus. Hist. Nat. Paris 17: 111. 1828. 
Cactus crebrispinus Kuntze, Rev. Gen. Pl. 1: 260. 1891. 
This plant was collected by Thomas Coulter but its identification is very uncertain. 
Pfeiffer thought that it was related to Mammillaria conoidea and perhaps it should be 
referred there. 
Mammillaria polychlora Scheidweiler (Forster, Handb. Cact. 205. 1846) was given as 
a synonym of M. crebrispina. 
Fic. 18.—Neolloydia texensis. 
7. Neolloydia texensis sp. nov 
Globular to short-oblong, 4 to 6 cm. long: : . . . 
. ’ cm. long; tubercles arranged in long spirals, somewhat imbri- 
cared, little flattened dorsally ; radial spines Io to 15, white, widely spreading, about 1 cm. long; 
seen: f wt se 1 to 3, much stouter than the radials, elongated, 2 to 3 em. long, black; flowers not 
; Iruit small, globular, almost hidden by the spines, greenish, thin-walled, dry; seeds black, 
tuberculate, 1.5 mm. in diameter; hilum large, basal, white lunate. 
Collected by MacDougal and Shreve at Sanderson, Texas, December 1920. 
This seems to be the plant from Texas referred by Engelmann to Mammillaria scoly- 
motes but it probably is not that species which came from central Mexico. M. scolymoides 
En, ably should be considered a synonym of Coryphantha cornifera, the species of which 
nge mann once thought that it might be only aform. Coulter (Contr. U. S. Nat. Herb. 
hich he oes eee aoeae plant under the name of Cactus scolymoides but the range 
description and ran wl <, and doubtless more than one species is involved, both in his 
MacDougal and ge. he only specimen which we have seen of this species, except 
Be ane Shreve’s plant, is one collected by Walter M. Evans in 1891, which is 
mixed with Cactus echinus and labeled as from near El Paso, Texas " 
Figure 18 is from a photograph of plants collected by Dr. MacDougal and Dr. Shreve. 
