26 
the: cactaceae. 
that it has not been re-collected. It was collected at Escondido Springs, near the- 
Pecos, Texas. Schott points out how it differs from Echinocereus caespitosus in the follow¬ 
ing words: 
“In C. caespitosus the flower-buds are clothed with a dense grayish wool and bear beautiful 
flowers 2 inches in diameter and 2 inches in length. In Cereus concolor the flower-buds are perfectly 
naked, small, campanulate blossoms with yellowish sanguineus petals perfectly like the spines in 
color, 0.5 inches in diameter and 0.8 inches in length.” 
Echinopsis reichenbachiana Pfeiffer (Forster, Handb. Cact. 365. 1846) was used only 
as a synonym. 
Echinocereus pectinatus castaneus (Monatsschr. Kakteenk. 1: 144. 1891), unpublished, 
doubtless belongs here. 
Illustrations: Gray, First Lessons Bot. 96; Gray, Struct. Bot. ed. 5. 421. f. 838; ed. 
6. 170. f. 317, as Mammillaria caespitosa*; West Amer. Sci. 7: 238; Diet. Gard. Nicholson 
4: 511. f. 6; Suppl. 217. f. 228; Cact. Mex. Bound, pi. 43, 44; Deutsche Gart. Zeit. 5: 209; 
Watson, Cact. Cult. f. 19; Curtis’s Bot. Mag. 109: pi. 6669; Gartenflora 29: 52, as Cereus 
caespitosus; Gartenflora 30: 413; Garten-Zeitung 3: 16. f. 7; Fngler and Prantl, Pflanz- 
enfam. 3 60 : f. 56, F; Forster, Handb. Cact. ed. 2. f. 105, 138; Cact. Joum. 1: 107, 135; 
Britton and Brown, Illustr. FI. 2: 461. f. 2523; ed. 2.2: 559. f. 2982; Riimpler, Sukkulenten 
140. f. 75; Ann. Rep. Smiths. Inst. 1908: pi. 4, f. 6, as Echinocereus caespitosus; Monats¬ 
schr. Kakteenk. 15: 171; Floralia 42: 369, as Echinocereus pectinatus caespitosus. 
Figure 26 is copied from plate 43 of the Mexican Boundary Survey, above cited; 
figure 25 is from a photograph furnished by Robert Runyon of a plant collected near 
Saltillo, Mexico. 
34. Echinocereus baileyi Rose, Contr. U. S. Nat. Herb. 12: 403. 1909. 
Plant body cylindric, about 10 cm. high; ribs 15, straight or sometimes spiral; areoles elongated, 
separated from the adjacent ones by a space of about their own length; radial spines at first white, 
when mature brownish or yellowish, about 16, somewhat spreading, those at the top and base of the 
areole smaller; central spines none; areoles when young clothed with dense white wool, this nearly 
or quite wanting in age; flowers from the youngest growth appearing terminal; perianth widely 
spreading, 6 cm. broad or more; inner segments light purple, oblong to spatulate-oblong, the broad 
apex toothed or erose, the terminal teeth tapering into a slender awn; filaments short, yellow; style 
stout, longer than the filaments; stigma-lobes 10, obtuse; areoles of the ovary bearing 10 to 12 
slender spines intermixed with cobwebby wool, the spines whitish or the central ones brownish; 
areoles of the tube crowning an elongated tubercle, not so closely set, bearing spines subtended by 
minute leaves. 
Type locality: Wichita Mountains, Oklahoma. 
Distribution: Mountains of Oklahoma. 
This very interesting species was collected in August 1906 by Mr. Vernon Bailey, for 
whom it was named, in the Wichita Mountains, Oklahoma. The following August it 
flowered and then died. Until recently we supposed that this was the only collection 
known but, while restudying the genus, we find that a plant sent by a Mr. Merkel from 
Oklahoma flowered in July 1908. We have since endeavored to collect specimens, but 
without success until we were reading the second proof. On Major F. A. Goldman’s return 
from Oklahoma in August 1921 he informed us that Echinocereus baileyi was very com¬ 
mon in the Wichita National Forest near Cache and he arranged with the forest super- 
* On inquiring of Miss Mary A. Day regarding these references we received the following reply under date of 
June 15, 1921: 
"The name Mammillaria caespitosa used by Dr. Gray in his Structural Botany, edition 5, 1858, appears one year 
earlier in his First Lessons in Botany and Vegetable Physiology, page 96, 1857. This is the earliest reference X 
find for it. In the foot-note at the bottom of the page where this name is given, Dr. Gray himself has crossed out 
Mammillaria caespitosa and written in Cereus caespitosus. He has also crossed off the words ‘Upper Missouri,” 
and written in ‘Texas.’ This would indicate that Dr. Gray himself considered the name Mammillaria caespitosa. 
or the figure of it in his First Lessons, and Structural Botany, the same as Engelmann’s Cereus caespitosus of Texas.” 
