ESCOBARIA. 55 
Illustrations: Cact. Mex. Bound. pl. 12, f. 1 to 16, as Mammillaria tuberculosa; 
Forster, Handb. Cact. ed. 2. 417. f. 46; Schelle, Handb. Kakteenk. 235. f. 149, as M. 
strobiliformis. 
Figure 51 is from a photograph of the plant sent by Dr. Shreve from near El Paso, 
Texas, in 1920. 
”>2. Escobaria dasyacantha (Engelmann). 
a x» Mammillaria dasyacantha Engelmann, Proc. Amer. Acad. 3: 268. 1856. 
Cactus dasyacanthus Kuntze, Rev. Gen. Pl. 1: 259. 1891. 
Globose to short-oblong, usually 4 to 7 cm. in diameter but sometimes 20 cm. long; radial spines 
20 or more, white, bristle-like; central spines about 9, stouter and longer than the radials, upper half 
usually reddish or brownish, often 2 cm. long; flowers pinkish; perianth-segments narrowly oblong, 
ciliate, apiculate; stigma-lobes green; fruit clavate, scarlet, 15 to 20 mm. long; seeds black, 1 mm. in 
diameter, slightly flattened, pitted, with a narrow white subbasal hilum. 
Type locality: El Paso and eastward. 
Distribution: Western Texas, southern New Mexico, and northern Chihuahua. 
We have examined the type of this species which was collected by Charles Wright at 
El Paso in 1852. 
Escobaria dasyacantha is sometimes mistaken for Escobaria tuberculosa, but the stems 
are usually globose and the seeds larger and of a different shape. Engelmann speaks of its 
resemblance to Echinocactus intertextus dasyacanthus, now Echinomastus dasyacanthus, but 
this is only superficial, for the flowers, fruit, and seeds of the two species are very different. 
The name Coryphantha dasyacantha occurs in C. R. Orcutt’s Circular to Cactus Fanciers, 
1922. We had never seen this plant in cultivation until it was recently sent by Mrs. S. 
L. Pattison from western Texas. 
Illustrations: Cact. Mex. Bound. pl. 12, f. 17 to 22, as Mammillaria dasyacantha. 
Plate vu, figure 1, shows a plant sent by Mrs. S. L. Pattison from near El Paso, Texas, 
in 1921 which flowered in the New York Botanical Garden. Figure 52 is from a photo- 
graph of another plant sent by Mrs. Pattison from the same region. 
3. Escobaria chihuahuensis sp. nov. a 
Plants often solitary, perhaps also cespitose, globose to short-cylindric, very spiny; ca hehe 
short, usually hidden by the spines; radial spines numerous, spreading; central spines cevers , longer 
_ than radials, usually brown or black in upper part; flowers small, 1 to 1.5 cm. long, pap e; outer 
perianth-segments broad, often rounded at apex with ciliate margins; inner perianth-segments 
pointed. 
Common in the mountains near Chihuahua, where it was collected by Palmer (No. 72, 
type) in 1908 and by Pringle (Nos. 250, 251) in 1885. . cae. 
This plant should he compared with Mammillaria grusonii Riinge (Gartenflora 38: 
105. f. 20. 1889). L. Quehl believed that M. grusonit was closely related to M. scheeri, but 
he apparently knew it only from the original illustration and description. It does not 
suggest any of the species of Coryphantha to us. 
A. Escobaria runyonii sp. nov. ; 
Cespitose, with numerous (sometimes 100) globose to short-oblong heads, grayish green, 3 to 
5 cm. long with fibrous roots; tubercles 5 mm. long, terete in section with lar white. 4 a wan lone. 
groove at first white-woolly, not glandular; radial spines numerous, acicular, lack t ° 7 to 8 at, 
central spines stouter than radials, 5 to 7, slightly spr eading with rows or down the’ middle and 
long; flowers 1. 5 cm. long, pale purple; segments with a dark purp ‘inte sm gins: inner perianth- 
pale margins; outer perianth-segments narrow-oblong, with thin ciliate ma ch. stvle very pale: 
segments narrower than the outer, with margins entire, acute; filaments purp ish; sty y pale; 
Stigma-lobes 6, green; fruit scarlet, globose to short-oblong, 6 to 9 mm. long, Juicy. 
Collected by Robert Runyon in July 1921 and again in October of the same year year 
Reynosa, Mexico, about 75 miles up the Rio Grande from Brownsville, Texas, and on 
