NEOMAMMILLARIA. 65 
This plant is very rare in living collections and is known only from a few localities 
near Tehuacan; one of these is near El Riego Hotel, where Dr. Rose obtained some 50 
plants in 1905 but all have since died. We have been endeavoring since to obtain additional 
plants but Dr. Reko reports that this hill has been burned over and that no plants can now 
be found. Dr. Rose found it scattered over the top and side of a rounded hill, growing 
here and there among the stones and stunted plant life, looking not unlike the dull earth 
and pebbles. 
Illustrations: Gartenflora 34: 25; Garten-Zeitung 4: 182. f. 42, No. 14; 217. f. 48; 
Grassner, Kakteen 1912: 29; Ann. Rep. Smiths. Inst. 1908: pl. 14, f. 5; Mollers Deutsche 
Gart. Zeit. 25: 477. f. 11, No. 4; 29: 88. f. 10 (abnormal form), as Pelecyphora pectinata; 
Monatsschr. Kakteenk. 29: 81; Schelle, Handb. Kakteenk. 275. f. 198; Garten-Zeitung 
4: 217. f. 49, as P. pectinata cristata; Monatsschr. Kakteenk. 3: 172. f. 5, as P. aselliformis 
pectinata. 
Figure 63 is from an enlarged photograph showing the top of a plant, collected by Dr. 
Rose at Tehuacan in 1905. 
{ so ( 
) © S\ 14, NEOMAMMILLARIA nom. nov. 
Mammiillaria * Haworth, Syn. Pl. Succ. 177. 1812. Not Stackhouse, 1809. 
Plants globose, depressed-globose, or short-cylindric, occasionally much elongated, some with 
milky, others with watery juice; tubercles arranged in more or less spiraled rows, never on vertical 
ribs, terete, angled or sometimes flattened, never grooved on upper surface, usually bearing wool or 
hairs and sometimes bristles, but without glands in their axils and crowned by the spine-areoles, 
spines in clusters on top of tubercles, sometimes all alike, sometimes with central ones very different 
from the radial, all straight or sometimes one or more of central spines hooked; flowers, so far as 
known, diurnal, all from axils of old tubercles, much alike as to size and shape, more or less cam- 
panulate, comparatively small, variously colored, commonly red, yellowish or white to pinkish; 
perianth-segments rather narrow, spreading; stamens numerous, borne on base of perianth-tube, 
short, included; style about length of stamens; stigma-lobes linear; fruit usually clavate, rarely if 
ever globose, usually ripening rapidly, naked, scarlet (M ammiliaria brandegeet -with some scales 
and white fruit, according to Schumann) or white or greenish ina few species; seeds brown in some 
species, black in others. 
The type is Mammillaria simplex Haworth, based on Cactus mammillaris Linnaeus. 
We have given much time in attempting to group the species into definite series but 
have’ not succeeded, since many of the species are little known and incompletely described. 
The name, Neomammillaria, as here used, replaces the name Mammillaria of Haworth 
(1812), which is a homonym of the Mammillaria of Stackhouse (1809), a genus of Algae. 
The genus, as here treated, differs from Schumann’s treatment (Gesamtb. Kakteen 
472-601, 1898) in that we exclude three of his four subgenera, Coryphantha, Dolichathele, and 
Cochemiea, giving them generic rank. From his fourth subgenus we have excluded 4 an 
millaria micromeris as the type of the genus Epithelanthat and M. phellosperma to the 
enus Phellosperma (see page 60). 
° The species, of eke or nize 150, are native chiefly of Mexico, extending north- 
ward into the southwestern United States; one species is reported as far north as Utah and 
Nevada. ‘Two species are known from the West Indies (none is found in Jamaica or in the 
Lesser Antilles south of Antigua). Several species are known from Central America (none 
has been reported from Costa Rica, El Salvador, or Panama). One species is found in 
Venezuela and neighboring islands and one is described from Colombia, per aps in error. 
During the period of our investigation political conditions in Mexico raw e prev ented 
our obtaining much original information concerning many of the Specie’ an ave 
necessary for us to depend largely upon published descriptions and i ustrations. a - 
* The name was also spelled Mammilaria by Torrey and Gray (Flora 1: 553) and Mamillar a by Reichenbach 
(Méssler, Handb. ed. 2. 1: 1. 1827) and by Schumann (Gesamtb. Kakteen 472 and elsewhere). 
t See Cactaceae, 3:92. 1922. 
