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: pi. 14, f. 5; Mollers Deutsche 

 Gart. Zeit. 25: 477. f. 11, No. 4; 29: 88. f. 10 (abnormal form), as Pelecy phora 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. 



14. NEOMAMMILLARIA nom. nov. 



Mammillaria * Haworth, Syn. PI. 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 {Mammillaria brandegeei with some scales 

 and white fruit, according to Schumann) or white or greenish in a 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, Dolichothele, and 

 Cochemiea, giving them generic rank. From his fourth subgenus we have excluded Mam- 

 millaria micromeris as the type of the genus Epithelantha] and M. phellosperma to the 

 genus Phellosperma (see page 60). 



The species, of which we recognize 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, perhaps in error. 



During the period of our investigation political conditions in Mexico have prevented 

 our obtaining much original information concerning many of the species and have made it 

 necessary for us to depend largely upon published descriptions and illustrations. 



* The name was also spelled Mammilaria by Torrey and Gray (Flora i: 553) and Mamillar a by Reichenbach 

 (Mossier, Handb. ed. 2. i: i. 1827) and by Schumann (Gesamtb. Kakteen 472 and elsewhere). 

 t See Cactaceae, 3: 92. 1922. 



