PELECYPHORA. 59 
Mammillaria schumanniana (Monatsschr. Kakteenk. 12: 178. 1902) was evidently 
intended for M. schumannii. 
Illustrations: Monatsschr. Kakteenk. 1: facing 89; Thomas, Zimmerkultur Kakteen 
51, as Mammillaria schumannit. . 
Plate vu, figure 6, shows a plant collected by Dr. Rose at Cape San Lucas, Lower 
California, in March 1911 (No. 16375), while a member of the scientific staff of the U. S. 
Steamer Albatross. Figure 55 is from a photograph of another plant from the same 
collection. 
{JO /\ 10. PELECYPHORA Ehrenberg, Bot. Zeit. 1: 737. 1843. 
\ # é 
Plants small, cespitose, cylindric or globose, tuberculate, watery; tubercles not arranged on ribs, 
strongly flattened, crowned with an elliptic areole bearing a pectinate spine, never grooved; flowers 
borne near center, broad, campanulate, purplish, the segments in definite series; flower-tube very 
short, slender; stamens short; fruit small, naked; seeds black, smooth. 
Only one species, native of Mexico, is here recognized, Pelecyphora aselliformis 
Ehrenberg, the type. A second species has generally been referred here but it differs so 
widely from the other that we have no hesitancy in segregating it generically (see genus 
No. 13, p. 64). 
The generic name is from mé\exus hatchet, and dopés bearing, referring to the shape 
of the tubercles. 
The plant has usually been regarded as a near relative of Mammillaria, but it has little 
in common with that genus. The flowers are central, borne in a mass of wool or hairs; 
the tubercles are not grooved and the seeds are black and smooth. It has been difficult for 
us, with the material at hand, to make out definitely the origin and position of the flower, 
but it seems to originate on the central sunken disk. This disk at first bears only clusters 
of hairs in the center of which the flower is produced. In time the flower opens and the 
tubercle, with its peculiar spiny crown, is developed, leaving in its axil the tuft of hairs 
about the flower. 
Di. Pelecyphora aselliformis Ehrenberg, Bot. Zeit. 1: 737. 1843. 
Pelecyphora aselliformis concolor Hooker in Curtis’s Bot. Mag. 99: pl. 6061. 1873. 
Pelecyphora et lle grandiflora Haage jr., Cact. Kultur ed. 2. 206. 1900. 
Tufted, cylindric, 5 to 10 cm. high, 2.5 to 5 cm. in diameter, covered with tubercles arranged in 
spirals; tubercles strongly flattened laterally, somewhat stalked at base; areoles at top of tubercles 
very long and narrow, crowned by an elongated, scale-like spine with numerous lateral ridges, usual y 
free at tip, giving a peculiar pectinate appearance; flowers 3 cm. broad or more, campanu a e: 
perianth-segments in 4 rows, the outer ones sometimes white, oblong, acute; stamens orne a top ° 
flower-tube, much shorter than perianth-segments; stigma-lobes 4, erect; seeds 1 mm. broad, 
kidney-shaped. 
Type locality: Mexico. 
Distribution: About San Luis Potosi, Mexico. 
This plant does not do well in cultivation. It is known generally as the hatchet 
cactus, and is also called peote and peyote, also peyotillo and peotillo; it is said by the 
Mexicans to possess medicinal properties. . 
M ammillarig aselliformis, according to Watson (Cact. Cult. 188. 1889), was described 
in 1843, but we have found no other reference to it, except that Dr. A. Weber gives i 3 a 
synonym, crediting it to Monville. The name Anhalonium aselliforme Weber and Arto- 
carpus aselliformis Weber (Dict. Hort. Bois 931. 1898), quoted by Schumatn as synonyms, 
were not formally published. Pelecyphora fimbriata Hildmann (Monatsschr. Kakteenk. 3: 
68. 1893), simply a name, may or may not belong here. . . | 
I ne. Haage, Cact Kultur ed. 2. 206, as Pelecyphora aselliformis grandiflora; 
Amer. Gard. 11: 474; Curtis’s Bot. Mag. 99: pl. 6061, as Pelecyphora aselliformis concolor ; 
