Bulletin University of New Mexico—No. 49 
1. MAMILLARIA. 
Small simple or cespitose plants, the spine bearing 
areolae borne on cylindric, oval, conical, or angular 
tubercles which cover the body of the plant; flowers 
about as long as wide, the tube campanulate or funnel- 
shaped, from a distinct wolly or bristly areola at the 
base of the tubercles, fully open in sunlight and only 
for a few hours. In ours the flowers arise from the 
base of a groove on the young tubercles, flowers red 
or reddish, sepals fimbriate. 
M. STROBILORMIS, Sacheer. Ovate or ovate-cylindri- 
eal, 2 to 5 in. high, tuberles spineless and corky in age, 
very villous axiles, outer spines 20-30, rigid, white 1 
1-2 to 3 in. long, rarely 4 or 5 in.; inner ones 5 to 9, 
stouter 3 to 7 in. long grayish purple. Flower very 
pale purple, berry red 7 in. long and 1-2 in. thick. 
Sandia Mts. July. 
M. vivipaRA, Haw. Simple or cespitose, 1 to 5 in. 
high, tuberles round, loosely arranged, slightly grooved, 
3 to 5 in. long; spines straight, rigid; the exterior 
widely radiate, white, 12-36, 2-8 in. long; the central 
3-12, stouter, longer, darker, a single more robust one 
perpendicular or deflexed; flowers a beautiful purple, 
large 1 1-2 to 2 1-2 in. diameter; berry ovate, green; 
seeds light brown pitted. Sandia Mts. May. 
2. CEREUS, Haworth. 
Flowers close above the bundles of full grown older 
spines, scales of ovary distinct with naked or woolly 
axils, berry sometimes very large and edible and cov- 
ered with spines or scales or almost naked. The plants 
are ribbed instead of tubercled. In ours 5-138, with 
3-12 spines in each areolae which are 1-4 to 1-3 in. 
long. 
Flowers purple, dwrnal,.. - .. -.. ©, FENDLERI. 
Flowers scarlet, open day and night, c. PAUCISPINUS. 
C. FENDLERI, Hng. Ovate-cylindrical, 3-8 in. high; 
ribs 9-12, spines from a bulbous base; radicals 7-10, 
straight or curved, some white, some grayish brown, 
some variagated,2-5 to 1 in. long the lower ones stout- 
er; central one stout, curved, blackish-brown, often 
elongated 1 to 1 3-4 in.; flowers lateral and near the 
apex 2 and 1-2 to 3 and 1-2 in. across, deep purple; 
berry 1 in. or more long. Sandia Mts. May. 
c. pAucispinus, Hng. Ovate-cylindrical, 5 to 9 in. 
high, 2 to 3 in. in diameter; ribs 5 to 7; areolae re- 
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