VOL. 111. } Mamillaria Notesteinii Britton. 349 
glands: leaves ovate-lanceolate, 2-3 cm. in length on slender, petioles 
more than half as long, the uppermost reduced to sessile bracts: 
proper bracts lighter green than the leaves, ovate-lanceolate, a pair 
sessile in each of the upper axils, 8-12 mm. long, nearly twice the 
length of the concealed calyx: flowers sessile, one or two in each 
pair of bracts: calyx cleft to the base, lobes lanceolate-acuminate: 
corolla rose-color 3-4 cm. long, the rather slender tube somewhat 
curved and a little longer than the nearly equally cleft and spreading 
lobes: anther cells muticous, parallel, one very slightly lengthened 
below: capsule oblong, 2 cm. long, the stipe-like portion occupying 
half the length; seeds flattened but thick, apparently violet in color, 
- covered with short, sinuous ridges. 
This plant was found growing about a spring on the Sierra Mata- 
pan. Its habit and flowers resemble those of related species, but its 
large bracts, of a lighter color than the leaves, make this a very 
distinct one, and the numerous blossoms crowded at the upper part 
of the stems surpass in beauty those of the well-known members. 
of the genus Anisacanthus. 
—>— 
MAMILLARIA NOTESTEINII Britton, 
Since the sending of my first specimen to Dr. Britton I have found 
quite a plantation of them, and after examining a number have. 
thought it best to modify the original description. : 
Mamiciaria NoTESTEINU Britton, stems ovate, simple, or occa- 
sionally caespitose, 2—8 cm. in diameter. Tubercles nearly terete and 
about 2 cm. long, spines 12—18 white, becoming gray with age, © 
weak and slender, 1—2 cm. long, spreading. The central spine. 
which is longer and stronger than the others, is generally tipped with 
reddish-pink. Pubescent throughout. Flowers 2—4 cm. in diame- 
ter, ash-gray, tinged and penciled with a delicate pink. Petals linear 
oblong, mucronate tipped; sepals tringed; fruit scarlet, obovate; seed 
black, globose, pitted. Soil and exposure to sunshine. changed the 
amount of coloring and penciling. co oe ap , 
Found by the writer in gravelly soil, near a small. creek, in this 
vicinity, June 4, 189I. _. F. N. NoTEsTEIN. 
College of Montana, Deer Lodge, Mont. 
