Tas. 7718 
MAMILLARIA vivirara. 
Native of the Rocky Mountains. 
Nat. Ord. Cacte#.—Tribe EcutnocactEa, 
Genus Mamitiaria, Haw.,; (Benth. & Hook. f. Gen. Plant. vol. i. p. 847.) 
Mamitraria (Coryphantha) vivipara; caule brevi depresso-globoso ovoideo vy. 
ovoideo-oblongo simplici v. caspitoso luride viridi, tuberculis ad 2 poll. 
longis laxis oblongo-ovoideis teretibus v. leviter sulcatis, aculeis 12-36 
gracilibus 3-3 poll. longis rectis rigidis exterioribus patentissime radianti- 
bus albis v. purpureo-fuscis, centralibus 3-12 robustioribus, foribus sub- 
terminalibus 1} poll. diam., sepalis linearibus oblanceolatisve fuscis 
- fimbriatis, petalis roseis lineari-oblanceolatis acuminatis margine fim- 
briatis apice setuliferis, stiginstibus numerosis anguste lineraribus, baccis 
sublateralibus ovoideis viridibus, seminibus obovatis scrobiculatis fulvis. 
M. vivipara, Haw. Syn. Pl. Succ. Suppl. p. 72. DC. Prodr. vol. iii. p. 459. 
Torr. §& Gr. Fl. N. Am. vol. i. p. 554, Leavenw. in Am. Journ. Sc. ser. 1, 
vol. xlix. (1845) p. 130. Huagelm. in Gray, Pl. Fendl. p.49; Pl. Lindh. p.197 ; 
Pl. Upper Miss. p. 192; Syn. Cact. U. St. p. 269; Cact. Mex. Bound. 
p. 15, t. 74, f. 3-5 (sem.); in Trans. Acad. St, Louis, vol. ii. p. 197; iu 
S. Wats. Pl. Wheeler, p.9; in King’s Rep. vol. v. p. 115; Hayd. Rep. 
1871, p. 484; Simps. Rep. p. 436. Salm. Cact. Hort. Dyck. p. 156. 
Lab. Monogr. Cact. p. 79. Porter § Coult. Fi. Colorad. p. 48; Coulter, 
Man. Bot. Rocky Mts. p. 109. Férst Handb. Caet. Ed. ii. p.302. Hirscht. 
in Schum. Gesamtb. Kakt. p. 547. Bot. Works, Engelm. p. 113, &e. 
M. arizonica, Engelm. in S, Wats. Pl. Wheeler, p. 9. 
M. missouriensis, Scheer, in Seem. Bot. Voy. Herald, p. 287 (non Sweet). 
Cactus viviparus, Nutt. Gen. vol. i. p. 295. Poir Encycl. Suppl. vol. v. 
p. 587. Torr. in Ann. Lyc. N. York, vol. ii. (1828) p. 202. 
I have some difficulty in reconciling the characters of the 
plant here figured with the descriptions of M. vivipara 
given by Engelmann in the numerous American railway 
and other reports in which he has alluded to it. I gather 
from these, however, that the species is a very variable 
one in size, form, and especially in the number and dis- 
position of the spines, some or all of which are described 
by him as being white, others purple, or mottled with 
purple ; all are dark coloured in the specimen here figured. 
Coulter, in the “ Rocky Mountain Flora” also describes 
the spines as variously coloured; “five to eight reddish- 
brown, surrounded by fifteen to twenty greyish ones in a 
single series.” Both authors say that the flowers are 
purple, whereas in our plant they are distinctly rose-red. 
June Isr, 1900. 
