20 THE CACTACEAE. 
This species was probably first collected by Seemann in the Sierra Madre of Mexico, 
where it was collected by Dr. Rose in 1897. It has frequently been introduced into culti- 
vation but does not do well, soon dying out. It is able to stand considerable cold and in 
its home is usually covered with snow during the winter. 
Salm-Dyck gave two varieties without descriptions, based on two unpublished names, 
when he first listed Mammillaria senilis, as follows: M. senilis haseloffit (Salm-Dyck, Cact. 
Hort. Dyck. 1849. 8. 1850; M. haseloffii Ehrenberg, Allg. Gartenz. 17: 303. 1849) and M. 
senilis linkei (Salm-Dyck, Cact. Hort. Dyck. 1849. 8. 1850; M. linket Ehrenberg). The 
former, however, was published the previous year as M. haseloffii and has priority. 
Illustrations: Fl. Serr. 21: pl. 2159; Rev. Hort. Iv. 2: pl. 334; Belg. Hort. 24: pl. 3; 
Cact. Journ. 1: pl. for March; Contr. U.S. Nat. Herb. 5: pl. 62; Schelle, Handb. Kakteenk. 
245. f. 163; Tribune Hort. 4: pl. 140; De Laet, Cat. Gén. 28. f. 41; Gartenwelt 14: 331; 
Mollers Deutsche Gart. Zeit. 25: 475. f. 8, No. 31; Succulenta 4: 80, as Mammillaria senilis. 
Figure 19 is from a photograph of a flowering plant; figure 20 is from a photograph 
of two flowers of a plant obtained in the Sierra Madre, Mexico, by I. Ochoterena in 1911; 
figure 21 is reproduced from the third illustration cited above. 
Fic. 21.—Mamillopsis senilis. 
2. Mamillopsis diguetii (Weber). 
Mammillaria senilis diguetit Weber, Bull. Mus. Hist. Nat. Paris 10: 383. 1904. 
Plants densely cespitose, forming a hemispheric clump of about 35 globular heads, each 25 
cm. in diameter; radial spines numer 
ous, dark straw-colored; flowers 3 cm. long, about 2 cm. broad 
deep red; ovary bearing small scales. ° ° . | 
Type locality: Sierra de Nayarit, Jalisco. 
Distribution: Jalisco to Sinaloa, Mexico. 
made i ees until recently, was known only from the single collection of L. Diguet 
tthe ten ‘900; e found it in the mountains of Jalisco at an altitude of 2,500 meters. 
i noo en collected by J. G. Ortega in the Sierra de Chabarra, Concordia, Sinaloa, 
The type is in the Museum of Natu 
Rose in May 1912; he believes that i 
ferent color and much more rigid tha 
ral History of Paris and was studied there by Dr. 
t is distinct from M. sentlis, the spines being of a dif- 
n in that species. 
sha a i aa as Ei 
