MAMMILLARIA 



ish above, the upper longer, erect, the lowest horizon- 

 il or deflexed: fls. 1 in. in diam., pale purple: fr. % in. 

 ritr, ivd; with a conical cap formed of the withered re- 

 ams of the flower: seeds brown. Tex. 

 23. cornuta, Hildm. Depressed-globose or hemispher- 

 al, small, grayish green: tubercles large, flattened and 

 ibricated; areolae round: radial spines 5-7, stout, short, 

 impressed, radiant, grayish, the upper longer; central 

 stouter, as long as the radials: fls. rose-red. "In age 

 :e spines fall off and the plant, covered with imbri- 

 ited, scale-like tubercles, reminds one of a pineapple." 

 iexico. 



MAMMILLARIA 



975 



1356. Mammillaria vivipara (X %). No. 19. 



24. elephantidens, Lem. Rather large, glaucous 

 ^reen: tubercles very large and thick, becoming hori- 

 ;ontal or deflexed and somewhat bilobed: spines 6-8, all 

 adi il, stout, yellowish or gray, appressed to the plant 

 md somewhat recurved: ,3s. rose-color, 3 in. in expan- 

 iion. Mexico. 



25. longimamma, DC. Cespitose, bright green, form 

 ng large, low clumps : tubercles sometimes more than 2 

 nches long: spines straight, pubescent; radials 7-10; 

 central 1: fls. 2 in. or more in expansion. "Mexico. 



Var. uberi!6rmis, Schum. Tubercles darker green: 

 adial spines seldom more than 4; centrals none. 



Var. globosa, Schum. Tubercles dark green, very 

 ong: radial spines as many as 12; centrals 2-3. 



Var. sphaerica, Engelm. Tubercles about 1 in. long. 

 adial spines 12-14; central 1. Tex. 



2G. Roseana, Brandg. (M. Radlidna, Quehl.). Upright 

 ranches 1-1% ft. long, l>-3 in. in diam.: tubercles 

 rather remote, flattened and appressed, later spreading: 

 radial spines 8; central 1, brownish, strongly hooked, 

 -2 in. long, twice as long as the radials: fr. bright red, 

 flat on the broad top and much shorter than the tu- 

 bercles. 



27. setisplna, Engelm. Upright branches 8-12 in. 

 long, 2-4 in. in diam., forming dense clumps: tubercles 

 rather crowded, ovate, short: spines white with black 

 tips; radials 10-12; centrals 1-4, stouter, the lower one 

 stronirly hooked, often twisted, 1^-2 in. long, 2 or 3 

 times as long as the radials : fr. red, much exceeding the 

 tubercles. 



28. P6ndii, Greene. Upright branches 10-15 in. long, 

 -2 in. in diam., making much smaller clumps than the 



two preceding: tubercles short, ovate, not crowded; axils 

 setose: spines in three series, outer 15-25, short, white; 

 inner 5-8, brown, longer; central row 3, brown, usually 

 2 of them strongly hooked, 1 in. or more in length, much 

 exceeding the other spines: fr. oval or obovate, dull 

 purplish red, % in. long. 



62 



29. Halei, Brandg. Upright branches 1K-2 ft. high, 

 2-3 in. in diam. : tubercles rather crowded, short-con- 

 ical from a broad base: spines sub-3-serrate, outer 

 15-25; centrals 6-9, darker, the lower one much stouter, 

 an inch or more long, usually straight but sometimes 

 hooked, twice as long as the other spines: fr. obovate 

 red. 



30. elongata, DC. (M. dSnsa, Link & Otto). Erect, 

 6-7 in. long, 1-1% in. thick: radial spines 16-18, yellow; 

 centrals none : fls. white or yellowish. Central Mex. 



Var. echinata, Schum. ( M. echinata and M . echinaria, 

 DC.). Radials as many as 20, yellow; centrals 2-3, 

 brown. A stout form. 



Var. t6nuis, Schum. (M. tennis, DC. M. minima, 

 Salm.) Radial spines about 20, pale yellow; centrals 

 none The most slender form, only % in. thick. 



Var. st611a-aurata, Schum. Stems somewhat thicker: 

 spines golden yellow; 1 central usually present. 



31. Ledna, Pos. Stems stouter, glaucous, upper axils 

 woolly: radial spines about 30, radiant, slender, white; 

 centrals 6-12, much stouter; the upper ones longest, 

 ivory white at base, dove-color or bluish above. Nuevo 

 Leon, Mex. 



32. decipiens, Scheidw. (M. Giiilleminiana, Lem.). 

 Irregularly cespitose, somewhat clavate, often rosy: 

 tubercles cylindrical; axils sparingly bristly: radial 

 spines 7-12, whitish; centrals 1-2, brown, longer; all 

 slender. Mex. 



33. fragilis, Salm. Stems low, usually as broad or 

 broader than high, extremely proliferous, the offsets so 

 lightly attached that they soon fall by their own weight: 

 radial spines 12-14, white; centrals none or 1, rarely 2, 

 white, with dusky tip. Mex. 



34. lasiacantha, Engelm. Low, usually globose or 

 depressed-globose : tubercles slender, axils naked : 

 radial spines as many as 40-80, feathery; centrals none. 

 Tex. 



Var. denudata, Engelm. (M. Rungei, Hort.). Larger, 

 both plant and tubercles : spines naked. Cact. 



35. plumdsa, Web. Densely cespitose, at length form- 

 ing masses 6-10 in. in diameter; axils long-hairy: radical 

 spines about 40, feathered to the tip; centrals none. 

 This and the preceding are like feathery balls. M. plu- 

 mosa is sold usually under the name of M. lasiacantha, 

 to which it appears to be rather closely related. North 

 Mex. 



36. senilis, Salm. "Proliferous at base: axils not se- 

 tose : tubercles crowded : spines all white ; exterior very 

 numerous, erect-spreading, hair-like, flexuous; centrals 

 4-6, a little stronger, the upper and lower hooked." 

 Chihuahua, Mex. 



37. barbata, Engelm. Globose-depressed: axils not 

 setose: exterior spines very numerous, pilose; interior 

 stronger, yellowish, 10-15; central solitary, stout-hooked, 

 yellowish, not much longer than the others: fls. small, 

 not remote from the center; sepals flmbriate: berry 

 "green." Near Chihuahua, Mex. 



38. v6tula, Mart. Subglobose or becoming subcylindri- 

 cal: axils not setose: radial spines bristle-like, at first 

 25-30, obliquely spreading, later twice as many and 

 horizontal ; centrals 1-3, yellowish brown, scarcely 

 stouter or longer. Mex. 



39. Candida, Scheidw. (M. sphcerdtricha, Lem.). At 

 length cespitose, globose, becoming longer: vertex de- 

 pressed: axils setose: radial spines bristle-like, more 

 than 50, horizontal and interwoven; inner spines 8, 10, 

 12. or more, a little stouter and upright: fls. flesh-color 

 or pinkish. 



40. pusilla.DC. (Cactus stelldtus,Wmd. M.stellaris, 

 Haw.). Low, globular, proliferous, making large 

 masses: tubercles cylindrical, small and loosely spread- 

 ing; axils with long, hair-like, tortuous bristles: radial 

 spines 12-20, very soft and flexuous; centrals 4-6, yel- 

 lowish, a little rigid, pubescent: fls. yellowish white. 

 W. Indies. 



Var. multiceps, Salm. Larger: tubercles upright, 

 crowded: radial spines numerous ; centrals 6-8, slender, 

 pubescent, reddish yellow. Mex. 



