MAMMILLARIA 



MAMMILLARIA 



1977 



micromeris, 33. 

 minima, 34. 

 missouriensis, 5. 

 multiceps, 45. 

 mutabilis, 75. 

 neo-mexicana, 28. 

 Nickelste, 25. 

 nivea, 68. 

 nivosa, 78. 

 nogalensis, 12. 

 Nuttallii, 5. 

 Odieriana, 62. 

 Palmeri, 49. 

 Parkinsonii, 69. 

 pectinata, 22. 

 Petersonii, 76. 

 petrophila, 73. 

 Pfeifferi, 62. 

 phellosperma, 32. 

 plumosa, 40. 

 Pondii, 3. 

 Poselgeri, 1. 

 Potosina, 67. 

 pubescens, 6. 

 pusilla, 45. 



A. Stamens and style exserted beyond the petals; fls. irreg- 



ular, slender, tubular, somewhat curved and bila- 

 biate. (Subgenus Cochemiea.) 



1. P6selgeri, Hildmann (M. Roseana, Brandeg. M. 

 Radliana, Quehl.). Upright branches 1-1 ^ ft. long, 

 1K~3 in. diam.: tubercles rather remote, flattened and 

 appressed, later spreading: radial spines 8; central 1, 

 brownish, strongly hooked, 1-2 in. long, twice as long as 

 the radials: fr. bright red, flat on the broad top and 

 much shorter than the tubercles. 



2. setispina, Engelm. Upright branches 8-12 in. 

 long, 2-4 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 

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

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

 tubercles. Low. Calif. 



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

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

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

 setose: spines in 3 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 ex- 

 ceeding the other spines: fr. oval or obovate, dull pur- 

 plish red, %in. long. Calif. 



4. Halei, Brandeg. Upright branches lJ^-2 ft. high, 

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

 from a broad base: spines sub- to 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. Calif. 



AA. Stamens and style shorter than the petals; fls. regular, 

 short, tubular. 



B. Tubercle on old plant with a narroiv groove on upper 



side: fls. from the vertex of the plant. 

 c. Fr. red; seeds black. 

 D. Color of fls. yellow. 



5. missouriensis, Sweet (M. Nuttallii, Engelm.). 

 Nearly simple, 1-2 in. diam. : tubercles cylindric-conical, 

 loose and spreading, slightly grooved: spines white, 

 weak, puberulent, not hiding the body; radials 12-17, 

 spreading; central one longer and stouter, often wanting: 

 fls about 1 in. long, yellow to fawn-color, with reddish 

 streak; sepals fimbriate; petals acute or acuminate: 

 berry red, the shape and size of a small pea; seeds black 

 and pitted. Mont, to Kans. and E. Colo. 



Var. similis, Engelm. Cespitose, in clumps often a 

 foot broad : spines fewer: fl. and fr. larger. Kansas River 

 to Texas. 



Var. robustior, Engelm. (M. Wissmannii, Hildmann). 

 Almost simple: tubercles longer and looser: spines 



smooth, rather short and stout; radials 10-12; central 

 1: fls. even larger than in M. similis. Texas. 



DD. Color of fls. rose. 



6. tuberculdsa, Engelm. (M. strobiliformis, Scheer). 

 Ovate or cylindric, rather slender, somewhat dry of tex- 

 ture, the spines falling from the older tubercles, leaving 

 them as dry, corky protuberances: tubercles short-ovate 

 from a broad base; axils densely woolly: radial spines 

 20-30, slender, rigid, white; centrals 5-9, stouter, pur- 

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

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

 red, with a conical cap formed of the withered remains 

 of the fl.; seeds brown. Texas. Four varieties of M. 

 tuberculosa, vars. csespititia, durispina, pubescens, and 

 rufispina, which have been distributed in European 

 collections, doubtless belong here. 



7. dasyacantha, Engelm. Simple, subglobose: tu- 

 bercles terete, loose: radial spines 25-35, hair-like, 

 white, with brownish apex; centrals 7-13, bristle-like, 

 pale below, brown above, longer, the most interior one 

 horizontal, sometimes wanting: seeds black, with nearly 

 basal hilum. Texas. 



cc. Fr. green; seeds brown. 

 D. The tubercles grooved only in upper half. 



8. macromeris, Engelm. Fig. 2314. Low, usually 

 soon proliferous, dark green: tubercles large and long, 

 loose and spreading, but often incurved; groove rather 

 short: radials 10-17, weak, slender and spreading; cen- 

 trals at maturity usually 4, somewhat stouter and much 

 longer, sometimes more than 2 in. long: fls. purple, often 

 3 in. in expansion; petals erose, mucronate: fr. with 

 several scales on the ovary. Along the Rio Grande from 

 New Mex. to Texas. 



DD. The tubercles grooved from top to bottom. 

 E. Glands 1 or more in the axils of the tubercles. 



9. macrothele, Mart. (M. aulacothele, Lem. M. Leh- 

 mannii, Otto). Sts. stout, attaining nearly 2 ft. height 





2314. Mammillaria macromeris. ( X '2) 



by 4 in. diam. : tubercles long, conical, at first upright, 

 in age becoming even deflexed: spines all yellow; radials 

 6-8, spreading; centrals 1-2, longer and stouter: fls. 

 1^-2 in. broad. Cent. Mex. 



10. raphidacantha, Lem. Sts. becoming 1 ft. or more 

 long, 2-3 in. diam., often clavate: tubercles erect- 

 spreading, somewhat flattened, often with 1 or 2 glands 



