ASTROPHYTUM. 



I8 3 



Dr. C. A. Purpus who knows this species very well writes that it has two very different 

 forms. The gray or grayish-white form grows near Torreon, in Cerro de la Bola, and in the 

 mountains near Viesea, all in Coahuila. The more greenish lower form is abundant in the 

 Sierra la Tabla, near Guascama or Minas de San Rafael, San Luis Potosi. It usually grows 

 in the open mesa among broken stones, but is sometimes associated with other plants, 

 such as Opuntia leptocaulis. 



Cereus inermis Scheidweiler (Bull. Acad. Sci. Brux. 6 1 : 88. 1839), usually referred 

 here as a synonym, was never published. 



Echinocactus myriostigma hybridus is advertised by Haage and Schmidt, but we do 

 not know its origin; the varieties, columnaris and nudus, are in the trade. 



Many hybrids are produced with this species as one of the parents. In 1896 (Monats- 

 schr. Kakteenk. 6: 20) Fl. Radl* named and described twelve hybrids, while in 1907 Schellef 

 (Handb. Kakteenk. 151, 152) listed 59 hybrid names under Ecliinocactiis myriostigma. 



Illustrations: Monatsschr. Kakteenk. 29:81; 

 Gartenwelt 15: 537, as Echinocactus myriostigma 

 columnaris; Lemaire, Icon. Cact. pi. 16; Schelle, 

 Handb. Kakteenk. f. 78; Mollers Deutsche Gart. 

 Zeit. 25:474. f. 6, No. 11 ; 486. f. 19; 29: 89. f. 11 ; 

 Cycl. Amer. Hort. Bailey 2: 515. f. 746; Stand. 

 Cycl. Hort. Bailey 2: f. 1374; Gardening 9: 617; 

 Gard. Chron. III. 52: f. 103; Loudon, Encycl. 

 PI. ed. 3. 1376. f. 19368; Bluhende Kakteen 2: 

 pi. no; Engler and Prantl, Pflanzenfam. 3 60 : f. 

 56, E; f. 62; Monatsschr. Kakteenk. 6: 22; 12: 4; 

 18: 9; 29: 141 ; vSchumann, Gesamtb. Kakteen f. 1 ; 

 Curtis's Bot. Mag. 71: pi. 4177; Gartenwelt 15: 

 537; 17: pi. opp. 412; Journ. Hort. Home Farm. 

 III. 59: 631 ; De Laet, Cat. Gen. f. 16, 22 ; Watson, 

 Cact. Cult. 112. f. 40; ed. 3. f. 27; Gard. Chron. 

 III. 12: 789. f. 129, as Echinocactus myriostigma; 

 Forster, Handb. Cact. ed. 2. 461. f. 54; Cact. 



T i r o a i_ s Tii tt a o Fig. 193. Astrophytum myriostigma. 



Journ. 1: pi. for September; 164; Illustr. Hort. 8: 



pi. 292; Riimpler, Sukkulenten 188. f. 106; Orcutt, West Amer. Sci. 13: 3; Gartenfiora 34: 

 56. f. 1885; Monatsschr. Kakteenk. 3: 159. f. in; 7: 170; Lemaire, Cacteesso. f. 4; Deutsche 

 Gart. Zeit. 5: 369; Orcutt, Rev. Cact. opp. 41. 



Plate xxii, figure 3, shows a flowering plant in the collection of the New York Botan- 

 ical Garden, received in 1901 from M. Simon, St. Ouen, Paris, France, which has since 

 bloomed several times. Figure 193 is from a photograph of a plant collected by C. A. 

 Purpus in northern Mexico in 1905. 



2. Astrophytum asterias (Zuccarini) Lemaire, Cactees 50. 1868. 



Echinocactus asterias Zuccarini, Abh. Bayer. Akad. Wiss. Miinchen 4 2 : 13. 1845. 

 Plant much depressed, only 2 to 3 cm. high, about 8 cm. broad; ribs 8, very low, almost flat on 

 top, the surface bearing numerous depressions, containing tufts of wool ; areoles prominent, circular, 

 felted, 4 to 5 mm. apart, spineless; flowers 3 cm. long, yellow. 



*The names given by Radl are as follows: amabile, bedinghausii, beguinii, conspicuum, imperiale, lapaixii, lesau- 

 nieri, mirabile, octogonum, princeps, regale, and schrfinzkyi. 



t Under this species Schelle lists the following hybrids: amabilis, amoenus, bedinghausi, beguinii, bellus, candidus, 

 cereiformis, cinerascens, cinerascens brevispinus, cinerascens crassisipinus, cinerascens longispinus, cinerascens parvi- 

 maculatus, conspicuus, cornutus, cornutus candidus, crenatus, darrahii, delaeti, diadematus, elegantissimus, erectns, 

 formosus, gardei, glabrescens, hanburyi, imperialis, incanus, incomparabilis, inermis, insignis, jusberii, lapaixi, laurani, 

 lesaunieri, lophothele, lopliotliele cereiformis, martini, mirabilis, nobilis, octagonus, pentagonus, pictus, princeps, quad- 

 ratus, rebuti, regalis, regulare, regulare spinosum, robustum, schilinskyi, schumannii, speciosus, spectabilis, spiralis, 

 splendidus, variegatus, weberi, and zonatus. 



