astrophytum. 
183 
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 Viesca, 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) FI. Radi* named and described twelve hybrids, while in 1907 Schelle f 
(Handb. Kakteenk. 151, 152) listed 59 hybrid names under Echinocactus 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; Bliihende Kakteen 2: 
pi. no; Engler and Prantl, Pflanzenfam. 3 6 ": f. 
56, E; f- 62; Monatsschr. Kakteenk. 6: 22; 12: 4; 
18: 9; 29: 141; Schumann, 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. 
Journ. 1: pi. for September; 164; Illustr. Hort. 8: 
pi. 292; Riimpler, Sukkulenten 188. f. 106; Orcutt, West Amer. Sci. 13: 3; Gartenflora 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 xxn, 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 Radi are as follows: amabile, bedinghausii, beguinii, conspicuum, imperiale, lapaixii, lesau- 
nieri, mirabile, octogonum, princeps, regale, and schilinzkyi. 
fUnder this species Schelle lists the following hybrids: amabilis, amoenus, bedinghausi, beguinii, bellus, Candidas, 
cereiformis, cinerascens, cinerascens brevispinus, cinerascens crassisipinus, cinerascens longispinus, cinerascens parvi- 
maculatus, conspicuus, cornutus, cornutus Candidas, crenatus, darrahii, delaeti, diadematus, elegantissimus, erectus, 
formosus, gardei, glabrescens, hanburyi, imperialis, incanus, incomparabilis, inermis, insignis, jusberti, lapaixi, laurani, 
lesaunieri, lophothele, lophothele 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. 
