98 THE CACTACEAE. 



The species is named for Dr. Barton W. Evermann, Director of the Museum of the 

 California Academy of Sciences, who organized the scientific expedition to the Gulf of 

 California in 192 1, which obtained this as well as many other new and rare plants. 



Related to this species, but perhaps distinct from it, is Johnston's No. 3 121 from 

 Nolasco Island, Gulf of California. It has fewer spines (about 10 radials and i or 2 

 centrals) . 



Figure 95 is from a photograph of plants from the type collection. 



42. Neomammillaria parkinsonii (Ehrenberg). 



Mammillaria parkinsonii Ehrenberg, Linnaea 14: 375. 1840. 

 Cactus parkinsonii Kuntze, Rev. Gen. PI. i: 261. 1891. 



Cespitose, somewhat depressed to cylindric, 15 cm. high, 7.5 cm. in diameter, globose, glaucous, 

 green; axils of tubercles lanate and setose; tubercles milky, short, conic; radial spines numerous 

 (20 or more), setaceous, short, white; central spines 2 or sometimes 4 or 5, brownish at tip; flowers 

 surrounded by a mass of wool, small, yellowish; inner perianth-segments apiculate; stigma-lobes 

 elongated; fruit clavate, scarlet, i cm. long; seeds brown. 



Type locality: At San Onofre in the Mineral del Doctor, Mexico. 



Distribution: Central Mexico. 



We haA^e a photograph, identified as this plant, sent us by L. Ouehl in 192 1, and also 

 specimens which are like this photograph, collected by Dr. Rose near Higuerillas, Oueretaro, 

 Mexico, in 1905 (No. 9798). 



The plant was named for John Parkinson, at one time British Consul-General in 

 Mexico, who died in Paris, April 3, 1847. 



Mammillaria parkinsonii rubra (Forster, Handb. Cact. 196. 1846) is only a name. 



Mammillaria parkinsonii waltonii we do not know, although it is frequently referred 

 to in cactus literature. Haage and Schmidt offer it for sale in their catalogue (1920) under 

 the name of M. waltonii Ouehl. 



Illustrations: Cact. Joum. i: pi. for March, as Mammillaria iivltonii; Gartenwelt 14: 

 232; MoUers Deutsche Gart. Zeit. 25: 475. f. 8, No. 15; Rother, Praktischer Leitfaden 

 Kakteen 39, as M. parkinsonii. 



Figure 94 is from a photograph sent by L. Ouehl. 



43. Neomammillaria geminispina (Haworth). 



Mammillaria geminispina Haworth in Gillies, Phil. Mag. 63: 42. 1824. 



Mammillaria bicolor Lehmann, Samen. Hamb. Gartz. 7. 1830. 



Mammillaria nivea W'endland in PfeiflFer, Enum. Cact. 27. 1837. 



Mammillaria daedalea Scheidiveiler, Hort. Beige 4: 16. 1837. 



Mammillaria toaldoae Lehmann, Linnaea 12: 13. 1838. 



Mammillaria eburnea Miquel, Linnaea 12: 14. 1838. 



Mammillaria nivea daedalea Lemaire. Cact. Gen. Nov. Sp. loi. 1839. 



Mammillaria nobilis Pfeiffer, Allg. Gartenz. 8: 282. 1840. 



Mammillaria bicolor longispina Salm-Dyck, Cact. Hort. Dsxk. 1844. 6. 1845. 



Mammillaria bicolor cristata Salni-D\-ck, Cact. Hort. Dj'ck. 1S44. 6. 1845. 



Mammillaria bicolor nobilis Forster, Handb. Cact. 198. 1846. 



Cactus geminispinus Kuntze, Rev. Gen. PI. i: 260. 1891. 



Cactus niveiis Kuntze, Rev. Gen. PI. i: 261. 1891. 



Cactus nobilis Kuntze, Rev. Gen. PI. i: 261. 1891. Not Lamarck, 1783. 



Mammillaria bicolor nivea Schumann, Gesamtb. Kakteen 569. 1898. 



Cespitose, or single in cultivation, cylindric, somewhat glaucous ; axDs woolly ; tubercles terete, 

 conic; radial spines numerous (16 to 20), very short, setaceous, white; central spines 2 to 4, stouter 

 and longer than the radials, about 25 mm. long, black-tipped; flowers dark red; inner perianth- 

 segments oblong, obtuse, serrate. 



Type locality: Mexico. 



Distribution: North-central Mexico. 



Mammillaria daedalea, which is referred here by Schumann, is based on an abnormal 

 specimen which has elongated, contorted stems and looks very unUke the typical plant. 

 Scheidweiler ihustrated his species. 



