THEIvOCACTUS. II 



9. Thelocactus tulensis (Poselger). 



Echinocaclus tulensis Poselger, AUg. Gartenz. 21: 125. 1853. 



Plant simple to abundantly cespitose, globular to short-cylindric, up to 25 cm. high; ribs 8 to 

 13, strongly tubercled; radial spines 6 to 8, more or less spreading, 10 to 15 mm. long, brownish; 

 central spines solitary or sometimes 2, 3 cm. long; flowers 2.5 cm. long, rose-colored; inner perianth- 

 segments linear-oblong, acute. 



Type locality: Near Tula, Tamaulipas, Mexico. 



Distribution: Tamaulipas, Mexico. 



We have not seen this plant but we have seen two good illustrations. It is closely 

 related to Thelocactus hexaedrophorus. 



Illustrations: Bliihende Kakteen i: pi. 18; Schumann, Gesamtb. Kakteen 431. f. 74, 

 as Echinocaclus tulensis. 



Figure 10 is reproduced from the first illustration cited above. 



Fig. 10. — Thelocactus tulensis. 



-Thelocactus bicolo 



10. Thelocactus lloydii sp. nov. 



Plants simple, depressed-globose, 8 to 12 cm. broad, pale bluish green, strongly tubercled and 

 strongly armed ; tubercles conspicuous but low, often wider than long, sometimes 4 cm. wide ; flower- 

 ing groove rather conspicuous but narrow, extending from spines to about half-way to axil of tubercle ; 

 spines usually 8, sometimes with a smaller accessory one, all ascending from base and curved out- 

 ward from middle, terete or somewhat angled at base, often highly colored below with sharp yellow- 

 ish-crimson tips, the longer ones 6 cm. long; outer perianth-segments very pale purple, never deep 

 purplish pink; filaments white; anthers deep yellow; style yellowish, pinkish at top; stigma-lobes 

 pinkish yellow. 



Collected by F. E. Lloyd in northern Zacatecas, Mexico, May 25, 1908 (No. 33). 



11. Thelocactus bicolor (Galeotti) Britton and Rose, Bull. Torr. Club 49: 251. 

 Echinocaclus bicolor Galeotti in Pfeiffer, Abbild. Beschr. Cact. 2: pi. 25. 1848. 

 Echinocaclus rhodophthalmus Hooker in Curtis's Bot. Mag. 76: pi. 4486. 1850. 

 Echinocaclus rhodophlhalnnis ellipticus Hooker in Curtis's Bot. Mag. 78: pi. 4634. 

 Echinocaclus elliplicus Lemaire, Jard. Fleur. 3: pi. 270. 1853. 

 Echinocaclus bicolor schollii Engelmann, Proc. Amer. Acad. 3: 277. 1856. 

 Echinocaclus bolansis Riinge, Gartenflora 38: 106. 1889. 

 Echinocaclus bicolor bolansis Schumann, Gesamtb. Kakteen 303. 1898. 

 Echinocaclus bicolor tricolor Schumann, Gesamtb, Kakteen 303. 1898. 

 Echinocaclus schollii Small, Fl. Southeast. U. S. 814. 1903. 



1922. 



1852. 



