THELOCACTUS. II 
7 % Thelocactus tulensis (Poselger). 
> Echinocactus tulensis Poselger, Allg. 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. 
Iistribution: 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 1: pl. 18; Schumann, Gesamtb. Kakteen 431. f. 74, 
as Echinocactus tulensis. 
Figure ro is reproduced from the first illustration cited above. 
Fic. 10.—Thelocactus tulensis. Fic. 11.—Thelocactus bicolor. 
10. Thelocactus loydii 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. 1922. 
_» Echinocactus bicolor Galeotti in Pfeiffer, Abbild. Beschr. Cact. 2: pl. 25. 1848. 
Echinocactus rhodophthalmus Hooker in Curtis’s Bot. Mag. 76: pl. 4486. 1850. 
Echinocactus rhodophthalmus ellipticus Hooker in Curtis’s Bot. Mag. 78: pl. 4634. 1852. 
Echinocactus ellipticus Lemaire, Jard. Fleur. 3: pl. 270. 1853. 
Echtnocactus bicolor schottit Engelmann, Proc. Amer. Acad. 3: 277. 1856. 
Echinocactus bolansis Riinge, Gartenflora 38: 106. 1889. 
Lchinocactus bicolor bolansis Schumann, Gesamtb. Kakteen 303. 1898. 
Echinocactus bicolor tricolor Schumann, Gesamtb. Kakteen 303. 1808. 
Echinocactus schottit Small, Fl. Southeast. U. S. 814. 1903. 
