104 NORTH AMERICAN FLORA [Volume 34 



6. Tetraneuris trinervata Greene, Pittonia 3: 267. 1! 



A subacaulescent perennial, with a short thick caudex covered with remnants of leaves 

 and long brown hairs; leaves crowded on the caudex, very narrowly linear-spatulate, 3-5 cm. 

 long, 1-2 mm. wide, with a broader 3-ribbed base, densely silky-canescent or the bases glabra te; 

 scape 5-12 cm. long, appressed-silky; involucre about 6 mm. high and 10 mm. broad; ligules 

 about 7 mm. long and 3 mm. wide, sparingly pubescent; disk-corollas 3 mm. long; achenes 

 densely hirsute, 2.5 mm. long; squamellae about 2 mm. long, lanceolate, merely awn-pointed. 



Type locality: Sandia Mountains, New Mexico. 

 Distribution: Colorado and New Mexico. 



7. Tetraneuris scaposa (DC.) Greene, Pittonia 3: 266. 1898. 



Cephalophora scaposa DC. Prodr. 5: 633. 1836. 

 Actinella scaposa Nutt. Trans. Am. Phil. Soc. II. 7: 379. 1841. 

 Gaillardia Roemeriana Scheele, Linnaea 22: 161. 1849. 

 Actinella lanuginosa Buckl. Proc. Acad. Phila. 1861: 459. 1862. 

 Ptilepida scaposa Britton, Mem. Torrey Club 5: 340. 1894. 

 Picradenia scaposa Britton; Britt. & Brown, 111. Fl. 3: 449. 1898. 



An acaulescent perennial, with a short and somewhat branched but not thick caudex; 

 leaves densely crowded at the base, oblanceolate, entire or some of them 3-5-lobed, 3-5 cm. 

 long, covered with long loose white, or in age, ferruginous hairs; scape 5-15 cm. long, long- 

 villous with ascending hairs; involucre 6-7 mm. high, 10-12 mm. broad, densely villous; 

 ligules 10-15 mm. long, 5 mm. wide, conspicuously nerved; disk-corollas 4 mm. long, puberu- 

 lent; tube 0.5 mm. long; achenes densely hirsute, 3 mm. long; squamellae ovate, 2 mm. long, 

 the midrib excurrent into a short awn. 



Type locality: Eastern Texas. 

 Distribution: Texas and New Mexico. 

 Illustration: Britt. & Brown, 111. Fl. /. 3969. 



8. Tetraneuris lanigera Daniels, Univ. Missouri Stud. Sci. 2 2 : 



245. 1911. 



Actinella lanala Nutt. Trans. Am. Phil. Soc. II. 7: 379. 1841. Not A. lanala Pursh. 1814. 

 Tetraneuris lanata Greene, Pittonia 3: 265. 1898. 



A densely cespitose acaulescent perennial, with a very thick woody caudex; leaves crowded 

 at the base, narrowly linear-oblanceolate, 3-5 cm. long, 2-5 mm. wide, sparingly long-villous, 

 in age sometimes glabrate, but the base always with long hairs; scape 3-8 cm. (rarely 8-15 

 cm.) long, long-villous; involucre long-villous, 7-8 mm. high, 10-18 mm. broad, densely 

 villous; ligules 6-8 mm. long, 3-3.5 mm. wide; disk-corollas 4 mm. long, puberulent; tube 

 nearly 1 mm. long; achenes densely hirsute, 4 mm. long; squamellae lanceolate, acuminate, 

 3-4 mm. long. 



Type locality: "Three Buttes" of the Upper Platte [Wyoming]. 

 Distribution: Wyoming, Colorado, and New Mexico. 



9. Tetraneuris brevifolia Greene, Pittonia 3 : 266. 1898. 



Aclinea integrifolia Torr. Ann. Lye. N. Y. 2: 213. 1827. Not A. integrifolia H. B. K. 1820. 

 Tetraneuris acaulis caespitosa A. Nelson, Bot. Gaz. 28: 127. 1899. 

 Actinella acaulis caespitosa A. Nelson; Coult. & Nels. Man. 558. 1909. 



An acaulescent perennial, with a strongly cespitose woody caudex, usually branching under- 

 ground, and forming tussocks; branches densely covered by remnants of old leaves; leaves 

 crowded, linear-spatulate, 1-2 cm. long, long-hairy, with conspicuous broad bases; scape 1-3 

 cm. (rarely 3-5 cm.) long, loosely villous; involucre 6-7 mm. high, 7-10 mm. broad, densely 

 villous; ligules 4-5 mm. long, 2.5-3 mm. wide; disk-corollas 3 mm. long, puberulent; tube 

 0.5 mm. long; achenes densely hirsute, 2.5 mm. long; squamellae lanceolate, 2.5-3 mm. long, 

 acuminate. 



Type locality: Summit of a bleak ridge above timberline, Piles Peak/Colorado. 

 Distribution: Wyoming and Colorado. 



