Stemmy Four Nerve Daisy

Tetraneuris linearis (Nutt.) Greene, Pittonia 3: 267. 1898
Aclinella scaposa linearis Nutt. Trans. Am. Phil. Soc. II. 7: 379. 1841. Ptilepida linearis Britton, Mem. Torrev Club 5: 340. 1894. Aclinella linearis A. Nelson; Coult. & Nels. Man. 560. 1909.
A scapose cespitose perennial, with a woody branching caudex, almost suffruticose ; branches elongate, 5-15 cm. long, ascending or decumbent; leaves crowded; blades narrowly linear, sparingly long-hairy and conspicuously punctate; scape 10-15 cm. long, strigose; involucre 5-6 mm. high, 8-10 mm. broad, villous; bracts elliptic, acute; ligules 8-10 mm. long, 4-6 mm. wide, strongly veined; disk-corollas 3 mm. long, puberulent; tube very short; achenes densely hirsute, 3 mm. long; squamellae lanceolate, acuminate, 2 mm. long.
Type locality: Texas.
Distribution: Texas, New Mexico, Chihuahua, and Coahuila.

Tetraneuris fastigiata Greene, Pittonia 3 : 268. 1898
Tetraneuris slenophylla Rydb.; Britton, Man. 1009. 1901. Aclinella fastigiata A. Nelson; Coult. & Nels. Man. 560. 1909.
An acaulescent perennial, branching underground; leaves crowded; blades narrowly linear, 2-4 cm. long and about 2 mm. wide, sparingly long-hairy, glabrate, conspicuously punctate, the bases broadened and 3-ribbed; scape 5-10 cm. high, strigose; involucre 6 mm. high, 10-12 mm. broad; bracts oval, obtuse or acutish, more or less villous; ligules about 10 mm. long and 4 mm. wide; disk-corollas 3 mm. long; tube very short; achenes 3 mm. long, densely hirsute; squamellae 2 mm. long, ovate-lanceolate, acuminate.
Type locality: Coolidge County, Kansas. Distribution: Plains of Kansas and Colorado.

Tetraneuris angustifolia Rvdb. Bull. Torrey Club 32 ; 128
1905.
An acaulescent cespitose perennial, but the branches of the caudex rather slender, short; leaves clustered, linear-oblanceolate to linear, 4-10 cm. long, 3-5 mm. wide, loosely and sparingly long-villous, or glabrate in age, not densely villous at the base; scape 2-3 dm. long, strigose; involucre hemispheric, 6 mm. high, about 10 mm. broad, densely villous; bracts oblong, obtuse, densely villous; ligules about 1 cm. long and 4 mm. wide, conspicuously 4nerved; disk-corollas 3.5 mm. long; tube 1 mm. long; achenes 3 mm. long, densely hirsute; squamellae 2 mm. long, lanceolate, acuminate.
Type locality: White Mountains, New Mexico. Distribution: New Mexico, Colorado, and Texas.

Tetraneuris angustata Greene, Pittonia 3 : 267. 1898
A perennial, with a rather slender cespitose rootstock; leaves narrowly linear, 5-10 cm. long, about 1 mm. wide, sparingly hairy and punctate; scape about 2 dm. long, slender; involucre 5-6 mm. high, about 10 mm. broafd, densely silkyvillous; bracts elliptic, obtuse; ligules 10-12 mm. long, 5-6 mm. wide; disk-corollas 3 mm. long, glandular-puberulent; tube less than 1 mm. long; achenes 3 mm. long, hirsute; squamellae ovate, 1.5 mm. long, the midrib produced into a short awn..
Type locality: State of Chihiiahua. Distribution: Chihuahua.

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, longvillous 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, puberulent; 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.