10 NORTH AMERICAN FLORA [Voi^UME 34 



2. Baileya pleniradiata Harv. & Gray; A. Gray, Mem. Am. Acad. II. 



4: 105. 1849. 



Baileya tnuUiradiata pleniradiata Coville, Contr. U. S. Nat. Herb. 4: 133. 1893. 

 Baileya nervosa M. E. Jones, Contr. W. Bot. 8: 34. 1898. 



A floccose annual; stem 2-3 dm. high, leafy, branched from the base, loosely woolly; lower 

 leaves oblanceolate in outline, densely villous, 5-8 cm. long, more or less pinnatifid with linear 

 or oblong divisions, the uppermost usually entire and linear; heads at the ends of the branches; 

 peduncles 3-8 (rarely 9-10) cm. long; involucre hemispheric, about 8 mm. high and 10 mm. 

 broad; bracts 20-30; ligules 20-35 (rarely 40), obovate-oval, 8-9 mm. long and about 6 mm. 

 broad, undulately 3-toothed at the apex; disk-flowers 40-50; corollas 4 mm. long, glandular- 

 granulif erous ; achenes tapering downward from the truncate apex, 4 mm. long, glandular- 

 scabrous, angled, some of the ribs being stronger. 



Type locality: California. 



Distribution: Southern part of California, Nevada, and Utah, western Arizona, and northern 

 Sonora. 



3. Baileya Thurberi Rydberg, sp. nov. 



A biennial or perennial; stem 2-4 dm. high, erect, simple at the base, much branched and 

 leafy above, rather loosely floccose ; branches ascending; leaves, except the uppermost, spatulate 

 or cuneate in outline, 1-3 cm. long, lobed or divided into obovate divisions, densely floccose; 

 peduncles terminating the branches, 5-10 cm. long; involucre hemispheric, 5-6 mm. high, about 

 1 cm. broad; bracts about 40, linear-lanceolate; ligules 30-40, oblong, abruptly tapering at the 

 base, with 3 rounded-ovate teeth at the apex, about 8 mm. long and 4 mm. wide; disk-flowers 

 numerous; corollas about 3 mm. long, glandular-granulif erous ; achenes about 3 mm. long, 

 scabrous-hispidulous as well as glandular-granuliferous, tapering downwards, the ribs on the 

 angles slightly stronger than the rest. 



Type collected along the Pecos [Texas] 1850, Thurber 132 (herb. N. Y. Bot. Gard.). 

 Distribution: Western Texas, New Mexico, and Coahuila. 



4. Baileya perennis (A. Nelson) Rydberg, sp. nov. 



Baileya pleniradiata perennis A. Nelson, Bot. Gaz. 47: 431. 1909. 



A floccose perennial ; stem branched at or near the base, floccose ; branches erect, simple, 

 leafy, about 3 dm. high; leaves 4-6 cm. long, nearly all pinnatifid with oblong or linear divisions, 

 only the uppermost entire and linear; peduncles terminal, 5-15 cm. long; involucre hemispheric, 

 5-6 mm. high, 12-14 mm. broad; bracts 30 or more, linear-lanceolate; ligules 30-40, cuneate- 

 oblong, 10-12 mm. long, 4 mm. wide, tapering at the base, with 3 broadly ovate teeth; disk- 

 flowers numerous; corollas 4 mm. long, glandular-granuliferous; achenes 3.5 mm. long, glandu- 

 lar-granuliferous, tapering downward from the truncate summit, angled, the ribs of the angles 

 much stronger than the rest. Forms intermediate between this and the next preceding and 

 next following species are sometimes found. 



Type locality: Moapa, Nevada. 



Distribution: Southern Nevada to Arizona and Chihuahua. 



5. Baileya multiradiata Harv. & Gray; Torr. in Emory, 

 Notes Mil. Recon. 144. 1848. 



Baileya multiradiata nudicaulis A. Gray, Syn. Fl. N. Am. P: 318. 1884. 

 Baileya pleniradiata multiradiata Kearney, Trans. N. Y. Acad. Sci. 14: 42. 1894. 



A floccose biennial; stem 2-3 dm. high, decumbent and branched at the base, leafy only 

 below, densely white-floccose ; basal leaves numerous, spatulate, 3-5 cm. long, the earlier 

 3-lobed and crenate, the later deeply 3-cleft and lobed, densely white-floccose; lower stem- 

 leaves similar or more pinnatifid with obovate divisions, the uppermost entire; heads solitary 

 on long terminal peduncles, which are 1-2 dm. long; involucre hemispheric, 7-8 mm. high, 

 12-15 mm. broad; bracts 25-35, linear-lanceolate; ligules 35-50, cuneate-oblong, tapering at 

 the base, about 1 cm. long, with 3 broadly ovate teeth at the end, orange, turning pale- 

 yellow in age; disk-flowers very numerous, glandular-granuliferous, about 4 mm. long; achenes 



