30 NORTH AMERICAN FLORA [VOLUME 33 
16. Franseria incana Rydberg, sp. nov. 
A perennial herb, somewhat woody at the base; stems 3-5 dm. high, white-hoary; leaves 
bipinnatifid, silky-canescent with long white hairs, less than 1 dm. long, petioled; blades ovate 
in outline; segments lanceolate to linear-lanceolate, acute; terminal segment of the upper 
leaves somewhat elongate; heads in leafy panicles, the staminate ones on peduncles scarcely 
more than 1 mm. long; involucre turbinate, about 2 mm. wide, silky-hirsute; lobes about 6, 
broadly triangular, obtuse or short-acuminate; paleae of the receptacle linear-filiform; pistil- 
late heads in small clusters in the axils and on the lower part of the staminate racemes, 1- 
flowered; fruit 2 mm. long, glandular-puberulent, reticulate; beak solitary, conic; spines 
short, slightly dilated below, hooked at the apex, more or less connected by ridges at the base 
and with deep pits. 
Type collected at Fort Huachuca, Arizona, September 1892, Dr. T. E. Wilcox (Columbia Univ. 
herb.). 
DISTRIBUTION: Arizona to Lower California and San Luis Potosi. 
17. Franseria acuminata Brand. Proc. Calif. Acad. II. 2: 171. 
1889. 
A perennial, shrubby at least at the base; stem about 6 dm. high, branched above, gla- 
brous or nearly so; leaves mostly alternate, bright-green, very sparingly strigose, 5-8 cm. 
long, 3-5 cm. wide, ovate-lanceolate or lanceolate in outline, pinnately divided to the midrib 
into 3-8 pairs of unequal, lanceolate, acuminate divisions, the terminal one long-acuminate; 
inflorescence racemose-paniculate; staminate heads numerous; involucre turbinate, glabrous, 
with 5-8 triangular mucronate lobes; paleae of the receptacle minute, somewhat clavate; 
pistillate heads in small clusters in the upper axils, l—or 2-flowered; fruit obovoid, about 5 mm. 
long, glabrous; spines 5-8, very short, rarely more than 0.5 mm. long, incurved, in two series; 
beak short, conic. 
TYPE LOCALITY: Purisima, Lower California. 
. 
IV. Eriocentrae. Low shrubs with straw-colored bark; leaves lobed or incised, gray or 
white beneath; heads paniculate; staminate involucre with 5—7 triangular lobes; paleae spatu- 
late, villous; anthers with triangular tips; fruit small, densely villous; beak solitary, the lobes 
not very unequal in length; spines straight. 
18. Franseria eriocentra A. Gray, Proc. Am. Acad. 7: 355. 1868. 
Gaertneria eriocentra Kuntze, Rev. Gen. 339. 1891. 
A shrubby perennial; branches hispidulous and slightly tomentulose; leaves lanceolate 
or oblanceolate in outline, short-petioled, cuneate at the base, acute at the apex, pinnately 
lobed or incised-dentate, somewhat hastately so, finely tomentulose, gray or white beneath, 
soon green above, 2—4 cm. long; inflorescence paniculate, leafy below; staminate heads on very 
short peduncles or subsessile; involucre saucer-shaped, about 4 mm. wide, glandular-hispidu- 
lous and tomentulose; lobes 5-7, triangular; paleae about as long as the corolla; corolla 
narrowly funnelform, pubescent, terete; lobes triangular; pistillate heads sessile, subtended 
by small lanceolate leaves, 1-flowered; body of the fruit 1-celled, spindle-shaped, 8 mm. long; 
beak conic-subulate, oblique at the apex, but not produced in a hook; spines 12-15, subulate, 
straight, long-hirsute, 6 or 7 in the upper series and the rest scattered below. 
TYPE LOCALITY: Providence Mountains, Arizona [probably California]. 
DISTRIBUTION: Southern Nevada and Utah, southeastern California, and western Arizona. 
V. Tomentosae. Perennial herbs, with creeping rootstocks; leaves pinnatifid, with few 
segments or the upper simple, white-tomentose beneath; heads in leafy panicles; staminate 
involucre with 12-14 rounded lobes; paleae linear-lanceolate, boat-shaped, 3-5-nerved; fruit 
small, 2-flowered; beaks 2, nearly straight; spines straight, subulate-conic. 
19. Franseria tomentosa A. Gray, Mem. Am. Acad. 4: 80. 1849. 
Gaertneria tomentosa Kuntze, Rev. Gen. 339. 1891. 
Gaertneria Grayi A. Nelson, Bot. Gaz. 34:35. 1902. 
