216 B. F. Bush: Plantae novae Texanae. 
This very distinct species is more nearly related to X. speciosum 
Kearney, but is easily distinguished from that species by the much larger 
burs which are of an entirely different shape. 
Specimens examined: Texas: Dallas County, Bush 1185, Sep- 
tember 29, 1900, type. Arkansas: Fulton, Bush 2408, April 22, 1905, 
seedlings, with burs still attached. 
8. Antennaria Greenei B. F. Bush, l. c., p. 124. 
Floccose-woolly, stoloniferous, fertile and sterile plants in separate 
patches. Flowering stems stout, 1—2,5 cm tall; basal leaves cuneate- 
spatulate, obtuse, cuspidate, distinctly 3-ribbed, long-petioled, silvery 
beneath, dark green above, becoming nearly smooth on the upper sur- 
face, 5—6 cm long, including the long slender petiole, 1,5—2,5 cm wide, 
those of the stolons cuneate-spatulate, acuminate, apex cuspidate, taper- 
ing from about the middle to each end, thickly covered beneath with 
silvery tomentum, appressed-pubescent above, strongly 3-ribbed, 8—13 cm 
long, including the long slender petiole which is as long as the blade or 
longer, and 2,5—4 cm wide; stem leaves sessile, oblong, obtuse or the 
upper acute, cuspidate; heads 6 to 9 in corymbose clusters, 6—8 mm 
broad; involuere about 6 mm high, the outermost bracts obtuse, the 
inner lanceolate, acute, all brownish and greenish, and pubescent at base, 
above with white tips; achenes minutely glandular. Staminate plants 
about 1 dm tall. Basal leaves similar to those of the fertile plant; stem 
leaves mostly linear-lanceolate; heads smaller, 6—7 mm broad, in a capi- 
tate cluster; braets oblong-spatulate, brownish and greenish and pubes- 
cent at base, the upper dilated portion white, erose-dentate all around 
the upper portion. 
Damp, sandy woods along the Trinity River, central Texas. Early 
spring. 
The species here proposed is most nearly related to A. occidentalis 
Greene, but is distinguished from that species by the exceedingly long- 
petioled leaves, which are about twice the length of those of that species, 
and much more pointed at apex. 
Specimens examined: Texas: Dallas County, Bush 644, May 7, 1900, 
type; Reverchon 330, April 1, 1900, type; March, 1880, type. 
9. Silphium Reverchoni B. F. Bush, l. c., p. 125. 
Stems apparently tall, very hispid with long white hairs which arise 
from papillae, much branched, the branches elongated. Leaves alternate; 
blades lanceolate to linear-lanceolate, 5—10 cm long, dentate-serrate or 
the uppermost nearly entire, both faces pilose with long white papillate 
hairs like those of the stem; lower leaves long-petioled, ovate-lanceolate, 
acute, sinuate-dentate or entire, with dense short pilose hairs which arise 
from papillae; petioles slender, terete, with long white papillate hairs; 
heads showy, very large; involucres campanulate, 2,5 cm high; bracts 
lanceolate, acute ciliate, densely papillose-hispid on the back, the outer 
ones 3 cm long, the inner shorter, obtuse; rays about 20, 3—4 cm long, 
hispid on the nerves, and ciliate; achenes not seen. 
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