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124 MISSOURI BOTANICAL GARDEN. 
Texas, abundant, where it is called Buffalo Bur, whence 
the specific name. Autumn. 
This very distinct species is more nearly related to Y. 
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, September 29, 1900, type. Arxansas: Fulton, 
Bush 2408, April 22, 1905, seedlings, with burs still 
attached. 
ANTENNARIA GREENEI n. sp. 
Floccose-woolly, stoloniferous, fertile and sterile plants 
in separate patches. Floweringstems stout, 1-2.5cm. tall; 
basal leaves cuneate-spatulate, obtuse, cuspidate, distinctly 
3-ribbed, long-petioled, silvery beneath, dark green above, 
becoming nearly smooth on the upper surface, 5-6 cm. 
long, including the long slender petiole, 1.5-2.5 cm. wide, 
those of the stolons cuneate-spatulate, acuminate, apex 
cuspidate, tapering from about the middle to each end, 
thickly covered beneath with silvery tomentum, appressed- 
pubescent above, strongly 3-ribbed, 8-13 cm. long, includ- 
ing 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; involucre 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. Stami- 
nate 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 capitate cluster; bracts 
oblong-spatulate, brownish and greenish and pubescent at 
base, the upper dilated portion white, erose-dentate all 
around the upper portion. 
