110 
Fra. 406, Pune MACROCEPHALUS (Doell) Scribn. U. S. Dept- 
Div. Agros. Bul. 17: 110, f. 406. 1899. (C. tribuloides macrocephalus bec 
Bras. 22, 312. 1877, ex char.) ee SAND-BUR.—A coarse, much 
and leafy annual, with prost ascending culms 3-6 dm. (15-27) e 
dense spikes 2-8 em. ll E Tong: p paea s very cuni glabrous, rarely UY". 
ims Magn ciliate margins a aboy ve, often exceeding t inter 
le; ligule densely ciliat 
frin sting eaf-blades on thei. involute, 3-10 em. . (197-4) long long, glabrous. 1. wich 
eres or “ burs” (a) pubescent, about 8 mm. (4”) long an and 6mm. (3) bue 
many stout spines.—Sands alo: m the coast, Delaware, New Jersey, 
PM ki to Alabama and Mississipp Sout eri 
