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A STUDY OF EUTHAMIA. 75 
margin, otherwise glabrous, rather firm, obscurely punctate: 
heads 3 to 7 at the ends of rather long and slender perfectly 
glabrous pedicels, the whole inflorescence more lax than in re- 
lated species described above: bracts of involucre much less 
imbricated, the outer short, green-tipped, the inner abruptly 
much elongated, without green tips. 
Species of the middle Mississippi Valley from Illinois and 
Missouri southward, in rather sandy soil. An excellent type is 
in my herbarium from the banks of the Mississippi at Oquawka, 
Ill., by H. N. Patterson, Sept. 1876. With its slender habit, 
narrow foliage, and little imbricated involucre, the species in 
rather strong contrast to the eastern Æ. Nuttallii and the still 
more westerly Æ. camporum, to both of which it is strictly allied. 
E. PULVERULENTA. Apparently 2 to 4 feet high, rather freely 
branched from the middle with long and strict, or shorter and 
fastigiate branches, all very rigid, striate, glabrous: leaves 2 or 
3 inches long, subcoriaceous, linear, acute at both ends, closely 
impressed-punctate, 1-nerved, glabrous, the margins showing, 
under a lens, remote callosities, these rarely amounting to scab- 
rous points: heads rather large, numerous and crowded but 
mostly pedicellate ; bracts of the turbinate involucre very firm 
and rigid, much imbricated, all with triangular and acute, or 
more rounded tips, these externally granular-puberulent, or 
rather pulyerulent, this indument universal on the back of the 
short exterior ones and on the pedicels: rays rather many but 3 
short; disk-flowers more numerous. 
With its thick almost coriaceous leaves, and its somewhat 
farinose inyolucres and pedicels, this species is as indubitable 
as its habitat is restricted. It is known only from the vicinity 
of Hockley, southeastern Texas, where it was collected in 1890 
by Mr. F. W. Thurow. The type specimens are in the U. 8. 
Herbarium. os 
_ E. QYMNOSPERMOIDES. Allied 5 E. leptocephala, but stouter, 
firmer, freely branched from near the base, 2 feet high, ssa 
