SOME WESTERN SPECIES OF XANTHIUM. 61 
hook-like; beaks conspicuously longer than the prickles, 
more shortly hirsute, strongly incurved at apex. 
The type of this strongly marked species is of Mr. Suks- 
dorf's collecting from the banks of the Columbia, Sept., 1883, 
the specimen preserved in the U. S. Herbarium. Another 
specimen, with broader and less elongated foliage, is Sand- 
berg and Leiberg's n. 446 from Rock Island, Kittitas Co., 
Washington, July, 1893. 
X.GLANDULIFERUM. Rather slender, purple-stemmed, the 
upper part of the stem strigose-hispidulous: leaves rather 
small, long-petioled, not at all lobed, all of deltoid-ovate out- 
line, broadly cuneate and entire at base, doubly dentate 
from below the middle to the apex, strigose-hispid along the 
veins, the surface rather strongly strigose-scabrous: fruiting 
involueres oblong-ovoid, ? inch long, rather loosely echinate 
" with shortish prickles, these with some whitish hirsute hairs 
and many shorter gland-tipped ones, the body of the fruit 
also bearing many sessile or subsessile resin-glands; beaks 
slender-conical, white-hispid, divergent, incurved at tip. 
Collected at Walsh, Assiniboia, 15 Aug., 1895, by Mr. John 
Macoun, and distributed for X. Canadense, but the species 
evidently new, and thoroughly distinct. The ticket accom- 
panying my specimen bears the Canadian Survey number 
X. CAMPESTRE. Stout flexuous branched stems strongly 
angular, marked with short purple lines and sparsely sca- 
brous, the upper portion hispidulous: leaves of irregularly 
ovate-trigonous outline, not lobed, coarsely subsinuate- 
toothed and saliently dentate, the surface strongly muricate- 
scabrous: fruiting involucres narrow-ovoid, 1 inch long or 
more, densely echinate with long prickles which are rather 
shortly and sparsely ferruginous-hispid up to the middle, 
and with some sessile glands; beaks notably longer than 
the prickles, very stout and hispid, their tips little incurved. 
