190 



warty; staminate catkins 2 cm. long, sessile; pistillate ones 

 shortly ellipsoid, 8-io mm. long and 6-7 mm. in diameter, on 

 pedicels 3-15 mm. long. 



It most resembles A. vmdis, but is easily distinguished by the 

 thinner, more shining leaves, which are always more or less lobed 

 and quite without any development of pubescence. In A. inridis the 

 veins on the lower surface are more or less ferruginously puberu- 

 lent. In the same species the pistillate catkins are generally over 

 I cm. long. A sinuata has also been confounded with A. tenui- 

 folia Nutt, which, according to Sargent, is an older name for A. 

 incana glauca Kegel or A. incana virescens Wats. I have not ac- 

 cess to Nuttall's Sylva and am not able to verify this point. In the 

 plate of A. temdfolia, in the Silva of North America, the leaves re- 

 semble more the present species than A. incana glaiica, but Prof. 

 Sargent's description and synonymy belongs evidently to the lat- 

 ter. In A. temiifolia, i. e., A. incana glaiica, the leaves have much 

 rounder lobes and less sharp dentations, are less acuminate, thicker, 

 and generally somewhat pubescent on the veins. The pistillate 

 catkins are, as a rule, nearly sessile on the common peduncle. 



It is fairly common in the mountain regions of Montana. 

 (Flodman, no. 369, Spanish Basin, July 10, 1896.) In the Colum- 

 bia herbarium there are three specimens of this species, viz. : one 

 collected by Mertens at Sitcha, one by Scouler (no. 59) from the 

 Columbia, and one received from Hooker, but without any in- 

 dication of collector or locality. Probably it was collected by 

 Douglas. 



Urtica cardiophylla n. sp. 



Urtica dioica (?) Rydberg, Contr. Nat. Herb. 3: 179- 1895. 



Stem about i m. high, angled and striate and, as well as the 

 leaves, nearly devoid of bristles ; leaves broadly cordate, or the 

 upper somewhat narrower, 6-10 cm. long, coarsely toothed, very 

 thin, dark green, perfectly glabrous and shining; petioles about 3 

 cm. long, very slender; flower clusters small, rather few-flowered, 

 in the specimens seen scarcely more than half as long as the peti- 

 oles ; stipules linear-lanceolate, 5-10 mm. long, very thin. 



On a wooded creek bank, near Castle, Montana. Aug. i, 1896, 

 J. H. Flodman, no. 370. A specimen was collected by the author 

 near Whitman, Neb., in 1893. In the report it was doubtfully re- 



