VASCULAR PLANTS OF NORTH DAKOTA 299 
The most common willow in the state. Leeds, York. 
ay 312. Salix linearifolia Rydb. in Britt. Man. 316. (1901). 
t Sand hills near Willow City (Bottineau Co.). 
313. Salix bebbiana Sargent, Gard. and For. 8:463. (1895). 
" Salix rostrata Richards. Frank. Journ. App. 753. (1823). 
> Not Thuill. (1799). 
One form coming very near to S. perrostrata Rydb. was found 
by the writer in Benson Co. 1906, and deposited in the Herbarium 
of Harvard University. é 
Leeds, Butte. 
3 314. Salix humilis Marsh. Arb. Am. r4o. (1785). 
¥ Butte. 
ro 315. Salix discolor Muhl. 1. c. 234, pl. 6, f. 1. (1803). 
Butte.. 
% 316. Salix petiolaris J. E. Smith, Trans. Linn. Soe. 6, p. 122 
_ (1803.) 
Butte. 
317. Salix candidula Nwd. in Am. Midl. Nat. Vol. III. p 
) 225. (1914). 
Salix candida Fluegge in Willd. Sp. Pl. 4, p. 708. (1806), not 
Plinius 1. c.=Salix witellina. 
i In boggy ravine, Butte. In deep gravel near. Willow City, 
(Bottineau Co.). 
‘ 318. Salix candidula x petiolaris. 
? Only one shrub in boggy ravine, Butte. 
£ 319. Salix chlorophylla Anderss. Ofv. Sv. Vet. Akad. 
_ Férhandl. Stockh. 6. 138. (1867). 
5 Kulm (La Moure Co.). Perhaps my identification is incorrect. 
320. Salix cordata Muhl. 1. c. p. 236. p. 6, fl. 3. (1803). 
Leeds, Butte, Peninsula of Lake Ibsen, Bismarck. 
Order 17. AMENTACEAE. 
4 (Ray, Boerhave) Gmelin, Fl. Sibir. I: 150. (1747); Juss. Gen. 
) 407. (1789); Bartling, Ord. Nat. Pl. 96. (1830). 
; Family 30. CORYLACEAE Mirbell ex S. F. Gray, Nat. 
mir. Br. Pl. Il. p. 244. (1821), in part. 
OSTRYA Plinius XIII: 21. 
321. Ostrya virginiana (Mill.) Willd. Sp. Pl. 4:469. (1805). 
Carpinus virginiana P. Miller, Gard. Dict. ed. 8. (1768). 
Fargo, (Lee, O. A. Stevens). 
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