190. Fernald---Relationships of some American 
The American forms of §§ Albae and Nanae now recog- 
nized by the writer and discussed in the preceding notes may 
be briefly enumerated as follows: 
B. arpa, L. Sp. ii, 982 (1753); Roth, Fl. Germ. i, 404. B. 
papyrifera, Marshall, Arbust. Am. 19 (1785). 2B. papyracea, 
Ait. Hort. Kew. iii, 337 (1789). 2B. pubescens, Ehrh. Beitr. v, 
160, vi, 98 (1790-91). B. odorata, Bechst. Diana, i, 74 (1797).— 
EWFOUNDLAND to ALASKA, south to PennsyLvanta, INDIANA, 
Nepraska, Wyomine, InaAno and Wasutneron ; passing on 
the Pacific coast to the dark-barked forma occidentalis (B. 
occidentalis, Hook. Fl. Bor.-Am. ii, 155 (1839)); IcELann, 
northern Evrorr and Asta, south in the mountains to northern 
Spain, Iraty, ete. (Pl. V, figs. 1-6. 
. ALBA, var. GLuTINosA, Trautv. ex Regel, Mon. Bet. 20 
(1861). B. glutinosa, Wallr. Sched. Crit. 497 (1822). B. 
pendula, Reichenb. Ie. Fl. Germ. xii, t. 625, not Roth.— 
Valley of Wassataquoik River, Marne; Swepen, Fiyvanp, 
GERMANY, SwitzERLANnD, AvsrrRiA. 
B. avpa, var. corpirot1a. £B. cordifolia, Regel, Mon. Bet. 
28, t. 12, figs. 29-36 (1861). B. alba, subsp. papyrifera, B, 
cordifolia, Regel in DC. Prodr., xvi, pt. i, 166 (1864). 2B. 
pupyrifera, var. minor, Wats. and Coult. in Gray, Man. ed. 6, 
472 (1889), in part, not B. papyracea var. minor, Tuck.— 
Laprapor and Newrounpianp to New Brunswick, Mare, 
gW Hampsuire, Lake Suprrtor, Iowa, Atsperta, British 
Cotumpta, Ipano, and Wasutneron. 
B. apa, var. minor. B. davurica, Ledeb., Fl. Alt. iv, 245 
(1833), not Pallas. B. papyracea, var. minor, Tuckerman, 
this Journal, xlv, 31 (1843). B. tontuosa, Ledeb., F1. Ross. iit, 
652 (1849). B 
Berna aupa, var. carpatica. B. carpatica, Wald. and 
Kit. in Willd. Sp. iv, 464 (1805). B. borealis, Spach, Ann. 
Sci. Nat., ser. 2, xv, 196 ey B. glutinosa, Fries, Summ. 
eg. Scand., 212 (1846), not Wallr. “2. pumila, Y; borealis, 
Regel, Mon. Bet. 55, t. 18, figs. 38, 39 (1861). B. alba, subsp. 
