1921] SCHNEIDER, NOTES ON AMERICAN WILLOWS. XI 187 



in the New World, S. irrorata is easily distinguished from all the other 

 Cordatae by the glaucous bloom on its branchlets. 



I have seen good material from New Mexico (Rio Arriba, Santa F^, 

 San Miguel, Lincoln, Otero, Grant, Sierra and Socorro Counties), and 

 Colorado (Conejos, Fremont, El Paso, Denver and Larimer Counties). 

 Ball in 1909, states that it also occurs in southwestern Texas, In Arizona 

 (Navajo, Cochise, Ima and Santa Cruz Counties) and in New Mexico 

 (Socorro County) a form with tomentose twigs occurs which much re- 

 sembles S. lasiolepis to which S. irrorata, probably, is most closely related. 



55. S. lasiolepis Benthara, PI. Hartw. 335 (1857). — Andersson in 

 dfv. Svensk. Vet.-Akad. Forh. xv. 118 (1858); in Proc. Am. Acad, iv, 

 58 (Sal. Bor.-Am. 12) (1858); in De CandoUe, Prodr. xvi.^ 264 (1868). 

 Bebb apud Watson, Bot. Calif, ii. 86 (1879). — Britton & Shafer, N. Am. 

 Trees, 198, f. 159 (1908). — Rydberg, Fl. Rocky Mts. 193 (1917). 

 Schneider in Bot. Gaz. lxv. 31 (1918). — ? S. humilis B, angustifolia f. 

 opaca Andersson in De CandoUe, Prodr. xvi.^ 236 (1868), sec. specim. 

 Wright no. 1878. — This species which according to Jepson is "the most 

 common willow in the foothill country throughout the state" of Cali- 

 fornia has been described from specimens collected by Hartweg in 1848 

 under no. 1955 (167) '*on the banks of the river Salinas and Carmel 

 near Monterey" according to the type inHerb. Kew. It also occurs in 

 Lower California (and possibly in New Mexico) and Oregon. I am, 

 however, not sufficiently acquainted with the species and the following 

 varieties retained by Ball according to its MS. -list. It is probably the most 

 arborescent species of this group reaching a height of more than 10 m. 



In 1857,* Torrey, Bot. Pacif. R. R. Exped. iv. 139, described a S. Bi- 

 gelovii from specimens collected by Dr. Bigelow in 1854, on April 8, near 

 San Francisco, of which I have seen the type. This species has been 

 mentioned by Andersson In Ofv. Svensk. Vet.-iVkad. Forh. xv. 118 (1858); 

 ill Proc. Am. Acad. iv. 58 (Sal. Bor.-Am. 12) (1858); in Walpers, Ann. 

 Bot. V. 747 (1858) [S, Blgelowii] and also in Svensk. Vet.-Akad. Handl. 

 VI. 163, t. 8, fig. 94 (Monog. Salic.) (1867). In the last place he describes 

 two varieties: latifolia and angustifolia without indicating a type for 

 either form but citing besides Bigelow's specimen one from "Bokara 

 (sec. Herb. Hook.)" a quotation unintelligible to me. In his monograph 

 Andersson has also a S. Bigelowii *S, fuscior which he made S. Bigeloicii 

 /3, fuscior mDa CandoUe, Prodr. xvi.^ 255 (1868) "in America septen- 

 trionali (Herb. Hook.)." He does not give the exact locality of the 

 name of the collector of his type stating only that there were five different 

 specimens on the same sheet in Hooker's herbarium of which "duo ver- 

 similiter ad 5. humilem recurvatam sunt referenda" while one is "S. lasio- 

 Jepidi exacte simile" and the remaining two seemed to be closely related 

 to S. Bigeloicii. Without having seen this type of var. fuscior I cannot 



* The title-page of vol. iv bears the date of 1850 but the preface of Torrey's article is dated 

 Jan. 1857. See also Hooker in Jour. Bot. IX. 377 (1857). 



