1919] SCHNEIDER, NOTES ON AMERICAN WILLOWS. V 18 



i 



New Mexico. Dona Ana County: Las Cruces, Experiment Station, June 13, 

 1911, C. /?. Ball (No. 1739, fr.; G., M., O.; "large tree"); Valley of.the Rio Grande, 

 near La Mesilla, June 19, 1858, S. Hayes (fr.; CO; at Mesilla, April, 1897, T. D, A, 

 Cockerell (m., f.; N,); same locality, alt. 1150 m., June 21, 1897, E, F. Wooton 

 (No. 44, fr.; G., M.; in St. forma foliis subtus concoloribus porro observanda); in 

 the Mesilla Valley, alt. circ. 1150 m., April 19, 1907, E. F. Wooton & I\ Standley 

 (No. 3242, m.; C, M.). Sierra County: Tierra Blanca, 1904, /. A^. Beats (fr.; A.). 

 Otero County: Sacramento Mts., Fresnal Canyon, below High Rolls, alt. 1800 m., 

 August 26, 1916, A. Rehder (No, 445, St.; A.). 



Sect. IIL Pentandrae Dumortier, subsect. Lucidae, subsect. nov. 

 Sect. Fragiles Andersson in Ofv. Svensk. Vetensk. Akad. Forh. xv. 115 



■ 



(1858), ex parte. — Sect. Lucidae sive sect. Pentandrae Andersson in 

 Svensk. Vetensk, Akad. HandL vi. 30 (Men. Salic.) (1867), ex parte. 

 Sect. Pentandrae Ball in Coulter & Nelson, N. Man. Rocky Mts. Bot* 130 

 (1909), non Dumortier. 



At present I think it best to keep the American forms which are most 

 closely related to S. pentandra L. in a special subsection, although S, seris' 

 sima may perhaps be more correctly referred to the true Pentandrae. 



5. S. serissima Fernald in Rhodora, vi. 6 (Dec. 28, 1903); Robinson & 

 Fernald, Gray's Man. 322, fig. 645 (1908). — Britton & Brown, 111. Fl. ed. 

 2, I. 594, fig. 1455 (1913). — Rydberg in Britton, Man. FI. N. St. Can. 

 ed. 2, 1061 (1905); Fl. Rocky Mts. 191 (1917). — ? S. {pentandra) lucida 

 ovatifolia densiflora Andersson in Ofv. Svensk. Vetensk. Akad. Forh. xv. 

 115 (1858); in Proc. Am. Acad. iv. 54 (Salic. Bor.-Am. 8) (1858). — ? 5. 

 {pentandra) lucida pilosa Andersson in Ofv. Svensk. Vetensk. Akad. Forh. 

 XV. 115 (1858), pro parte. — ? S. {pentandra) lucida var. angustifolia f. pilosa 

 Andersson in Proc. Am. Acad, iv, 54 (1858), pro parte. — ? S. lucida an- 

 gustijolia rigida Andersson in Svensk. Vetensk. Akad. Handl. vi, 32 (Monog. 

 Salic.) (1867), pro parte. — ? S. arguta erythrocoma Andersson 1. c. 33. 

 ? S. erythrocoma Barratt ex Andersson L c, pro synon. — Rydberg, FL 

 Rocky Mts. 191 (1917), an tantum ex parte ? — S. arguta *>S. palleseens 

 Andersson in Svensk. Vetensk. Akad. HandL, vi. 32 (1867), prob. incl. f. 

 hirtisquama Andersson, 1. c. 34, sed. excl. f. alpigena Andersson, 1. c. 33. 

 iS. arguta Sy palleseens Andersson in De CandoUe, Prodr. xvi.^ 206 (1868). 

 S. lucida ovalifolia Andersson, 1. c. 205 (1868). — S. lucida serissima Bailey 

 apud Arthur in Bull. Geol. Nat. Hist. Surv. Minn. iii. 19 (1887). — For 

 further synonymy and literature see Fernald in Rhodora vi. 7 (1903). 

 This interesting and well-marked species has always been confused with S. 

 lucida or S, amygdaloidesy until its characteristic features were recognized 

 by Bailey and later wnth more preciseness by Fernald. Unfortunately Fer- 

 nald did not pay attention to the forms described by Andersson and enum- 

 erated above in the synonymy. Andersson had to deal with little and in- 

 suflBcient material, therefore, he w^as, apparently, not able to get a clear 

 understanding of the different forms he referred to S. lucida and S. arguta. 

 Without having seen all the material upon which Andersson based his de- 

 scriptions it is impossible to elucidate his varieties and forms, but there can 



