1918] SCHNEIDER—SALIX 19 
form the flowers of which appear with the development of the young leaves. 
Nevertheless, this most southern form of S. Bonplandiana needs further 
observation. The young twigs and the upper surfaces of the young leaves show 
a scanty pubescence of rather long downy silky hairs. TUERCKHEIM’s speci- 
mens have been regarded as belonging to S. laevigata by BEBB, but in my 
opinion they are much more similar to S. Bonplandiana than to the other 
species. 
Guatemala: Dept. Alta Verapaz, ‘‘am Cobanflusse bei Coban,” alt. 
1360 m., February 1886, A. v. Tuerckheim (no. 333, m., f.; G., W.; ab J. D. 
SmitH sub nomine Humboldtiana falcata distributa, praeterea a cl. BEBB S. 
laevigata nominata); same place, alt. 1360 m., November 1907, A. v. Tuerckheim 
(no. II. 1526, f., fr.; G., M., W.; eadem forma ac no. 333 sed folia novella 
superne laxe sericeo-villosa cito glabrescentia).—Dept. Baja Verapaz, between 
Tactic and Salanc4, June 5, 1904, O. F. Cook (no. 217, st.; W.)—Dept. 
Huehuetenango, roadside near Huehuetenango, alt. 1950-2600 m., Janu- 
ary 10-11, 1896, E. W. Nelson (no. 3677, m.; W.).—Dept. Solala, San Lucas, 
February 15-16, 1906, W. A. Kellerman (nos. 5693, 5819, st.; W.); Volcano of 
Santa Maria, alt. 2600-3500 m., January 24, 1906, E. W. Nelson (no. 3725, 
f., fr.; G., W.).—Dept. Sacatepequez, Santa Maria de Jesus, cult. in hedge, 
February 18, 1905, W. A. Kellerman (no. 4528, st.; W.). 
6b..S. BONPLANDIANA, var. PALLIDA And. in DC. Prodr. 16*: 200. 
1868; Hemsley in Biol. Centr. Am. Bot. 3:179. 1883; Brandegee in 
Proc. Cal. Acad. Sci. II. 2:205. 1889, fide auctor; Bebb apud 
Vasey and Rose in Contrib. U.S. Nat. Herb. 1:77. 1890.—S. pallida 
Kunth in Humb. and Bonpl., Nov. Gen. Pl. 2:20. 1817; S. Bon- 
plandiana *S. pallida And. in K. Sv. Vet.-Akad. Handl. 6:18 (Mon. 
Salic.). 1867. 
A typo nonnisi recedit ramulis novellis petiolisque satis vel parce 
villosulis foliis etiam saepe ad costam pl. m. pilosis. 
TyPE Locatiry.—‘In calidis regni Novae Hispaniae inter Venta de 
Acaguisotla et Masatlan™) alt. 500-650 hexap.” (coll. Humiboldt and Bonpland, 
ex Kunth). 
Rancr.—Central Mexico (probably also in Lower California). 
SPECIMENS EXAMINED.—State of San Luis Potosi, without exact locality, 
1877, J. G. Schaffner (no. 263, f.; W.); “in locis cultis circa urbem San Luis 
Potosi,” 1876, J. G. Schaffner (no. 895 partim, f.; G.; mixed with sterile speci- 
men of S. Humboldtiana var. stipulacea).—State of Puebla, Atlixco, July 25, 
August 1, 1893, E. W. Nelson (m.; W.; ramulis tantum apice parce pilosis).— 
State of Jalisco, near Huejuquilla, August 24, 1897, J. V. Rose (no. 2535, m.; 
ne Ser, localities which I cannot find on the maps at my disposal seem to be in 
‘ate of Guerrero according to Humb. and Bonpl., Nov. Gen. Pl. 7:341- 1825. 
