28 BOTANICAL GAZETTE [JANUARY 
Sect. V. SALICES DIANDRAE, excl. LONGIFOLIAE." 
12. S. Hartwect Bentham, Pl. Hartw. 52. 1840; Hemsl. in 
Biol. Centr. Am. Bot. 3:180. 1883.—S. humilis *S. Hartwegii And. 
in K. Sv. Vet.-Akad. Handl. 6:112, pl. 6, fig. 62* (Mon. Salic.). 1867; 
S. humilis § ?Hartwegit And. in DC. Prodr. 167:236. 1868.—Ad 
descriptionem brevem auctoris addenda et emendanda: habitus ?, 
ramuli hornotini (autumno floriferi) pl. m. dense griseo- vel flaves- 
centi-tomentelli, angulati, versus basim et annotini purpureo- 
fusci glabriusculi, vetustiores ut videtur glabri, lenticellis late 
ellipticis flavis paucis conspersi. Gemmae foliiferae ovatae sed 
rostratae, ventre subapplanatae, lateraliter leviter carinatae, 
glabrae vel apice sparse pilosae, ad 8 mm. longae. Folia elongato- 
lanceolata vel anguste elliptico-lanceolata, basi acuta vel subobtusa, 
satis subito in petiolum contracta, apice acuta vel brevissime 
tenuiter acuminata, 3.5:0.7ad9.5:1.6 cm. magna, superne intense 
viridia, ut videtur nitidula, initio etiam in facie sparse (an densius ?) 
pilosa, dein tantum ad costam subprominentem (et partim ad 
nervos laterales) tomentella, subtus discoloria, glaucescentia vel 
cinerascentia, pruinosa, initio pl. m. dense dein tantum ad nervos 
prominulos axillasque subbrunnescenti- vel griseo-villosulo-tomen- 
tella, costa elevata glabrescente, margine breviter et versus apicem 
distinctius glanduloso-denticulata. Petioli 2-8 mm. longi, superne 
sulcati, basi dilatati, undique tomentelli. Stipulae in ramis novellis 
satis distinctae, semicordatae, acutae, ad 7 mm. longae, glanduloso- 
denticulatae, ut folia pilosae. Amenta autumno in axillis foliorum 
adultorum apparentia, sessilia, brevia, densiflora, rhachi villosa, 
basi perula gemmarum suffulta; mascula ad 1.8:0.7 cm. magna; 
bracteae oblongae, apice truncatae, brunnescentes, praesertim ad 
basim utrinque longe pilosae; stamina 2, filamentis glabris liberis 
dein bracteas duplo superantibus; glandulae duae, ventralis ovato- 
rectangularis, quam bractea 3-3%plo brevior, dorsalis minor; 
amenta feminea ad 2:1 cm. magna, ut videtur recurvata; ovaria 
ovato-lanceolata, in stylum distinctum iis circ. 4-splo breviorem 
4I do not refer the following species to distinct sections because I do not yet 
know how to limit those sections to which these Mexican species belong. Some of 
them are very little known, and it needs further investigation to decide the question 
whether or not the species nos. 11-13 may form a special section on account of the 
dorsal gland present in the male flowers. 
