1918] SCHNEIDER—SALIX 41 
on account of the presence of stomata in the upper epidermis of the leaves. 
They look to me like hybrids between this species and S. Gooddingii, but I do 
not know whether the last species ever has been found so far south in Lower 
California: Instead of it one of the parents with stomata in the upper surface 
of the leaves may be S. nigra var. Lindheimerii (or even S. Humboldtiana 
stipulacea). The male flowers are very similar to those of S. Bonplandiana, 
€ young branchlets and leaves are more or less pubescent (in no. 77 laxe 
subhirsuto-villosa), and the under surface of the (not yet mature) leaves is 
but slightly glaucous. Owing to the lack of female material, it is impossible to 
judge the form more correctly. 
SALIX (?), spec. nov.—Territorio de Tepic, in the Sierra Madre, 
near Santa Teresa, August 11, 1897, J. NV. Rose (st.; W.). These 
sterile branchlets seem to belong to a new species related to S. 
Schaffnerii, and may be described as follows: Ramuli hornotini apice 
pubescentia villosula griseo-brunnea vestiti, citissime glabrescentes 
et basim versus intense purpurascentes, glabri. Folia matura 
chartacea, anguste lanceolata, utrinque acuta vel apice subacumi- 
nata, minima 3:0.6 cm., maxima ad 9:1.2 cm. magna, dense 
glandul Bloss subserrato-denticulata, superne initio sparse puberula, 
cito glabra, intense viridia, costa nervisque subflavescentibus, 
subtus albescentia, pruinosa, initio densius pilosa, dein fere glabra, 
costa nervisque elevatis et’ reticulata. Petioli vix 5 mm. longi, 
superne sulcati et pilosuli. 
ARNOLD ARBORETUM 
