1918] SCHNEIDER—SALIX 7 
I have seen specimens from Argentine, Chile, Uruguay, Paraguay, Bolivia, 
Peru, Colombia, and southern Brazil I do not have a correct understanding of 
the wild habitat of this species, most of the material before me coming, appar- 
ently, from cultivated plants. I suppose S. Humboldtiana inhabits river 
valleys in the cold and temperate region from the Straits of Magellan to 
southern Brazil in the east and Ecuador in the west. Farther north, in Colom- 
bia and on the West Indian Islands, it seems to be only planted, but may occur 
sometimes escaped from cultivation. In Central America and in Mexico it is 
represented by var. stipulacea. 
SPECIMENS EXAMINED.—I have not seen the type, which seems to be pre- 
served in WILLDENOW’s herbarium at Berlin, and I do not deem it necessary 
to enumerate here all the specimens I have seen because, as I have already said, 
most of them seem to be taken from cultivated plants.4 
S. Humboldtiana is apparently a well marked species, and I deal with its 
relationship to S. nigra under var. stipulacea. 
“ib. S. Humporptrana, var. stipulacea Schn., comb. nov.— 
S. Houstoniana Pursh, Fl. Am. Sept. 2:614. 1814. quoad specim. 
Houstonianum ex Herb. Banks; S. stipulacea Mart. and Galeotti 
in Bull. Ac. R. Brux. 10':343 (Enum. Pl. Gal. Mex. 3) 1843; 
S. Humboldtiana ***S. oxyphylia And. in K. Sv. Vet.-Akad. Handl. 
6:17 (Mon. Salic.). 1867, pro. parte; S. Humboldtiana y oxyphylla 
And. in DC. Prodr. 16*:199. 1868, pro parte; Bebb apud Smith 
Enum. PI. Guat. part 2:71. 1891; part 3:76. 1893; S. Humboldti- 
ana Mart. and Gal. in Bull. 1. c. non Willd.; Hemsl. in Biol. Centr. 
Am. Bot. 3:179. 1883, pro parte. 
A typo praecipue recedit foliis non distincte linearibus sed pl. 
m. lineari-lanceolatis fere a basi ad apicem sensim attenuatis apice 
plerisque distinctius caudato-acuminatis et basi magis cuneato- 
attenuatis, stipulis saltem ramulorum validorum distinctius evo- 
utis. 
TYPE LOCALITY.—State Hidalgo, ‘‘au bord du Rio Grande de Mextitlan 
[Metztitlan] prés du district de Real del Monte” (coll. H. Galeotti, no. 75, 
Martens and Galeotti). 
RanGE.—This variety seems to reach its most northern point in Hidalgo, 
from where its range extends southward into Guatemala, Salvador, and Costa 
Rica, but I am not sure whether it is really spontaneous in the last two countries. 
It is probably also planted, together with the type, on the West Indian Islands. 
4 An enumeration of all the specimens I have examined will be given in the final 
publication of my studies on American willows. 
