1918] SCHNEIDER—SALIX 33 
_ fere omnino glabra, subtus glaucescentia, pruinosa, glabra sed 
ad costam nervosque elevatos partim ferrugineo-pilosa, rete 
nervillarum perspicue elevato, textura papyracea; petioli villosuli 
7-10 mm. longi. 
TYPE Locatity.—Mexico: Federal District, Eslava and mountains west of 
the City of Mexico (female) and Serrania de Ajusco (male). 
RANGE.—As above. 
SPECIMENS EXAMINED.—Mexico: Federal District, Eslava, thickets, alt. 
2300 m., April 14, 1904, C. G. Pringle (no. 13204, f*type; W.; “15-20 ft.”); 
mountain border west of the City of Mexico, April 26, 1840, J. Gregg (no. 680, 
f.; M.; “ro ft. high.”); Serrania de Ajusco, alt. 2700 m,, February 18, 1899, 
C. G. Pringle (no. 8047, m., paratype; G., M., W.; in Herb. N. mixed with 
fruiting SS. paradoxa; in Herb. A. mixed with female var. ? cana and a sterile 
branch which may belong to the male plant). 
I am not fully convinced that the female and male plants really belong to 
- the same species. The male plant may be the same as the female form called 
by me var. ? cana below. Certainly, RowLEE’s S. cana is not identical with 
the species of MARTENS and GALEoTtI. The description of these authors is 
rather incomplete, owing to the lack of fertile material, and I have not seen the 
type specimen. The statement “folia pollicaria,’’ however, which probably 
refers to adult leaves, excludes a form like S. Rowleei, of which the leaves are 
much larger. Besides this the type of S. cana M. and G. has not been collected 
“in the same region”’ as the plant before us, the Peak of Orizaba being about 
185 km. distant, as the crow flies, from the Cima de Ajusco. Furthermore, 
ROWLEE’s description does not apply exactly to all the specimens distributed 
under no. 6794 which RowLek cites as his type. The specimens in Herb. A., 
G.,M.,and W. consist only of female pieces which rather agree with the author’s 
Statement except (the base of the ovaries and) the pedicels being glabrous and 
* Not hairy. The male specimens which, I believe, belong to S. Rowleei are 
under Pringle’s no. 8047 in Herb. G., M., and W.; while in Herb. N. the true 
male plant is mixed with a fruiting branch of S. paradoxa (see later), and in 
Herb. A. I find on the sheet of no. 8047 a male S. Rowleei, a female S. Rowleei 
Var. ? cana, a sterile branch which may belong to S. Rowleei, and a branch in 
winter condition. RowLEE apparently describes male flowers of S. paradoxa 
or Its var. ajuscana because he states that the filaments are hairy, while those 
of no. 8047 before me are glabrous. The male plant of RowLEE therefore 
0 
airy base of the ovary) may possibly be of hybrid origin and represent 
Sates between S. paradoxa, var. ajuscana and typical S. Rowleei. After 
- Species and the following variety need further observation in the 
