40 BOTANICAL GAZETTE [TANUARY 
den Thialern der westlichen Sierra Madre, 2250-2450 m. hoch,” 
. April 16-17, 1906 (no. 1225a, 1226). I have not seen any form 
from this state which agrees with v. SEEMEN’s description, and 
unfortunately I have not been able to compare the type. Judging 
by the ample description, it seems to me that this species must 
be very similar to S. cana sensu meo. The narrow lanceolate 
leaves measure up to 1.6 cm. in length and 0.3 cm. in width; the 
aments are described as ‘‘coetanea, sessilia, basi foliis parvis obsita, 
parva, subglobosa, usque 0.7 cm. longa et lata’; and the- fruits 
are “‘stipata (stipite capsulae dimidium aequante, dense incano- 
pubescente), e basi ovali conica, dense incano-pubescentia, stylus 
brevissimus, stigmata brevia emarginata capitellata; glandula 1 
posterior, ovalis, truncata, capsulae stipitis dimidium aequans.” 
After all, S. Endlichit may be a rather glabrescent form of S. cana 
or a closely allied species. 
There are several Mexican specimens left which I believe may 
be regarded as of hybrid origin, or partly even as new species. At 
the present time I can only enumerate them, adding a few remarks. 
We need a much better understanding of the Mexican willows and 
more copious material of the forms i in question before we can obtain 
a correct opinion of them. 
(?) 1bX6. S. HumMBoLDTIANA, var. STIPULACEA XS. BONPLAN- 
DIANA.—State of Oaxaca, valle de Etla, alt. 1580 m., April 1906, 
C. Conzatti (no. 1722, fr.; W.). 
It differs from the first in the smaller, more narrowly lanceolate subcon- 
colorous leaves, which measure up to 10 by 1.2 cm. and possess numerous 
stomata inthe upper epidermis. The branchlets are finely puberulent and 
dull reddish brown; the dense curved fruiting aments borne on short leafy 
peduncles (1 cm.) measure about 4by1cm. The influence of S. Bonplandiana 
may be seen in the comparatively broader and firmer leaves with a pale under 
surface, and in the stouter aments. Possibly, however, it may be nothing but 
a form of var. stipulacea. 
(?) 3x6. S.GooppincirX S$. BONPLANDIANA (vel spec. nov. ?).— 
Southern Lower California: La Paz, January 20 to February 5, 
1890, E. Palmer (no. 77, m.; W.); same locality, June 14, 1897, 
J. N. Rose (no. 1308, m.; W.). 
The first specimen is named S. Bonplandiana var. pallida, the second 
S. Bonplandiana, but both do not represent the type or a form of this species 
