192 
spines, and the leaves are constantly much narrower. In 
«. we have frequently observed four pairs of leaflets on 
the petiole. 
304. (20.) A. Uspallatensis, (Gill. mst.); fruticosa, subrobusta, 
spinis dichotomis subgracilibus, foliis 4-5-jugis, foliolis 
parvis linearibus canaliculatis, racemis perbrevibus sub- 
umbellatis, dentibus calycinis brevibus acutis, legumini- — 
bus (?)—Near Los Hornillos, a little way below the top of 
Paramillo de las Minas de Uspallata. Dr. Gillies —In : 
habit, this is, to a degree, intermediate between the twolast, 
but is more allied to 4. horrida, differing chiefly in the 
greater number of leaflets. 
305. (21.) A. pinifolia (Gill. mst.) ; fruticosa, erecta, glabra, 
.. ramis strictis gemmas foliiferas gerentibus, spinis paucis 
brevibus validis parce ramosis, foliis 3-jugis, foliolis fili- - 
- .formibus, racemo. brevi, dentibus calycinis brevibus 
acutis, leguminibus sub 3-articulatis dense plumoso- 
setosis, sinu lato obtuso.—El Valle de las Lefias Amaril- 
las, Andes of Mendoza. Dr. Gillies.—' The vernacular 
name is * Lena Amarilla," or yellow wood, and seems to 
have given the name to the valley in the Andes in which 
it is found. Itapproaches in many points the A. horrida, 
and A. Uspallatensis, but the straight appearance of its 
branches is totally at variance with their scraggy dis- 
torted habit. The leaflets also are much longer than in 
either of the other two, measuring about half an inch. 
$. 4. Caules fruticosi, inermes. 
306. (22.) A. balsamica, Bertero.—Hook. et Arn. L e— 
Mimosa balsamica, Molina.— Valparaiso, Mr. Cruck- 
 Shanks; Bridges; Cuming (N. 190). West side of 
Cuesta de la Dormida (Chili). Dr. Gillies. 
307. (23.) A. viscosa (Gill. mst.); glanduloso-viscosa, fruti- 
cosa, foliis numerosis breve petiolatis, foliolis approxi- 
matis obovatis dentatis, racemo terminali elongato, brac- 
teis ovatis conspicuis, (floribus magnis), dentibus caly- 
cinis acuminatis, pedicellis demum  arcuato- deflexis, 
leguminibus 5-6-articulatis pubescentibus. atro-glandu- 
