506 A NEW SPECIES OF SENEBIERA. 
willi. Near the base is a short leafy branch from which the 
cone is removed, f. 2. unusually formed leaf from among 
others, on a young branch; f. 3. male catkin ; f. 4. antheri- 
ferous scale from the same:—magnified;) f. 5. cone; f. 6. 
upper view of a scale removed from the cone; f. 7. side 
view of the same :—all but f. 4. nat. size. 
Figure and description of a new species of SENEBIERA from 
Patagonia, by W. J. H. 
(With a Plate.—Ta». XX.) 
SENEBIERA RHYTIDOCARPA, Hook. 
Gracilis procumbens ramosissima, foliis linearibus integris 
v. pinnatifidis, floribus minutissimis diandris? silicula orbi- 
culari compressa rugosa. (Tas, XX.) 
Has. Patagonia, Tweedie. 
Stems slender, procumbent, very much branched. Leaves 
scarcely an inch long, the largest of them, linear, glabrous, 
entire or pinnatifid, with few (about 3) linear segments, acute 
at the apices. Corymbs small, of few very minute flowers ; 
so minute, that in the dried state it is difficult to distinguish 
the structure. Calyx of 4 obtuse, concave sepals. Petals 
none, or not always present, for I think to have seen them - 
in some flowers, small and resembling minute scales. Stamens, 
in the flowers here examined, only two perfect, opposite ; 
there are besides four (in two opposite pairs, abortive fila- 
ments; lanceolate, each with a tooth near the base on one 
side. The perfect stamens have the filaments singularly en- 
larged at their base with a depression on each side. The 
fruit is racemose, each raceme with 3-6 silicula. This is 
nearly orbicular, compressed at tlie sides, and singularly 
wrinkled or marked with pits, Valves hemispherical, keeled 
at the back, but not winged. Seed one in each cell, Embryo 
with the cotyledons curved upon the radicle, the apices again 
a little curved. 
