318 PROCEEDINGS OF THE AMERICAN ACADEMY. 
simple, leafy to the summit, furrowed, springing from large tuberous- 
thickened and clustered roots: leaves 5-6 inches in length, glabrate 
above, white woolly beneath except upon the nerves, narrowly connate, 
deeply and palmately cleft into linear attenuate one-nerved spinulose- 
denticulate segments; the latter 2-3 lines in breadth, with revolute 
margins: peduncles and involucres densely fuscous-tomentose: heads 
corymbose, about 6, discoid, an inch in height: scales of the involucre 
lance-linear; the outer shorter: corollas yellow, 5-6 lines long; the 
tube hirsute: achene silky; pappus tawny, readily deciduous. — Col- 
lected on bluffs of barrancas, San Marcos, 9 June, 1893 (no. 4398). 
Near L. Palmeri, Gray, but differing in its arachnoid and not glandu- 
lar stem, leafy to the summit, its somewhat larger heads and more 
imbricated involucre, as well as in the more acute segments of the 
leaves, which in their mode of forking much resemble stag-horns. 
ASCLEPIAS JALISCANA. Stem simple or sub-simple, erect, setose 
hirsute, a foot in height: leaves sessile, oval to ovate-oblong, with 
rounded apex, sparingly hirsute upon both surfaces, ciliolate, glaucous 
beneath: flowers large, greenish, in several pedunculate, rather few- 
flowered umbels ; peduncles 8 lines to 1 inch long, little exceeding the 
pedicels; both hirsute: calyx segments lance-linear, half as long 38 
the corolla lobes; the latter reflexed, 5 lines in length, purplish upon 
the lower surface, green upon the upper: hoods 24-3 lines long, 
scarcely at all auriculate at the inner angles; horn broad and con- 
spicuously exserted: fruit tomentose, slender, fusiform. — Collected on 
the Rio Blanco, Jalisco, by Dr. Edward Palmer, in June, 1886 (20 
20); then by Mr. Pringle in plains near Guadalajara, June, 1889 (n0- 
3020), and again in dry soil, on plains and hills near the same city, 
July, 1893 (no. 4444). This species has the pubescence and much 
of the habit of .A. setosa, Benth., with which it has been hitherto com 
founded. It is to be distinguished by its broader and more obtuse 
leaves, more glaucous beneath, its sub-simple stem, and its somewhat 
larger flowers with scarcely auriculate hoods and broad horns. 
weg’s no. 213, Bentham’s type, as well as a number of other specimens 
_ correctly referred to his species, show that in it the horn is relatively 
_ slender and the hoods well auricled at the upper inner angles. 
Gonotosus sororrus, Gray (Proc. Amer. Acad. xxii. 437), 4 
scribed from fruiting specimens, is now shown in flower by Mr. 
Pringle’s no. 4435, collected on rocky bluffs above Tequila, 3 July, 
1893. The following characters may be added: flowers in numerous 
axillary short-peduncled or subsessile umbels ; pedicels 6-8 lines long + 
calyx segments lance-linear, obtusish, spreading or reflexed: corolla 
Hart-— 
