Asclepias. | ASCLEPIADE® (Brown). 665 
Umbels 4—8—flowered ; corona-lobes twice as iong as 
the entire staminal column ose we ..» (39) humilis. 
Umbels 8—15-—flowered ; corona-lobes a little longer 
than the stalk of the staminal column... ... (40) ulophylla. 
***Corona-lobes with a small transverse shelf-like flap 
within the cavity near the top; leaves linear or 
linear-lanceolate, 
Leaves 3-11 lin. broad, tapering into the petiole at 
the base ; umbels not exceeding or shorter than 
the leaves subtending them ty ne ... (18) navicularis. 
Leaves 14-4} lin. broad, truncate or subhastate at 
the base ; umbels much exceeding the leaves sub- 
tending them a pat otk ae ... (14) disparilis. 
****Corona-lobes without a keel, flap, horn or other 
process (but sometimes puberulous) within the 
cavity ; umbels all distinctly pedunculate. 
Leaves remarkably crisped-undulate, linear to lanceo- 
late, truncate, rounded or cuneate at the base, 
scabrous or pubescent By ber uae ... (42) erispa. 
Leaves not undulate nor crisped or but slightly so 
(see 837, A. meliodora, 46, A. Cooperi). 
{ Leaves 9-10 times as long as broad, linear- 
filiform, linear to lanceolate or linear-hastate : 
t Umbels 2 or more to a stem or branch, rarely 
solitary and then (except in 5, 4. premorsa) 
lateral, with the stem bearing one or more 
pairs of leaves beyond the base of the 
peduncle : 
§ Leaves tapering or rounded (never broadened, 
hastate nor truncate) at the base: 
|| Plant 3-15 in, high ; corolla-lobes 14-3} 
lin. long; 
Midrib on underside of dried leaves 
very stout, 2-3 lin. broad ; umbels 
a terminal pair or 3: : 
Upper internodes 4—} in, long; um- 
bels not exceeding the subtending 
lente hriestetireen to watts ve (2) orassinerns. 
Upper internodes 2-43 in.long; um- 
bels exceeding the subtending - 
leaves @disual) fie vieja ict’ (48) Weed. 
Midrib on underside of dried leaves 
4-4 (or rarely 4) lin. broad : 
Corona-lobes with the apical angles 
of their inflexed sides produced 
into slender subulate teeth 1 lin. 
long, rising high over the style- : : 
apex Sa 2 ee a(S) ieanpls. 
Corona-lobes with the angles at the 
apex or middle of their inflexed 
sides. not produced into long 
slender subulate teeth : 
Corona-lobes measured along their 
backs very much longer than 
the staminal column, but on 
account of their spread often 
not overtopping it: 
Leaves glabrous, linear-filiform 
or linear ; peduncles 13-5} in. 
long see ase see ee (21) aurea, 
