346 PITTONIA. 
Tampa, Florida, where he reports it as growing along the 
seashore. 
ARGEMONE GRACILENTA. Apparently several feet high, 
upright, slender, sparingly branched and sparsely leafy: 
stem rather strongly armed with straight spreading prickles ; 
leaves small, narrow, scarcely lobed but undulate, bearing 
several prominent marginal prickles, and a long and stout 
terminal one: sepals with the usual apical spine and several 
small and slender prickles upon the surface: petals white, 
1} inches long: pods small, ovoid, prickly. 
Muleje, Lower California, 1887, Edw. Palmer. Species of 
well-defined aspect, and indisputable characters. 
ARGEMONE BIPINNATIFIDA. Root perennial: somewhat 
clustered stems very stout, a foot high more or less, densely 
leafy, very hispid with somewhat unequal spreading prickles, 
and sparsely hirsute underneath the armature, both the 
prickles and the underlying pubescence extending to the 
lower face of the ample bipinnatifid leaves, these subsessile, 
spreading or somewhat recurved: sepals rather densely 
aculeate, but not pubescent, the prickles somewhat appressed : 
corolla 3 or 4 inches broad, the flowers several and subsessile 
in a cluster at the summit of the stem and its few short 
branches: pods barely an inch long, strongly armed with 
ascending prickles; valves 4 only. 
Common on gravelly knolis and bleak stony slopes of 
the hills of southern Wyoming. Root strictly perennial ; 
and the plant, from the altitude which it holds, must be con- 
sidered subalpine. 
CAKILE FUSIFORMIS. Glabrous annual, 2 feet high, the 
herbage not notably succulent, the thin leaves mostly 3 or 4 
inches long, tapering very gradually to tle petiole, the blade 
deeply pinnatifid, the segments few and remote, oblong-linear, 
obtuse: raceme a foot long or more in fruit, rather lax: 
silicles nearly an inch long, slenderly fusiform, the lower and 
