EUPHORBIACEAE 803 
en or glands of the involucre stalked : bracts and upper leaves m at all 
iscolore 1. P. den 
Glan p = the involuere sessile or nearly so: bracts and upper 
s discolored at the base 
p while or pale-pink at the base. 2. P. geniculata. 
tire b ur plant glabro involucral Sand: 
ostly 
rd 
P. pinetorum. 
Broad p dc with toothed blades. 4. P. heterophylia. 
5. P. cyathophora. 
1. P. dentata (Michx.) Small. Stem 2-4 dm. tall, pubescent: leaf-blades 1-9 
m. long, ovate, lanceolate, or d linear: involuere 2.5-3 mm. long; glands 
usually solitary: capsule 4—4.5 mm. broad: 
eed pred abe ulate. Rich ‘soil, dry 
hills, and plains, san provinces, rarely 
Coastal ee N. Fla. to N. M., Wyo., 8. D., 
N. Y 
2. P. geniculata (Ortega) iral Stem 
3-9 dm. tall, glabrous or ne cur s Po 
blades elliptic or ovate, 4-9 em. lon ie 
or obsoletely dentate: bracts often e 
. long: cap- 
sule 4—5 void, 3-3.5 
ad —Hillsi des and roadsides, Rio Grande 
Region, Tex, and Fla. Keys—(W. I., Mea x.) 
3. P. pinetorum Sm Stem 3-10 
tall, glabrous: Hos narrowly elonga ate- 
er 4—15 em. long: idi s involuere turbinate, mostly less than 3 
m. long: capsule p . long: seed 2-2.5 mm. long, slightly tuberculate. 
LP. havanensis (Fl. SE "8. Ny piscina and aay places, Everglade Keys, 
pen. Fla. and Florida eae —(W. I.) 
4, P. heterophylla (L.) Small. Perennial, stem 3-12 dm. tall: leaf- pue 
AINTE 
SPURGE. )—Ham oeks, wooded banks and "i places, Coastal Plain, Fla. 
to Tex., Kans., Minn. and Il.— (W. I., Mex., C. A., S. A.) 
5. P. cyathophora (Murr.) S Annual, stem 1. ü m. tall or less, pubes- 
cent: leaf-blades elliptie or dern pois to obovate o ovate, or narrower De e- 
cially on the branches, 5-18 em. long: involuc D eunus uio 3.5-4 mm. long: 
eapsule 4—4.5 mm. long: seed 3-3.5 mm. lo ong, tubereulate.— (PAINTED “LEAF. )— 
Hammocks, cult. grounds, waste-places, and roadsides, —(W. I. Mez., 
C. A., S. A) =k form, apparently of one or the other of the two preceding 
o dr. perhaps as an immigrant in the Central States up into Kans., 
Minn., and Il. 
29. EUPHORBIA L. Very succulent cactus-like shrubs or trees, with 
angled or ribbed spine-armed jointed stems and branches. Leaves small or 
