186 EUPHORBIACEAE 
I. CORCHORIFOLIAE 
Plant annual. 
Braets subtending the pistillate flowers with 5-7 
ra rely 9, eee elliptic to lanceolate, Suis or PUDE 
lobes: leav the main stem with ovate or rhombic- 
ovd aac A 1. A. rhomboidea. 
Bracts poe ee the pistillate flowers with 9-15 short 
: obes or teeth: leaves of the main stem with mostly 
ete aceon to linear blades. 
Bracts of the pistillate flowers with lanceolate acute 
lobes: blades of the cauline leaves oe to nar- 
rowly jaucesiate tapering to a blunt tip. . A. virginica. 
Bracts of the pistillate flowers with ieee ate to deltoid 
lobes: blades of the cauline leaves EI Ene 
o linear, obtusish ; petioles a fourt tenth a 
long as the bl 2d 3. A. gracilens. 
pen perennial, prostrate: stems wire-like: seeds barely 1 
. long. 4. A. chamaedrifolia. 
II. OSTRYAEFOLIAE 
Mature pistillate D slender, interrupted, not plumose; 
bracts us a olate or a scabrous lobes: cap- 
sale depre 
Bracts with T lobes about as long as the body: 
a. about 3.5 mm. wide, echinate-tuberculate: seed 
tuberc 9. A. ostryaefolia. 
T with slender- un ns lobes much longer than the 
ES capsule about 2.5 mm. wide, sparingly pubescent : 
eed obs Scurely pitte 6. A. setosa. 
Mature. pistillate spikes stou t, continuous, plumose; bracts 
Me slender-caudate long-ciliate lobes: capsule globose- 
oid. T. A. alopecuroidea. 
1. A. rhomboidea Raf. Stem 1—7 dm. tall: blades of the cauline leaves ovate to 
rhombic-ovate, 2-10 em. long, glabrous ex- 
cept for a ' few quand seattered hairs 
n diamet 
Woods and | thic ckets, various provinces, Ph. 
, Minn,, and Me.—Plan re- 
puted ye have medicinal properties. 
2. A. virginica L. Stem 2-5 dm. tall, 
m. 
ine: — Woods per stream- banks, various provinees, Ga. to Tex., Mo., and Mass. 
3. A. gracilens A. LM C em 1-8 dm. tall, puberulent to pubescent with i 
rved or ascending hairs: blades of the cauline leaves elliptic-lanceolate 7 
i in A. gracilen j 
eapsule about 2 mm. in diam eeds 1.5-2 long.—Dry woods, hill- 
sides, sandy banks, and old fields, cn provinees, "Fla. to Tex., Mo.. Wise., and 
Mass. 
ÀA. E A (Lam.) Muell Arg. Stem and branches mostly pro 
trate, 5—30. cm. long: blades of the upper leaves ovate to elliptic A 
7-20 mm Em erenate-serrate: larger braets 4-6 mm. long, toothed: eapsule 
