792 EUPHORBIACEAE 
sepals and numerous stamens, mainly yellow, 
Pistillate flower with caducous sepals and a 
3-celled ovary, green. Fruit a capsule.— 
One species. 
1. R. communis L. Small tree or pn 
1-5 m. tall, the stem widely bran ehed, or 
annual h rb n orthward: leaf-blades i 
ule 12- i 
E U. 
cult, ( Widely dist )—Su um.—fall or all d 
e seeds yield the castor oil of c 
24. CHAMAESYCE S. F. Gray. Annual or perennial herbs or shrubs. 
Leaves opposite: blades oblique at the base. Involucres axillary or in axillary 
cymes, each with 4 naked or appendaged glands, one sinus bein ing glandless. 
Capsule smooth, sometimes pubescent. Seed smooth or Mam d -wrinkled.— 
About 225 species, widely distributed.—SPURGES.  EUPHORBI S.—The flower- 
like involueres have appendages to the marginal glands, either green tinged 
with red, red, greenish-white or white. Some of the species have reputed 
medicinal properties. 
Leaf-blades entir 
lant with prostrate stems and branches, 
Leaves succulent: seed not angled, sometimes terete or nearly so. 
I, POLYGONIFOLIAE, 
n herbaceous or chartaceous: seed sharply 
II. CORDIFOLIAE. 
Plant ith erect or ascendi ing stems and branches. III. BUXIFOLIAE. 
Hd ERU Sometimes only at the apex. 
e glabr 
Pla nt with prostrate stems and branches II. CORDIFOLIAE. 
Plant wit ect or ascending stems ind branches. IV. HYSSOPIFOLIAE. 
Capsule pubes Con E 
Involucres axillary to the leaves or leaf-like bracts. 
or branches, erect. V. TRACYANAE. 
tem, or branches, prostrate. VI. MACULATAE. 
Involucres in peduncled clusters. VII HIRTAE. 
. POLYGONIFOLIAE 
Seed 1.5 mm. more, somewhat 3-side 
d. 
Xie EE 3. sided, covered with a silvery-gray bloom, 
ually 1. C. polygonifolia. 
Seed . equ ually 3- sided: povened with a whitish or speckled 
loom, Ca abou t 1.5 mm. long. 2. C. Ingallsii. 
Seed less than 1.5 mm. long, nearly terete. 3. C. cumulicola. 
II. ConDiFOLIAE 
Capsule, and ovary, glabro 
Leaf- oe at ee those of the stem or main branches, 
us ed Po r than wide, mainly elliptic to nar- 
Ínvotüere. "ao ut 1. 5 mm. long, broadly campanulate: 
leaf-blades thick zn parchment-like. 4. C. Chiogenes. 
Mone about 1 sone: narrowly campanulate: 
eaf-blades thin- BEES 5. C. Blodgettii. 
Leaf blades eee ovate to. orbic 
endag f the involucre- Mare minute or obsolete, 6. C. serpens. 
ABUSE. of the involucre-glands petal-like. 
