EUPHORBIACEAE 709 
3. Chamaesyce Geyeri (Engelm.) Small. Annual, olive-green, glabrous. Stems 
branched at the base, the branches radially spreading, prostrate, 0.5-4 dm. long, forking, 
wiry: leaf-blades oblong to ovate, 4-12 mm. long, obtuse, usually mucronulate, entire, 
mostly truncate or subcordate at the base, short-petioled: involucres turbinate, 1.5 mm. 
high, usually longer than the peduncles: glands about 0.3 mm. broad ; appendages incon- 
spicuous, white or red: capsules globose-reniform, about 2 mm. high: seeds narrowly 
ovoid, 1.5 mm. long, nearly terete, ash-colored. [Euphorbia Geyeri Engelm. ] 
On plains or prairies, Minnesota to Illinois, Kansas and the Indian Territory. Summer and fall. 
4. Chamaesyce ammannioides (H.B.K.) Small. Annual, glabrous. Stems branched 
at the base, the branches prostrate, very slender, 3-9 dm. long, the ultimate divisions 
nearly filiform: leaf-blades oblong, 4-6 mm. long, obtuse or abruptly pointed, entire, 
oblique at the base, Menit neiclod : involucres campanulate, barely 1 mm. high, shorter 
than the peduncles: glands transversely oblong, 0.5 mm. broad ; appendages whitish, rep- 
resented by mere borders : capsules depressed, about 2-2.5 mm. broad, smooth : seeds ovoid, 
1 mm. long, smooth. [Euphorbia ammannioides H.B.K.] 
In sand, southern peninsular Florida. Spring to winter. 
5. Chamaesyce Náshii Small. Annual or biennial, glabrous, rather fleshy. Stems 
branched at the base, the branches prostrate, 2-5 dm. long, forking, relatively stout : leaves 
sometimes numerous on the branches ; blades broadly oblong, varying to slightly broadest 
above or below the middle, 3-8 mm. long, inclined to be truncate or retuse at the apex, 
entire, obtuse or truncate at the oblique base: involucres turbinate-campanulate, nearl 
1.5 mm. high, glabrous, longer than the peduncle : glands nearly 0.3 mm. broad ; append 
ages narrow, delicate, entire or undulate: capsules fully 1.5 mm. high, glabrous: seeds 
oblong-ovoid, about 1 mm. long, the faces with shallow transverse wrinkles. 
On sandy beaches, peninsular Florida and the Keys. Spring to winter. 
6. Chamaesyce Chiógenes Small. Annualor biennial, deep green, glabrous. Stems 
branched at the base, the branches prostrate, wiry, 1-3 dm. long, forking, with rather 
long internodes: leaves rather few ; blades often becoming parchment-like, oval, ovate or 
oblong, 3-8 mm. long, acute or obtuse, and entire, or broadly oval or suborbicular and 
toothed, inequilateral, manifestly petioled : involucres turbinate-campanulate, about 1 mm. 
high, short-peduncled : glands minute; appendages mere white or pale borders: capsules 
fully 1 mm. high, glabrous, theangles rather sharp : seeds about 1 mm. long, 4-angled, the 
faces uneven. 
Insand, Florida Keys. Throughout the year. 
7. Chamaesyce sérpens (H.B.K.) Small. Annual, pale green, glabrous, sometimes 
glaucescent. Stems branched at the base, the branches slender or filiform, prostrate, 5-30 
em. long : leaf-blades orbicular, orbicular-ovate or oval, 2-6 mm. long, obtuse or emarginate, 
entire, often slightly revolute-margined, short-petioled, the base oblique, rounded or sub- 
cordate ; stipules triangular, somewhat toothed at the apex : peduncles slightly longer than 
the petioles: involucres solitary in the axils, nearly 1 mm. high : glands 4, sessile, saucer- 
shaped, shorter than the involucre-lobes ; appendages minute, irregular, crenulate : capsules 
nodding, depressed-globose, 2 mm. broad: seeds oblong-ovoid, 1 mm. long, smooth, ob- 
tusely 4-angled, light gray. [Euphorbia serpens H.B:K. ] 
On prairies, Iowa to Illinois, Kansas and Mexico. Spring to fall. 
8. Chamaesyce cordifdlia (Ell.) Small. -Annual, glabrous. Stems branched at the 
, the branches spreading or prostrate, 1-5 dm. long, forking, often diffuse : leaf-blades 
broadly oblong to oval or sometimes slightly broadest below the middle, obtuse, entire, 
manifestly petioled : involucres campanulate, 1 mm. high, shorter than the peduncles : 
lands transversel oblong ; appendages white, orbicular or ovate, 0.8 mm. long: capsules 
roader than high, 1.5 mm. high, the angles sharp: seeds ovoid, 1 mm. long, smooth, 
obscurely 4-angled. [Euphorbia cordifolia Ell. ] 
In sand, South Carolina to Florida and Texas. Summer and fall. 
9. Chamaesyce brachypoda Small Annual, hirsute or villous-hirsute. Stems 
often branched at the base, the branches s reading, prostrate, 1-3 dm. long, forking, barely 
Py the branchlets 1-2 cm. long, with many joints: leaf-blades oblong to ovate, 2-7 
mm. ong, obtuse, hirsute, entire, thick, very oblique, short-petioled : involucres fully 1 
“a high, campanulate, hirsute, longer than the peduncles: glands red, about 0.5 mm. 
road ; appendages very narrow, entire or obsolete: capsules fully 1 mm. long, globose- 
ovoid, copiously pubescent, acute-angled : seeds less than 1 mm. long, nearly smooth. 
In sand, southern peninsular Florida. Spring to fall. 
10. Chamaesyce Laredàna ( Millsp.) Small. Annual, viscid-villous with white hairs. 
Stems branched at the base, the branches numerous, 0.5-3 dm. long: leaf-blades ovate 
oroval-ovate, 2-5 mm. long, obtuse, entire, lanate, cordate at base : involucres campanulate, 
