712 EUPHORBIACEAE 
1.5 mm. high, about as long as the peduncles, glabrous: glands fully 0.5 mm. broad ; ap- 
pendages colored, undulate: capsules 1.5-2 mm. in diameter. 
In sand, southern peninsular Florida. Spring to fall. 
25. Chamaesyce villifera (Scheele) Small. Annual, villous. Stems erect or as- 
cending, 0.5-3 dm. tall, forking, slightly zigzag: leaf-blades ovate or triangular-ovate, 3-6 
cm. long, obtuse or acutish, entire, truncate or subcordate at the oblique base, short-petioled : 
involucres campanulate, 1 mm. long, longer than the peduncles: glands minute ; append- 
ages white or rose-colored, oval or cuneate, 3-4 times longer than the width of the glands.: 
capsules 3-lobed, 2 mm. broad, 1.5 mm. high, the angles rather acute : seeds ovoid, less than 
1 mm. long, transversely wrinkled. [Euphorbia vilhfera Scheele. ] 
In dry soil, Texas. Spring to fall. 
26. Chamaesyce Stanfiéldii Small. Annual, sparingly villous or glabrate. Stems 
forking above, sometimes branched at the base, slender and wiry, slightly zigzag : leaf- 
blades triangular or ovate-triangular, 5-8 mm. long, serrate, sometimes slightly auricled 
on one side of the very oblique usually truncate base, short-petioled : involucres campanu- 
late, about 1 mm. high, usually longer than the peduncles, glabrous, ribbed : glands 0.2-0.3 
mm. broad ; appendages minute, white, petal-like, longer than broad : capsules about 1.5 
mm. high, sharp-angled, glabrous : seeds ovoid, about 1 mm. long, with few shallow trans- 
verse wrinkles. 
In dry soil, southern Texas. Summer and fall. 
27. Chamaesyce Blodgéttii (Engelm.) Small. Annual or biennial, glabrous or 
nearly so. Stems branched at the base, the branches few or numerous, 1-4 dm. long, fork- 
ing, prostrate : leaves numerous ; blades oblong or nearly so, 3-8 mm. long, minutely serrate 
near the apex, oblique at the base, manifestly petioled : involucres campanulate, less than 
1 mm. high, short-peduncled: glands minute, elevated ; appendages irregular, white or 
slightly colored : capsules 1.5 mm. high, about as broad, glabrous, the angles rather sharp : 
seeds about 1 mm. long, gray, 4-angled, the faces faintly transversely wrinkled. [Euphorbia 
Blodgettii Engelm. ] 
In sand, Florida Keys. Spring to winter. 
28. Chamaesyce serpyllifòlia (Pers.) Small. Annual, dark green, or becoming 
reddish, glabrous. Stems branched from the base, the branches slender, prostrate or 
ascending, 1-4 dm. long : leaf-blades oblong to spatulate, 3-12 mm. long, obtuse or retuse, 
nearly entire, or serrulate to below the middle, short-petioled, the base oblique, mostly 
truncate or obtuse: stipules at length a fringe of weak bristles: involucres solitary 1n 
the axils, sometimes clustured toward the ends of the branchlets, over 1 mm. long: glands 
4, disk-like; appendages narrow, lobed: capsules 2 mm. broad, slightly a : seeds 
ovoid, hardly 1 mm. long, 4-angled, the faces transversely wrinkled and pitted. Euphor- 
bia serpyllifolia Pers. ] 
In dry soil, Wisconsin to California and Mexico. Spring to fall. lab 
29. Chamaesyce glyptospérma (Engelm.) Small. Annual, pale green, glabrous. 
Stems branched near he bm the Tanie ascending, spreading or prostrate, 4-40 cm. 
long: leaves numerous ; blades oblong, linear-oblong or rarely ovate, 2-12 mm. long, 
more or less falcate, obtuse at the apex, inequilateral, serrulate, very oblique and obtuse or 
subcordate at the base, short-petioled ; stipules becoming fringed : involucres solitary In 
the axils, or often clustered, campanulate, fully 1 mm. long, with 4 dark ribs : glands 4, 
saucer-shaped ; appendages narrow, crenulate, or slightly lobed: capsules depressed- 
globose, less than 2 mm. in diameter, nodding : seeds oblong, 1 mm. long, ash-colored, 
strongly transversely wrinkled, not pitted. [Euphorbia glyptosperma Engelm. ] 
In sandy soil, Ontario to British Columbia, Texas and Mexico. Spring to fall. 
30. Chamaesyce nütans (Lag.) Small. Annual, glabrous or sparingly pulses. 
Stems branched, at least above, ascending or erect, 1.5-6 dm. high, the branches most 
spreading, and 2-ranked, often recurved at the ends, the flowering branches slender : l s 
blades oblong or linear-oblong, varying to ovate or obovate, often falcate, oblique, 
3-nerved, unequally serrate, often with a red blotch and red margins, short-petiojec ; 
stipules slightly lacerate: involucres narrowly obovoid, 1 mm. long, one-half or one thir 
as long as the peduncles: glands 4 ; appendages orbicular or reniform, entire, white or : 
capsules glabrous, fully 2 mm. in diameter: seeds oblong-ovoid, 1.5 mm. long, 4-angie¢, 
brown or nearly black under a grayish coat, transverse-ridged. [Euphorbia nutans Lag.] 
In fields and thickets, throughout eastern North America, except the extreme north, extending 
west to the Roeky Mountains. Spring to fall. ` 
31. Chamaesyce Brasiliénsis ( Lam.) Small. Similar to C. nutans in habit. — 
sometimes woody at the base, the flowering branches filiform: leaf-blades more c y 
toothed : capsules usually less than 2 mm. in diameter : seeds commonly about 1 mm. ‘ong, 
black or nearly so. [Euphorbia Brasiliensis Lam. ] 
In waste places and dry soil, Gulf States to Mexico and tropical America. Spring to winter. 
