60 MISSOURI BOTANICAL GARDEN. 
oblanceolate, one half to two thirds as long as the sia 
sule. —On sandy soils. — Plate 24. 
Specimens examined from Kansas (Hitchcock, no. 991, in sandy soil, 
Harper Co.); Indian Territory (Palmer, nos. 307, 308, ‘‘ Between Ft. 
Cobb and Ft. Arbuckle; Sheldon, no. 301; Butler, no. 6 (?), 1877); Okla- 
homa (Oliver, no. 117); Texas (Berlandier, nos. 649, 2059; Lindheimer, 
no. 526; Reverchon=Curtiss, no. 2525a, no. 871; Buckley, 1875; 
Wright, “‘ dist. 575,’’ 1849; Ness, 1893; Palmer, no. 1241; Croft, no. 
25; Havard; Nealley, no. 225 = 457, no. 459457; Ferguson, 1899); 
Mexico (Wilkinson, 1885). 
C. MONANTHOGYNUS Michx. Fl. Bor. Am. 2: 215. 1808; 
Geiseler, Crot. Monog. 68. 1807; Adr. Jussieu, Tent. 
Euphorb. 30. 1824; A. Gray, Man. Bot. 392. 1857; 
Chapman, Fl. South. U. S. 408. 1860; Young, FI. 
Texas 485. 1873; Wood, Class Book Bot. 631. 1881; 
Coulter, Bot. West. Texas 400. 1894; Small, in Brit- 
ton and Brown, Ill. Fl. U.S. and Can. 2: 363. f. 
2292. 1897. C. tomentosus Schecut, Fl. Carol. 471. 
1806. (C. ellipticus Nuttall, Gen. N. A. 2: 225. 
1818; Wood, Class Book Bot. 489. 1847; Darby, Bot. 
South. U.S. 499. 1855. Argothamnia herbacea Spren- 
gel, Syst. Veg. 3: 848. 1826. Hngelmannia Nuttal- 
liana Klotzsch, in Wiegmann, Archiv fiir Natur- 
geschichte 7: 253. 1841. Gynamblosis monanthogyna 
Torrey, in Marcy, Expl. Red River 282. 1854; U.S. 
and Mex. Bound. Surv. 196. 1859. Angelandra ellip- 
tica Baillon, Etude Gen. Euphorb. 379. 1858. Oxy- 
dectes monanthogyna Kuntze, Rev. Gen. Pl. 612. 
1891. 
Low annual, 3 to 5 dm. high, repeatedly 2- to 4-choto- 
mous, whitish or sometimes rusty-stellate throughout, at 
length papillate; lower leaves long petioled, orbicular; 
upper leaves ovate to oblong-ovate, entire, generally obtuse 
and mucronate, 1 to 4 (to 6) cm. long, cinereous below; 
petioles about one half the length of the leaves; racemes 
very short, about 1 cm. long; staminate flowers on bracte- 
ate pedicels 2 mm. long; calyx of 3 to 5 ovate sepals; 
