CROTONS OF THE UNITED STATES. 69 
368, 1480; Wilcox, 1888; Holmes, 1889; Clements, no. 2820; Webber, 1889; 
Swezey, no. 124; Lanhofer, 1887; Pammel, 1895; H. Engelmann, 1856 
and 1858; Mersch, 1843); Wyoming (Nelson, no. 428, Fairbanks; Knowl- 
ton, no. 127); Utah (Bishop, 1872, resembles C. virens); Colorado (B, 
Smith, 1869; Redfield, no. 561; Cowen, 1892; Trelease; Tracy and Evans; 
Knowlton, no. 95; Jones, no. 586; Patterson, 1875; Parry, no. 325; Hall, 
“cult”?; Vasey, 1868); Kansas (Sheldon, no. 324; Thompson, nos. 50, 187; 
Carleton, no. 260; Smythe, no. 121; Bodin, 1888; Redfield, 1872; Reed, 
1892; Gurney, 1891; Norton, Dept. Bot. K. A. C.,no. 484; Shear, no. 207; 
McKenzie, 1895); Indian Territory (Bush, no. 554; Palmer, no. 306; 
Sheldon, no. 272); Oklahoma (Waugh, 1893); New Mexico (Vasey, 1881; 
Crandall, no. 419; Heller, no. 3813; Rothrock, no. 37; Fendler, nos. 780, 
781; Wislizenus, 1846; Jones, no. 4145; Mulford, nos. 1225, 1278, 1809) ; 
Arizona (Coues and Palmer, no. 534; Lemmon, nos. 52, 54; Santa Cata- 
lina Mts., 1881; no. 55, Chiricahua Mts., 1881; Hoyt, 1892; Mearns, 1884; 
Lemmon, nos. 284, 577; Pringle, 1881; Hough, no. 38; Parish, no. 240, 
Lowell; Swart, no. 14; McDougal, no. 536, Verde Valley; Tracy, 1887). 
Most of the forms in Arizona have very broad leaves, and rather low 
simple stems. 
To the above belong the following of uncertain locations: D. Andrews, 
California [?]; Stansbury’s Exped., July 20, 1850; James, Sources of the 
Canadian, 1835; Abert, Arkansas river; Emory, Sept. 26, 1846; Bigelow, 
Pecan Creek, Ft. Smith to Rio Grande, 1853-4; Vasey, no. 524, Rocky 
Mts. Lat. 40°-41°; Powell’s Exped., 1868; Newberry, in McCombe’s 
Exped., 1859; Marcy’s Exped. to Red River, 1852; Fremont’s First 
Exped., 1842; Fremont’s Third Exped., nos. 146, 176, in 1845. 
C. virens Muell Arg. Linnaea 34:142. 1865. (Printed 
virens); DC. Prod. 157: 690. 1866. Oxydectes virens 
Kuntze, Rev. Gen. Plant. 613. 1891. 
Annual, very slender, mostly alternately and laterally 
branched, dichotomous above; branchlets and inflorescence 
whitish; leaves oblong to lanceolate, obtuse at the ends, 
2 to 5 cm. long, 7 to 15 mm. broad, entire; not pap- 
illate, glabrous, save for a few silvery stellates, not scales ; 
the pluriserially radiating hairs depressed and _persist- 
ent (somewhat deciduous in the closely related C’. Texen- 
sis); staminate racemes short, 1 to 3 cm. long, rarely 
longer, simple or branched, nude below; pedicels slen- 
der, 5 to 7 mm. long; sepals small, thin, ovate; no 
petals; glands small; stamens 10 to 12; filaments 
subglabrate, exserted one third; pistillate racemes 
