144 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
ADDITIONAL SPECIMENS EXAMINED: Bishops Cap, March 30, 1905, Wooton; 
Organ Mountains, September 23, 1906, Wooton & Standley; Carrizalillo Moun- 
tains, April 20, 1892, Mearns 118; 3 miles south of Hillsboro, alt. 1,650 meters, 
June 6, 1904, Metcalfe 1298; Mangas Springs, alt. 1,380 meters, 1903, Metcalfe 
784. 
Other specimens have been seen from western Texas and southern Arizona. 
Doctor Gray, in the second part of Plantae Wrightianae, mentions this as 
“Rutosma teranum, var. corolla purpurea.” His specimens came from “ hills 
near El Paso.” Rutosma teranum, the other species of the Southwest, occurs 
in southwestern Texas and adjoining Mexico. It has yellow petals much larger 
than those of R. purpureum, and the carpels are erect instead of spreading. 
POLYGALACEAE. 
Polygala neomexicana Wooton & Standley, sp. nov. 
Stems slender, erect or ascending, 20 to 35 em. high, flexuous, simple or 
branched above, cinereous-puberulent; leaves numerous, thin, bright green, 
nearly sessile, sparingly puberulent or glabrate, lanceolate or elliptic, 15 to 30 
mm. long, acute; inflorescence of few-flowered racemes; flowers soon pendulous, 
6 mm. long, on pedicels 2 mm. long; perianth early deciduous: wings obovate, 
ciliolate, the keel naked; mature fruit oval or broadly oblong, about 10 mm. 
long, emarginate, the sinus closed, the faces puberulent, the margins ciliate, the 
seeds narrowly obovoid, hairy, the caruncle lobes forming processes one-third to 
one-half the length of the seed. 
Type in the U. S. National Herbarium, no. 497803, collected on Miller Hill, 
Grant County, September 8, 1897, by O. B. Metcalfe. 
ADDITIONAL SPECIMENS EXAMINED: Guadalupe Canyon, August 16, 1892, Mearns 
692; San Luis Mountains, September 5, 1893, Mearns 2139. 
We have also seen specimens from southeastern Arizona. 
While closely related to P. puberula, our plant differs decidedly in its taller, 
more slender stems, larger, broader, thinner, nearly glabrous leaves, larger 
flowers, larger, puberulent fruit, and different seeds. The flowers appear to be 
yellow or white, but possibly they have faded in the herbarium. 
EUPHORBIACEAE. 
Chamaesyce chaetocalyx (Boiss.) Wooton & Standley. 
Euphorbia fendleri chaetocalyx Boiss. in DC. Prodr. 15*: 39, 1862. 
In his original description Boissier says: “Ab E. Fendleri habitu diversa 
videtur, sed auctoritate cl. Engelm. qui formas intermedias observasse monuit 
cum ea junxi.” Continued observation in the field compels us to regard this 
as a distinct species. It differs decidedly from C. fendleri in its erect rather 
than prostrate stems, its narrow, acute leaves, its elongated internodes, and its 
narrow appendages. 
Chamaesyce micromera (Boiss.) Wooton & Standley. 
Huphorbia micromera Boiss. in DC. Prodr. 157: 44. 1862, 
Chamaesyce serrula (Engeim.) Wooton & Standley. 
Euphorbia serrula Engelm. in Torr. U. 8. & Mex. Bound. Bot. 188. 1859. 
Croton eremophilus Wooton & Standley, sp. nov. 
Perennial, suffrutescent at the base, 35 em. high or less; stems slender, erect, 
densely stellate, corymbosely branched above; petioles 25 to 30 mm. long, 
slender; lower leaf blades oblong or oval, obtuse, 35 to 45 mm. long, grayish 
beneath with dense, stellate pubescence, green above and with a fine, rather 
