404 Field Museum of Natural History — Botany, Vol. II 



mm., long-crisp-hairy on both surfaces; petioles short, thick; stipules 

 elongate-linear, hairy. Involucres elongate-turbinate narrowing to 

 the peduncle which is about the length of the tube; both surfaces pilose; 

 sulcus U-shaped with a short, linear lobe in the fundus; glands trans- 

 verse, ovoid, short stipitate, scutelliform; appendages fiabelliform, 

 twice the width of the glands, entire, the margin papilliform-ciliate; 

 male flowers few; pedicels glabrous; filaments very short; female flower 

 pedicellate; ovary densely pilose; styles bifurcate to the middle, the 

 stigmatic lobes divergent. Capsule obpyriform, pilose, strongly tri- 

 coccous; seeds red-ashen, elongated ovoid-quadrangular, pointed, 1.2 x 

 .5mm., angles sharp; facets nearly smooth, indistinctly marked by a 

 median longitudinal line approached on both sides by numerous, ir- 

 regular, faint, transverse ridges. 



Near Ch. velleriflora (Boiss). 



Known only from the vicinity of Victoria, Tamaulipas, Mexico, 

 where it was collected by Dr. Edward Palmer, Feb. i— Apr. 9, 1907 as 

 his no. 98 (Type in herb. Field Museum cat. no. 217,435), 



Chamaesyce Standleyi sp. nov. 



Annual, prostrate, finely pilose. Stems many, from a thickened root- 

 stalk; branches densely pilose, short, each subtended by a pair of large 

 leaves; branchlets very short. Inflorescence solitary in the axils of the 

 branchlet leaves. Leaves strongly inaequilateral, ovate, 3 x 4—5 x 10 

 mm., nearly glabrous, cordate, blunt, lightly crenate-dentate more pro- 

 nounced at the rounded apex; petioles short (.8mm.); stipules linear 

 entire. Involucres cylindro-turbinate on a very short peduncle with 

 bract-like leaflets at the base, densely pilose without and within; 

 lobes triangular, long-ciliate; sulcus narrow, about half the depth of the 

 involucral tube, fundus unoccupied; glands transverse, narrowly scutelli- 

 form and somewhat plicate; appendages white, rounded, entire, very 

 narrow on the lower and somewhat broader on the upper pair of glands; 

 male flowers few, very short pedicelled and inserted in a ring at the 

 base of the tube, not as long as the pedicel of the female flower; glabrous; 

 female flower short pedicelled; ovary obpyriform, pilose; styles long, 

 bifurcate at the apex. Capsule pilose, deeply tricoccous; seeds ashen, 

 ovoid-quadrangular, blunt, .9 x. 4mm., the angles sharp and somewhat 

 included by the ridges; facets marked by 3-4 often incomplete transverse 

 ridges. 



Near Ch. thymifoHa (Burm.). 



Only known from the vicinity of Acaponeta, Tepic, Mexico, where it 

 was collected by Rose, Standley b' Rose, Apr. 10, 1910, no. 14342 (Type in 

 U. S. National Herbarium cat. no. 637,211). 



