398 PROCEEDINGS OF THE AMERICAN ACADEMY 



PoLYGALA Americana, Mill. Two feet high or less ; outer petals 

 purple, the inner cream-color. Barranca, in exposed places. (417.) 



Poltgala leptocaulis, Torr. & Gray, Very like P. gracilis, 

 the seed slightly larger, more pubescent, and with a minute un- 

 appendaged aril. Guadalajara, among grass in a swampy bottom ; 

 September. (447.) 



PoLYGALA Berlandtert, Watson. Guadalajara, in sandy bot- 

 toms ; September. (470.) 



PoLYGALA GLOCHiDATA, HBK. Flowers lilac. Rio Blanco, 

 among grass in the shade of rocks; September. (546.) 



PoLYGALA LONGiCAULis, HBK., var. (?) with less laciniate crests, 

 each half of the double crest consisting of two unequal segments, the 

 anterior oblong-ovate, the posterior narrow and acuminate ; otherwise 

 the specimens differ little from the Brazilian species. Rio Blanco, on 

 exposed hills, among grass; September. (553.) — The hairs upon 

 the seeds of this and the allied species are erect, instead of retrorse 

 as described, becoming divergent when wet, especially those near 

 the summit. 



PoLYGALA conferta, Bennett. Rio Blanco, in low places ; 

 September. (571.) — The specimens seem to accord with the descrip- 

 tion of this species. They are also the same as 3249 Bourgeau, in 

 herb. Gray, which is referred by Mr. Bennett to P. cruciatn. 



PoLYGALA GRACiLLiMA. Annual, Very slender, glabrous, the 

 stems (3 to 5 inches high) simple or branched above : leaves scattered, 

 very small, the basal petiolate, ovate or oblong-ovate, a line long, the 

 upper linear, acute, glandular-punctate, 1 to 1^ lines long : flowers 

 very small, white, nearly sessile in dense slender spikes half an inch 

 long or less ; bracts lanceolate, acuminate, glanduliferous : outer sepals 

 minute ; wings unguicuUte, oblong-ovate, exceeding the keel ; crests 

 comparatively broad, entire : capsule broadly elliptical, substipitate : 

 seeds oblong (immature). Rio Blanco, among grass ; October. (756.) 



PoLYGALA ? Flowering specimens of an herbaceous per- 

 ennial allied to P. Americana, erect, \h feet high, simple or branched 

 above, pubescent throughout with spreading hairs : leaves linear-lan- 

 ceolate, very acute, cuneate at base, prominently nerved and veined 

 beneath, ciliate, very shortly petiolate, 6 to 15 lines long: flowers in 

 a loose elongated raceme, on slender pedicels (2 lines long), creamy 

 white, 2^ to 3 lines long : ovary orbicular, densely pubescent. Rio 

 Blanco, under bushes ; September. (735.) 



Arenaria alsinoides, Willd., a rough form. Rio Blanco, in 

 shaded spots, among rocks ; June. (42.) 



