OF AUTS AND SCIENCES. 325 



(6G) ; 42 Parry & Palmer. 42i Parry & Palmer is the more fertile 

 form with nearly apetalous flowers. 



PoLYGALA Palmeri. Perennial, branching, 6 to 8 inches high, 

 densely short-pubescent throughout : leaves scattered, oblong-oblauceo- 

 late, truncate and mucronate or abruptly acute, attenuate at base, 

 mostly 6 to 9 lines long by 2 or 3 broad: racemes open and few- 

 flowered : flowers pale greenish-yellow, 3 lines long, soon reflexed ; 

 sepals linear-lanceolate ; wings jjubescent and ciliate, ovate, acute, 

 cuneate at base, about equalling the crestless keel; petals oblong, 

 purplish : capsule flat, ovate, deeply emarginate, pubescent, 4 lines 

 long. — At Juraz, Coahuila. Nearly allied to P. Americana and 

 P. ptiberula, and much resembling forms of the latter species, but 

 more pubescent, and with larger flowers and fruit. 



PoLYGALA OBSCURA, Benth. At Monterey, Nuevo Leon, spar- 

 ingly collected ; 41 and 44 Parry & Palmer. 



PoLYGALA Greggii. Perennial (?), pubescent throughout, the 

 stems very slender and terete, flexuous above and branching, about a 

 foot high : leaves punctate, from oblong-spatulate to cuneate-obovate, 

 obtuse or emarginate, 3 to 5 lines long : flowers few, 2 or 3 axillary 

 near the end of a short leafy branchlet, white, 3 lines long; sepals 

 narrowly lanceolate ; wings slightly pubescent, cuneate-obovate, ex- 

 ceeding the narrowly oblong petals, which are longer than the keel 

 and adnate to it half its length ; keel without crest, the very broad 

 and rounded lateral ' margins folded back and covering the hood : 

 ovary pubescent, flattened, elliptical, emarginate. — West of Cerralbo 

 (Gregg). A strongly marked species of this group, remarkable for 

 the long petals and the broad reflexed margins of the keel. 



PoLYGALA MACRADENIA, Gray. At Juraz, Coahuila (70) . 



PoLYGALA ALBA, Nutt. In the Sierra Madre, Coahuila (G8) ; 

 39 Parry & Palmer. The lower leaves are often distinctly verticillate. 



PoLYGALA SCOPARIA, HBK. At Lerios, Coahuila (69). This 

 is very probably also P. Mexicana, DC, but the drawing by Mo(;ino 

 & .Sesse is too poor for positive identification. 45 Parry & Palmer, 

 which is referred here, has very short round-quadrate capsules, but 

 still exceeding the petals. 



PoLYGALA viRiDis. Minutely pubescent ; stems several, erect or 

 ascending from a biennial (?) root, 3 or 4 inches high : leaves scat- 

 tered, oblanceolate, acute, attenuate at base, 3 to 5 lines long by 

 H or 2 broad: racemes terminal or often lateral, open, ^ to at 

 length 2 inches long : flowers very small, nearly sessile ; wings spatu- 

 late (a line long), green with a white margin, exceeding the strongly 



