644 



ARISTOLOCHIACEAE. 



VOL. I. 



2. Hexastylis virginica (L.) Small. Virginia Hexastylis. Fig. 1575. 



Asarum virginicum L. Sp. PI. 442. 1753. 



Asarum heterophyllum Ashe, Contr. Herb, i : 3. 1897. 



H. virginica Small; Britton, Man. 348. 1901. 



Rootstocks slender, scaly, clustered, simple or 

 branched. Leaves 1-3 to each plant or branch, 

 coriaceous, glabrous, orbicular or broadly ovate, 

 rounded at the apex, iJ'-3' wide, usually mot- 

 tled, the basal sinus open or nearly closed; peti- 

 oles pubescent along one side or glabrous, 3 '-7' 

 long, ascending; flower short-peduncled, purple, 

 6"-8" long ; calyx campanulate to turbinate, nar- 

 rowed at the throat, its tube adnate to the lower 

 part of the ovary, free above, the lobes ovate or 

 nearly semicircular, about one-half as long as the 

 tube; peduncle i'-i' long; filaments much shorter 

 than the anthers ; anthers not pointed ; styles 6, 

 each 2-lobed, the stigmas sessile below the lobes ; 

 capsule hemispheric, about 4" high. 



In rick woods, Virginia and West Virginia to Geor- 

 gia and South Carolina. May-June. Southern wild 

 ginger. Black snakeweed. Heart-leaf. 



3. Hexastylis Memmingeri (Ashe) Small. 

 Memminger's Hexastylis. Fig. 1576. 



Asarum Memmingeri Ashe, Contr. Herb. 1 : 3. 1897. 

 Hexastylis Memmingeri Small; Britton, Man. 348. 1901. 



Slender. Leaf-blades suborbicular or ovate, ii'-3' long, 

 mostly obtuse or retuse, sometimes mottled, with a slightly 

 open sinus ; petioles about as long as the blades or much 

 longer; calyx $"-7" long, urn-shaped, the tube more or less 

 constricted at the throat; the segments rarely over \\" long, 

 obtuse ; peduncle as long as the calyx or shorter ; prolongations 

 of the styles slender, usually deeply cleft; capsule conspicu- 

 ously distending the calyx; seed sharply triangular. 



In sandy woods, Virginia and West Virginia, south to Georgia. 

 May and June. 



4. Hexastylis arifolia (Michx.) Small. Halberd or Heart-leaved Hexastylis. 



A. arifolium Michx. Fl. Bor. Am. i : 279. 1803. 

 H. arifolia Small; Britton, Man. 348. 1901. 



Pubescent, at least on the veins of the leaves, 

 rootstocks slender, usually branched and with 

 i or 2 leaves to each branch. Leaves rather 

 thick, usually mottled, 2'-s' long, some of them 

 hastate, some suborbicular, the basal sinus often 

 broad ; petioles more or less pubescent, 3'-8' 

 long; flower stout-peduncled, about i' long; calyx 

 urn-shaped, much contracted at the throat, the 

 lobes rounded, about one-fifth as long as the 

 tube, which is adnate to the lower half of the 

 ovary ; anthers nearly sessile, short-pointed ; 

 styles 6, 2-cleft, with a sessile stigma below the 

 cleft ; capsule subglobose, about 8" in diameter. 



In woods, Virginia to Tennessee, Florida and Ala- 

 bama. Ascends to 3000 ft. in Virginia. April-June. 



Hexastylis Ruthii (Ashe) Small, differing in the 

 calyx not constricted in the throat, ranges from 

 southwestern Virginia and Tennessee to Alabama. 



