520 LiLiACE^. (lily family.) 



§ 1. Stems herbaceous, not prick! ij ; flowers corrion-scented ; ovules 2 in each cell ; 

 leaves membranous, mucronate-tipped ; berries bluish-black with a bloom. 



1. S. herbacea, L. (Carriox-Flower.) Stem climblng,3-15° high; 

 leaves ovate or rounded, mostli/ heart-shaped or truncate at base, abruptly acute 

 to short-acuminate, 7-9-nerved, smooth; petioles -^-1' long; peduncles elon- 

 gated (3-4' long, or sometimes even 6-8' and mucli longer than the leaves), 

 20 - 40-flowered ; seeds 6. — Moist meadows and river-banks: common, from 

 the Atlantic to Minn., Mo., and Tex. June. Very variable. — Var. pulver- 

 ULENTA, Gray, has the leaves more or less soft-downy beneath. 



2. S. tamnifolia, Michx. Stem upright or climbing; leaves mostli/ 5 

 nerved, smooth, broadly ovate to lanceolate, truncate or cordate at base, ab- 

 ruptly acute to acuminate, some of them hastate with broad rounded lobes ; 

 peduncles longer than the petioles ; berry smaller, 2 - 3-seeded. — Pine-barrens, 

 N. J. to S. C. 



3. S. ecirrhata, Watson. Erect, ^-3° high, without tendrils (or only the 

 uppermost petioles tendril-bearing), glabrous ; lower leaves reduced to narrow 

 scale-like bracts, the rest thin, 5 - 7-nerved, broadly ovate-elliptical to roundish, 

 acute, mostly cordate at base, 2 - .5' long, sometimes verticillate, sparsely pu- 

 bescent beneath; peduncles about equalling the petioles (1 -2y long), on the 

 lower part of the stem; umbels 10 -20- flowered; berry 3-seeded. — Md. to 

 S. C, west to Mich, and Mo. May, June. 



§ 2. Steins woody, often prickly ; ovules solitary ; glabrous throughout. 



* Leaves ovate or roundish, etc., most of them rounded or heart-shaped at base, and 

 5 - 9-nerved, the three middle nerves or ribs stronger and more conspicuous. 



•i- Peduncles shorter or scarcely longer than the petioles (2 - &"), flattened ; leaves 



thickish, green both sides. 



4. S. TValteri, Pursh. Stem low, somewhat angled, prickly near the base 



or unarmed ; leaves ovate to ovate-lanceolate or oblong, somewhat heart-shaped or 

 rounded at base (3-4' long) ; berries coral-red. — Pine barrens, N. J. to Pla. 



5. S. rotundifolia, L. (Common Greenbrier. Horse-brier.) Stem 

 armed with scattered prickles, as well as the terete branches ; branchlets more 

 or less 4-angular ; leaves ovate or round-ovate, often broader than long, slightly 

 heart-shaped, abruptly short-pointed (2-3' long); berries blue-black, with a 

 bloom. — Moist thickets, N. Eng. to Ga., Avest to Minn, and Tex. Very vari- 

 able, passing into var. quadraxgulXris, Gray, which has branches, and espe- 

 cially branchlets, 4-angular, and is more common west. 



•i- •»- Peduncle longer than but seldom tivice the length of the short petiole, flat 

 iened ; leaves tardily deciduous or partly persistent ; berries black, with a 1)1 oom. 



6. S. glauca, Walt. Terete branches and somewhat 4-angular branchlets 

 armed with scattered stout prickles, or naked ; leaves ovate, rarely subcordate, 

 glaucous beneath and sometimes also above, as well as the branclilets when young 

 (about 2' long), abruptly mucronate, the edges smooth and naked. — Dry 

 thickets, E. Mass. to Fla., west to S. Ind., Mo., and Tex. 



7. S. bona-nOX, L. Branches and the angular (often square) branchlets 

 sparsely armed with short rigid prickles; leaves varying from round-heart- 

 shaped and slightly contracted above the dilated base to fiddle-shaped and hal- 

 berd-shaped or 3-lobed, green and shining both sides, cuspidate-pointed, the 



