494 ORDER CVI. ABISTOLOCHIACEiE. 



under surface. Peduncles axillary, solitary, shorter than the leaf, bear- 

 ing 3 — 8 flowers. Flowers small. — Whitish-yellow. ^ . Moist places. 

 Middle Car. and Geo. 2—5 feet. 



Order CVL— ARISTOLOCHIA'CE^E. (Birthwort Family.) 



Flowers perfect. Perianth superior, tubular, 3-cleft, regu- 

 lar, or sometimes very unequal ; aestivation valvate. Stamens 

 G — 12, epigynous. Ovary inferior, 3 — 6-celled. Ovules nu- 

 merous. Styles simple. Stigmas radiating, equal in number 

 to the cells of the ovary. Fruit capsular, 6-celled, many-seed- 

 ed. Leaves alternate, simple. Flowers axillary, solitary, of a 

 brownish dull color. Herbaceous or shrubby plants, the latter 

 usually climbing. 



Genus I. —AS' ARUM. L. 18—12. 

 (From the Greek a, privative, and saron, feminine.) 



Perianth campanulate, urceolate, 3 — 4-cleft. Stamens 12, 

 placed upon the ovary. Anthers attached to the side of the 

 filament. Style short. Stigma stellate, 6-lobed. Capsule 6- 

 celled. 



1. A. Can-aden'sk, (L ) Leaves by pairs, broad, reniform. Perianth 

 woolly, deeply 3-parted, segments sub-lanceolate, reflexed. Peduncles 

 short. — U- April. Rich soils. Wild Ginger. 



2. A. Virgin'icum, (L.) Leaves solitary, cordate, nearly round, cori- 

 aceous, glabrous spotted. Perianth glabrous, externally short, cam* 

 panulate, with obtuse segments. — 1£. April. Rocky woods. 



3. A. arifo'lium, (Mich.) Leaves several from each root, hastate, 

 cordate, variegated, on long pubescent petioles. Perianth urceolate, 

 dark purple, border 3 cleft, pubescent within. Filaments 12, short. 

 Anthers linear. Seed few in each cell. — 2£. March — April. Loose 

 soils. Very common. 



Genus II.— ARISTOLO'CHIA. L. 18—6. 

 (From aristos, best, and locheia, parturition.) 



Flowers gynandrous. Perianth, tubular, ligulate at the apex, 

 ventricose at the base. Anthers 6, sub-sessile, inserted into the 

 style. Stigma 6-cleft. Capsule C-sided, 6-celled, many-seeded. 



1. A. si'pho, (L'Her.) A vine, climbingover large trees. Leaves very 

 large, cordate, acute, alternate, sprinkled with hairs. Flowers solitary, 

 pedunculate, with an ovate bract at the base. Perianth ascending, 

 somewhat tubular, the border 3-cleft, brown. — ^ . June. Mountains. 



Dutchman s Pipe. 



2. A. tomento'sa, (Sims.) Stem twining, ascending the loftiest trees. 

 Leaves nearly round, cordate, tomentose beneath, strongly veined. Pe- 

 rianth villous, the border 3-cleft, nearly equal, the orifice oblique, green- 

 ish-yellow, with the margin dark purple. Stigmas 3. — ^. June. 

 Mountains. 



