AlUSTOLOCIIIACE^E. (iJIUTIIWOIlT I'AMILY.) 371 



Division III. APP:TAL0US EXOGENOUS PLANTS. 



Floral envelopes single, consisting of a calyx only, or alto- 

 gether wanting. 



OuDKU lO.J. ARISTOLOCIIIACEiE. (Bihtiiwout 

 Family.) 



Herbs or woodv vines, with alternate pctioled mostly cordate and entire 

 leaves, and solitary peduncled dull-colored flowers. — Calyx ailhercnt to 

 the 6-celled ovary, tubular, valvate in the bud. Stamens G- 12, more or 

 less united with the styles : anthers adnate, extrorsc. Fruit G-celled, few 

 - many-seeded. Seed anatropous. Embryo minute, at the base of ileshy 

 albumen. 



1. ASARITM, Tourn. AsXnAnACCA. 



Calyx regular, S-lobed. Stamens 12, the filaments pardy united with tho 

 style, and usually prolonged beyond the anthers. Capsule fleshy, globose, open- 

 ing irregularly — Aromatic perennial herbs, with creeping stems, long-pciioleJ 

 cordate or kidney-shaped leaves, and axillary peduncled flowers. 



^ I. AsARUJi. — Caljx bell-shapeJ, adnate to the ovari/, 3-parted : filaments free or 

 nearlj so : stigma G-lohed. — Leaves deciduous. 



1. A. Canadense, L. (Wild Ginger-root.) Pubescent; leaves 2, kid- 

 ney-shaped ; calvx-lob^'s acuminate ; filaments as long as the style. — IMountains 

 of North Carolina, and northward. April and May. — Flowers short-pcduncled, 

 purple within. 



§ 2. IlKTEROTRorA. — Calijx inflated, nearlj free from the ovari/, 3-cl('P.- fila- 

 ments united with the ovartj : sli/les 6 ; sli(/mas 2-cleft. — Leaves evenjrcen, smooth, 

 mottled. 



2. A. Virginicum, L. Leaves round-cordate; calyx inflated-bell-shapcd, 

 with round'-'d lobes; stigmas deeply 2-cleft. — Rich shady woods in the upper 

 districts, Georgia, and northward. April and May. — Leaves single or 2-3 

 together, 2' long. Flowers 8" - 9" long, nearly sessile at tho base of tho petioles, 

 greenish widiout, dull purple within. 



.3. A. arifolium, Michx. Leaves oblong-cordate ; calyx pitcher-shaped, 

 with rounded lobes ; stigmas slightly 2-clcft. — Shady woods in the lower dis- 

 tricts, Florida to North Carolina. March and April — Leaves .3'- 4' long, 

 auriculate at the base, long-petioled. Calyx 1' long, distinctly peduncled, con- 

 tracted above the middle, dark purple within. 



2. ARISTOLOCHIA, Toum. Birthwoht. 



Calyx tubular, commonly bent and inflated above the ovarv. Anther'^ f>, sc.i- 

 sile, adnate to the 3 - 6dobcd or angled stigma. Capsule 6-valvcd. — Erect or 



