DICOTYLEDONOUS PLANTS 65 



6 lobed, usually colored. Petals none. Stamens 6-12, inserted 

 on the ovary. Pistils 1, ovary mostly 6-celled, many-seeded.* 



I. ASARUM, Toum. 



Perennial, stemless, aromatic herbs, with slender, branch- 

 ing rootstocks. Leaves long-petioled, from kidney-shaped to 

 halberd-shaped. Plowers axillary, peduncled. Calyx regular, 

 3-lobed, Avithering-persistent. Stamens 12, the filaments par- 

 tially united with the style and usually prolonged beyond the 

 anthers. Ovary 6-celled with parietal placentse, many-seeded. 

 Mature capsule roundish, often somewhat fleshy.* 



1. A. canadense, L. Wild Ginger. Plant soft, hairy. Leaves 

 2, large, kidney-shaped, on long petioles, with the flow^er borne on a 

 short peduncle between them. Flower greenish outside, brownish- 

 purple inside. Calyx-tube wholly adnate to the ovary, calyx-lobes 

 taper-pointed, widely spreading, reflexed at the tip. Rich, shady 

 woods, common X. 



2. A. virginicum, L. Virginia Asarum. Leaves evergreen, 1-3 

 to each plant, smooth, mottled, round-cordate, entire, 2-3 in. long 

 and broad; petioles smooth or downy along one side, 3-7 in. long. 

 Flowers nearly sessile, greenish without, dull purple within, |-| in. 

 long, tube inflated below, narrow at the throat, lobes spreading. 

 Rich, shady woods.* 



n. ARISTOLOCHIA, Tourn. 



Erect or twining perennial herbs or woody vines. Leaves 

 alternate, heart-shaped at the base, palmately nerved, petioled, 

 entire. Flowers irregular, solitary, or in small clusters. 

 Calyx more or less adnate to the ovary, tubular, irregular. 

 Stamens mostly 6, sessile, adnate to the angled and fleshy 

 3-6-lobed or angled stigma. Capsule naked, 6-valved, seeds 

 very numerous.* 



1. A. Sipho, L'Her. Dutchman's Pipe, Pipe Vine. A tall 

 climber. Leaves dark green, smooth, round-kidney-shaped, some- 

 times 1 ft. wide. Peduncles 1-flowered, wdth a single clasping bract. 

 Calj^ 1^ in. long, bent into the shape of a pipe, its border abruptly 

 spreading, brownish-pnrple. Rich w^oods, often cultivated. 



2. A. tomentosa, Sims. Dutchman's Pipe. Stem woody, climb- 

 ing high, branches and leaves densely woolly. Leaves heart-shaped, 

 prominently veined, 3-5 in. long and broad. Flowers axillary. 



