BUCKWHEAT FAMILY 69 



1. A. canadense L. WILD GINGER. Plant soft-hairy. Leaves 2, 

 large, kidney-shaped, oil long petioles, with the flower borne on a 

 short peduncle between them. Flower greenish outside, brownish- 

 purple inside. Calyx lobes epigynous, taper-pointed, widely spread- 

 ing, relaxed at the tip. Rich, shady woods, common N. 



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, f f in. 

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

 Rich, shady woods.* 



II. ARISTOLOCHIA L. 



Erect or twining perennial herbs or woody vines. Leaves 

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

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

 Calyx perigynous or epigynous, tubular, irregular. Stamens 

 mostly 6, sessile, apparently united to the angled and fleshy 

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

 very numerous.* 



1. A. macrophylla Lam. DUTCHMAN'S PIPE, PIPE VINE. A tall 

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

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

 Calyx li in. long, bent into the shape of a pipe, its border abruptly 

 spreading, brownish -purple. Rich woods, 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, mostly 

 solitary, on slender peduncles. Calyx bent in the shape of a pipe, 

 yellowish-green with a dark purple throat, limb unequally 3-lobed, 

 rugose, reflexed. Anthers in pairs below the 3 spreading lobes of the 

 stigma. Capsule oblong. Stems sometimes 30 ft. long. Rich woods S.* 



25. POLYGONACEJE. BUCKWHEAT FAMILY 



Herbs with alternate, entire leaves, and usually with sheathing 

 stipules above the swollen joints of the stem. Flowers apeta- 

 lous, generally bisexual, with a 3-^-cleft calyx, generally colored 

 and persistent. Fruit a compressed or 3-angled akene, inclosed 

 in the calyx ; seeds with endosperm, which does not generally 

 inclose the embryo. Stamens 4-12, on the base of the calyx. 



