BUCKWHEAT FAMILY 69 
1. A. canadense L. Witp Gincer. Plant soft-hairy. Leaves 2, 
large, kidney-shaped, on 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. Virginta 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, 3-3 in. 
long; tube inflated below, narrow at the throat, lobes spreading. 
Rich, shady woods.* 
Il. ARISTOLOCHIA L. 
Erect or twining perennial herbs or woody vines. Leaves. 
alternate, heart-shaped at the base, palmately nerved, petioled, 
entire. Flowers zygomorphie, 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. Durcuman’s Pirz, 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 1} in. long, bent into the shape of a pipe, its border abruptly 
spreading, brownish-purple. Rich woods, often cultivated. 
2. A. tomentosa Sims. Dutrcuman’s Pirz. 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. POLYGONACEZ. BuckwHeEat Faminy 
Herbs with alternate, entire leaves, and usually with sheathing 
stipules above the swollen joints of the stem. Flowers apeta- 
lous, generally bisexual, with a 3-6-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. 
