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536 3. Asarum lemmoni S. Wats. Lemmon's Wild Ginger. Fig. 1298.

Asarum lemmoni S. Wats. Proc. Am. Acad. 14: 294. 1879. Rootstocks slender, elongated, bearing 2 leaves at a joint. Leaves cordate-reniform, 4-8 cm. long, and usually a little broader, rounded at the apex, dark green and glabrous above, ciliate on the margins, the lower sur- face and the petioles more or less floccose ; peduncle slender, about 2 cm. long; calyx about 8 mm. broad, brownish purple ; the lobes ovate, merely acute, 8-10 mm. long ; the prolonged free apex of the connective much shorter than the anther; styles united. Coniferous forests, Transition Zone; Sierra Ne- vada, from Plumas to Tulare Counties, California. Much less common than A. hartwegi. Type local- ity: Sierra County, California.

2. ARISTOLOCHIA [Toitrn.] L. Sp. PI. 960. 1753.

Perennial erect climbing or twining herbs or shrubs. Leaves alternate, cordate, entire or lobed, palmately nerved. Flowers solitary or clustered, irregular, greenish or lurid purple. Calyx more or less adnate to the ovary, the tube usually inflated around the style and con- tracted at the throat, deciduous, the limb spreading or reflexed entire, 3-6-lobed or appendaged. Stamens usually 6 ; anthers sessile adnate to the short style or stigma. Ovary 6-celled with 6- parietal placentae. Styles 3-6-lobed. Capsule naked, septicidally 6-valvied. Seeds compressed, their sides flat or concave. [Named for its reputed medicinal properties.] About 200 species, widely distributed in tropical and temperate regions. Besides the following about 9 other species inhabit eastern and southern United States. Type species, Aristolochia rotunda, L. 1. Aristolochia californica Torr. California Pipe-vine. Fig. 1299.

Aristolocliia californica Torr. Pacif. R. Rep. 4: 128. 1857. Stems woody, climbing to a height of 3-4 m., the slender branches more or less pubescent or short-tomentose. Leaves ovate-cordate, 4-15 cm. long acutish or obtuse, tomentose on both surfaces ; petioles slender, 15-45 mm. long ; peduncles slender, solitary, with a small f oliaceous bract near the middle ; calyx- tube closely doubled on its self near the middle, strongly saccate, greenish purple, 20-40 mm. to the top of the curviture, 10-15 mm. broad, the limb 2-lipped; ovary linear-clavate ; capsule obovate, narrow to a slender base, 30-40 mm. long, 6-winged ; seeds deeply concave. Stream banks and bord'ers of lakes. Upper Sonoran Zone; foothills at the head of Sacra- mento Valley south to Eldorado and Monterey Counties, California. Type locality: near Corte Madera, California.