ASARACEAE 1281 
ASARUM [Tourn.] L. Acaulescent gingerous herbs. Leaves in pairs: 
T not lustrous. Flower-stalks arising between the petioles. Hypanthium 
d pubescent. Sepals brown within, deciduous. Capsule ed Seeds 
——About 20 species, natives of Loi north temperate one = Spi .—The 
de are not evergreen, with thick- ous blad HEU GINGERS. 
Sepals triangular, merely acute, about as long as the hypanthium or Pa se 
1. reflexum. 
Sepa lanceolate-acuminate, longer than the hypanthiu 
p n ed longer than the hypanthium, i tubular por- 
g: 
species mainly Alleghen 2. A. canadense. 
Sepals ach: longer than the hypanthium, the EAT por- 
n 10-20 mm. long: species campestrian 3. A. acuminatum. 
1. A. reflexum Bicknell. Leaf-blades reniform, 6-14 wide, the sinus 
owers smaller than those of the preceding Bi ` sepals 8-10 mm. 
k 
i — 
hillsides and rich woods, various provinces 
N of Coastal Plain, N. C. to Kans., Ia., and ; 
' Conn. i 
2. A. canadense L. Leaf-blades reniform, 
ide, the sinus closed: hypanthium 
the tubular portions curving upwar 
woods and rocky hillsides, various provinces, 
N. C. to Ark., (La.?), Ont., and N. B. 
p aei bd eure dun epa 
lar bu ore pubesce 
bd n pid Hay een sepals gradu. 
ally acuminate, the tubular tips recurved- 
spreading.— Woods, Blue Ridge and are northern provinces, Tenn to Minn. 
TA ETRE Peattie is said to differ from A. canadense and A. 
wm by its larger flowers and less pubescent 1 leaf-blades, and also Gon the 
ene by its qudd sepals. It occurs in the mountains of N. C. 
3. ARISTOLOCHIA [Tourn.] L. Caulescent herbs, shrubs, or vines 
Leaves with narrow or broad blades. Flowers irregular, often S-shaped or 
c a ‘‘dutch pipe,’’ the calyx usually corolloid. Hypanthium often 
rib ary inferior. Styles united aang an ee — 
meu duae Mic 200 species, in tropic 
c" 
(gs) 
Erect herbs: flowers borne at the base of the stem: calyx-tube swollen at each end. 
I. HASTATAE. 
Twining vines: flowers borne along the branches. 
Herbaceous vines: calyx-tube swollen at the base: calyx- 
limb expanded on one side: stamens 5. II. PENTANDRAE. 
Woody vines: calyx-tube swollen m "e middle :. calyx- 
limb expanded on all sides: stamens 6. III. MACROPHYLLAE. 
I. HASTATAE 
Plant sparingly and indistinctly pubescent with soft hairs: 
capsule sparingly pubescent. 
Leaf-blades hastate, delicate: capsule 5-6 mm. long or 
rarely longer. 1. A. hastata. 
Leaf-blades not hastate, membranous: capsule about 1 cm. 
lang. 2. A. Serpentaria. 
Plant manifestly pubescent with stiff spreading hairs: cap- - 
sule copiously pubescent. 3. A. convolvulacea. 
8l 
