110 KEY AND FLORA 
(rarely crimson), linear-lanceolate, hardly longer than the calyx 
lobes. Boggy ground. 
2. S. virginiensis Michx. Earnty SaxirraGe, MayFrLower. 
Perennial. Apparently stemless, with a cluster of spatulate, obovate, 
or wedge-shaped basal leaves, and a scape 3-9 in. high, which bears 
a dense cluster of small white flowers, becoming at length a panicled 
cyme. Petals white, oblong, much longer than the calyx. Rocks and 
dry hillsides N.° 
Wl. TIARELLA L. 
Perennial. Flowers white, in racemes. Calyx white, 5- 
parted, nearly hypogynous. Corolla of 5 very narrow petals, 
with slender claws, alternating with the calyx lobes. Stamens 
10, springing from the calyx tube and extending outside the 
flower. Styles 2, long and slender; ovary 1-celled, 2-beaked. 
In fruit one of the carpels grows to be much larger than the 
other, thus making up the main bulk of the thin, dry pod, 
which has a few seeds attached near the bottom. 
1. T. cordifolia L. Faust Mirerwort. Stem 5-12 in. high, 
usually leafless, sometimes with 1 or 2 leaves. Rootstock bearing 
runners in summer. Leaves heart-shaped, sharply lobed, the lobes 
with acute or mucronate teeth, somewhat hairy above, downy be- 
neath. Raceme short and simple. Rocky woods, especially N. 
Ill. HEUCHERA L. 
Perennials, with’a tall scape and roundish, heart-shaped 
basal leaves. Flowers rather small, greenish or purplish, in a 
long panicle. Calyx 5-cleft, the tube somewhat perigynous. 
Petals 5, small, spatulate, inserted with the 5 stamens on the 
margin of the calyx tube. Capsule 1-celled, 2-beaked, splitting 
open between the beaks. 
1. H. americana L. Common Aum Root. Scapes 2-4 ft. high, 
rather slender, often several from the same root, hairy and glandu- 
lar. Basal leaves large and long-petioled, abundant, somewhat 
7-lobed. Flowers whitish with a tinge of purple, in a loose panicle. 
Stamens projecting considerably outside the flower, their anthers 
of a bright terra cotta color. The root is very astringent and is 
somewhat used as a home remedy. Shaded banks, fence rows, and 
‘thickets; common W. 
