12 
DESCRIPTION OF MEDICINAL PLANTS. 
stems erect, hairy; leaves about 5-parted, the wedge-shaped 
divisions lobed and cut at the end. Leaves somewhat white- 
blotched, when matured. May-June. Rich woodlands,, 
common. Rhizome, collected in autumn. 
Oxalis Acetosella, L. Common Woodsorrel. Small, delicate 
perennial, with sour watery juice, stemless ; leaves and sepals 
arising from a creeping and scaly-toothed rhizome. Leaves 
3-foliolate, leaflets obcordate, closing and drooping at night- 
fall ; scape 1-flowered, 2-5' high. Sepals 5, persistent; petals 
5, white, with reddish veins, often notched. Stamens 10;. 
styles 5. Pod oblong, membranaceous, 5-celled, more or less 
5-lobed, each cell opening on the back ; valves persistent, 
being fixed to the axis by the partitions. In our State only 
on the summit of the Smoky Moutains. The herb in flower. 
Impatiens pallida, Nutt. Jewel Weed. False Touch-me-not. 
Glabrous annual herb, with thick succulent stems, enlarged 
at the joints, where the alternate undivided leaves are given 
off. Calyx and corolla colored alike and not clearly dis- 
tinguishable. Sepals apparently 4 ; the anterior one notched 
at the apex, probably consisting of two combined; the pos- 
terior one largest, and forming a spurred sac. Petals 2, une- 
qually sided and 2-lobed ; stamens 5 ; ovary 5-celled. Pod 
elastically dehiscent. Flowers pale-yellow, sparingly dotted 
with brownish-red. Shady, moist places, very common. 
FI. July-September. The leaves. 
RUTACEiE. (Rue Family.) 
Xanthoxylum Americanum, Mill. Prickly Ash. Shrub, with 
yellowish green flowers, appearing before the leaves. Flowers 
dioecious; calyx none; petals 4-5; pistils 3-5, with slender 
styles. Pods thick and fleshy, 2-valved, 1-2 seeded. Leaves 
pinnate, of 2-4 pairs of leaflets and one odd one, downy 
when young. Bark, leaves and pods very pungeut and aro- 
matic. The stems, and often the leafstalks, prickly. FI. 
April-May. Bark and berries officinal. Frequent in the 
limestone regions. 
