32 
DESCRIPTION OF MEDICINAL PLANTS. 
more slender than the former. “ Aromaticum ” is a misnomer, 
for it is not scented. Head 8-30 flowered; involucral scales 
nearly equal, in one row ; leaves opposite, ovate, on short peti- 
oles, rather obtusely-toothed, not pointed, tickish. Stems 
nearly simple, flowers white. The oak-barrens of Middle 
Tennessee are literally “full of it.” The roots, collected in 
autumn. 
Eupatorium purpureum, L. Joe-Pye Weed. Grayelroot. 
Generally very tall; stems 6-12° high, stout and simple; 
leaves 3-6 in a whorl, oblong ovate or lanceolate, pointed, 
very veiny, roughish, toothed; corymbs very dense and com- 
pound. Heads cylindrical, 5-15 flowered; the purplish 
scales numerous, closely imbricated in several rows, of un- 
equal length, slightly striate. Receptacle flat, flowers pur- 
ple. Low, damp ground, flowering late in July and August. 
Abundant everywhere. The leaves and flowering tops are 
used. 
Eupatorium ageratoides, L. White Snake- root. A handsome 
white-flowered species, available as a decorative plant in gar- 
dens and conservatories. Smooth, branching 3-4° high ; 
leaves opposite, broadly ovate, long petioled, triple-nerved, 
pointed, coarsely and sharply toothed. Corymbs compound ; 
heads 8-30 flowered; involucral scales nearly equal, in one 
row. Rich, moist soil, always in great numbers wherever it 
occurs. FI. September. The root is collected. 
Liatris squarrosa, Willd. Blazing-Star. Perennial herb with 
simple stems from a roundish corm or tuber, often hairy, 
6'- 2° high ; leaves rigid, linear, elongated ; heads usually 
few, V long ; scales mostly with elongated and leaf-like, 
spreading tips. Pappus very plumose, corolla- lobes hairy 
within. The handsome rose-purple flowers spicateor racemed. 
Highlands of Middle Tennessee. In great numbers at 
Greenbrier and Paradise Ridge, Davidson and Robertson 
Counties. The rootstock of this and the following. 
Liatris scariosa, Willd. Rattlesnake Master. Stouter than 
the former, stems 2-5° high, pubescent or hoary ; leaves 
