PL ex, cal. 39. COMPOSITE, C. 240. Tussilago. 473 
and consumptive cases; a strong decoction of the dried 
leaves of service in scrofulous cases; dried leaves the basis of 
cephalic snuffs; down on the under surface used as tinder. 
LXVI. 241. PETASITES. Dioscorides. Butter-bur. 
Pericline cylindrical, conical, becomes bellied, and then 
entirely turned back; scales many, linear, equal, in one 
series ; calathides flosculous, flat at top ; flowers all fertile ; 
of the centre funnelshape, equal, 5-toothed, androgynous; 
of the rays threadlike, oblong, slightly 5-toothed, female; 
sometimes flowers all of one sort; clinanthus flat, dotted, 
naked; akenium roundish ; pappus hairlike, rough, sessile. — 
Herb flowering before the leaves appear; calathides nu- 
merous ; peduncles bracteated ; leaves radical. 
Petasiles vulgaris . Common butterbur. 
Thyrse oblong ; leaves oblong, heartshape, unequally 
toothed, beneath downy, lobes approximating. 
Petasites, Rail Syn. 179, 1 ; Ger, em. 814, 1. 
Petasites vulgaris, Park. 419. 
Tussilago Petasites, Lin. S. P. 1215. 
Pestilent wort. 
Moist meadows ; perennial; March and April. 
Rhizoma thick, fleshy, creeping ; scales upright, woolly ; 
leaves very large ; bractece lanceolate ; thyrse ovate ; flowers 
uniform, all tubular, hermaphrodite ; pappus as long as the 
pericline. — Rhizoma resinous, bitter, acrid, and strong 
smelling ; the leaves afford shelter to small animals. 
<3. elongata. Thyrse oblong; flowers 1 to 3 hermaphro- 
dite, rest all female, irregularly 5-toothed ; pappus shorter 
than the pericline. 
Petasites major, floribus pediculis longis insidentibus, Dillen in Rail 
Syn. 179,2. 
Tussilago hybrida, Lin. S. P. 1214. 
LXVII. 242. EUPATORIUM. Dutch-agrimony . 
Pericline oblong ; scales few, oblong, equal, slightly im- 
bricate; calathides flosculous ; flowers few, all hermaphro- 
dite; corollae tubular, regular, 3-cut; pollen white; style 
long; branches linear, divaricating; stigmata glandular; 
clinanthus convex, naked, bald; akenium 4-sided, streaked; 
pappus hairlike, rough. — Leaves opposite; calathides co- 
rymbose. 
