ee ~ 
ORD. XV. ROTACEA. 
(From Rota, a Wheel.) 
Plants with wheel-shaped flowers, or expanded horizontally, and 
without a tubular base. 
ee 
GENTIANA PURPUREA. - : PURPLE GENTIAN. 
eo 
SYNONYMA,. Cursuta. Pharm. Edinb. Gentiana major pur- 
purea, Bauh. Pin. 187, Gentiana major flore purpureo. Flor. 
Dan.t.50. -Gentiana corollis paniformib icillatis, foliis 
imis petiolatis ellipticis. Hall. Helv, Gentiana purpurea. it. 
Hort. Kew.. Jacquin. Obs. 2. t. 39. 
Pentandria Digynia. Lin. Gen. Plant. 322. 
Gen. Ch. Cor. monopetala. Caps. 2-valvis, 1-locularis: Receptaculis. 
2, longitudinalibus. 
Sp. Ch. G.corollis subquinquefidis campanulatis verticillatis, caly- 
cibus truncatis, 
; 
ROOT perennial, cylindrical, slender, branched; externally 
brown, internally yellowish. Stem erect, simple, smooth, strong, 
succulent, rising to a foot in height. Lower leaves nearly elliptical, 
ribbed, entire. Upper leaves in pairs, sheath-like, concave, em- 
bracing the stem, pointed, ribbed, enclosing the flowers, Flowers 
