CLASS IV. 
TETRANDRIA. 
MONOGYNIA. 
(1) Flowers of two petals and one seed : superior : Incorporated. 
DIP'SACUS. Cal. common, leafy : Receptacle conical; chaffy: 
Seeds like little pillars. 
SCABIO'SA. Cal. common, of many leaves : Receptacle con¬ 
vex, somewhat chaffy : Seed crowned, enveloped in the 
crip. 
(2) Flowers of two petals , and two seeds. Incorporated. 
ERIOCAU'LON. Barren and fertile florets incorporated in 
the same head ; the former in the centre, the latter in the 
circumference. 
Cal. common, many scales, compact, imbricated. 
F. Caps, two or three celled, seeds solitary. 
(3) Flowers of one petal: beneath the germen. 
LITTOREL'LA Barren and fertile flowers on the same plant: 
Blass, four cleft. 
B. Cal. four leaved : Slam, very long. 
F. Cal. none: Bloss. mostly four cleft: Style long: 
Seed a nut. 
CENTUN'CULUS. Bloss. wheel-shaped, expanding: Cal 
with four divisions : Caps, one cell, cut round. 
PLANTA'GO. Bloss. bent back as if broken : Cal. with four 
divisions : Caps, two celled, (rarely four. Sm. E.) burst¬ 
ing all round transversely. 
EX'ACUM. Bloss. rather bell-shaped : Cal four leaved : 
Caps, two celled, compressed. 
£Gentiana campestris and filiformis.] 
