Ill, C. ENDOGENS WITH FREE PERIANTH. 
Outer perianth petal like. 2 
Outer perianth green, or sometimes glume-like. 
Carpels combined into a solid pistil. 1 
Carpels more or less separate. 
Placentas parietal, forming a net work on the inner surface 
of the ovary. Fruit many seeded. Butomace.e. p. 320. 
Placentas in the axis, or at the base of the ovary. 
Anthers opening on the outer side. Embryo straight, with a 
slit on the side, near the base. Juncagenyee. 
Anthers opening on the inner side. Embryo curved like a 
horseshoe, with no slit. AlismacE.e. p. 319. 
X. — Whorls of the perianth alike, Usually dry and glume-like. 
JuitCACE,E. p. 349. 
Whorls of the perianth visibly different. 
Placentas in the axis. Anthers two celled. 
Comwelynaceas. p. 350. f 
Placentas parietal. Anthers one celled. Mayacaceas. 
2 , — - Carpels combined into a solid pistil. 3 
Carpels more or less separate. 
Seed solitary. Flowers on a scaly spadix. 
Palm.®, p. 316. f 
Seeds numerous. Flowers not on a spadix. 
Anthers opening on the outer side. Meeanthaceje. p. 337. 
Anthers opening on the inner side. 
Perianth of six parts. Butomaceje. p. 320. 
Perianth of two parts. PhilYdracead. 
3 # — Anthers opening on the outer side. Outer perianth glume- 
like. Xyridac e.e. p. 351. 
Anthers opening on the inner side. 
Flowers more or less irregular. Perianth rolling inwards 
after expansion. Aquatic. Pontederiaceje. p. 322. 
Flowers regular. Perianth not rolling inwards. 
