(51) 



7. Acantliomintlia. — Lower pair of stamens 

 ascending. Cells of tlie anthers divar- 

 icate. Caljx 2- labiate, teeth spinose. 



8. Lophanthus. — Upper pair of stamens 

 longer and declined, lower pair shorter 

 and ascending. Anther cells parallel. 

 Calyx 15-nerved. 



9. Trichostemma. — Stamens long-exserted, 

 lower pair longer. Tube of corolla slen- 

 der; limbS-cleft, lobes oblong, declined. 



II. Angiospermia. 



A. Base of the antlier cells mucronate. 



a. Ovary 1-celled oo- ovulate, placentae, 

 parietal. 



1. Anoplanthus. — Flowers without bract- 

 lets. Parasitic. Chlorophyll 0. 



2. Aphyllon. — Flowers with bractlets. 

 Parasitic. Chlorophyll 0. 



b. Ovary '2-celled, oo-ovalate. Fruit 1- 

 co-seeded. 



1. Pedicularis. — Calyx 5-dentate, superior 

 lip of corolla laterally compressed. 



B. Base of anther cells not mucronate. 



a. Ovary 1-celled. Placenta co-seeded^ 

 central. 



1. Limosella. — Calyx 5-dentate. Corolla 

 sub regular. 



