ANGIOSPERMS. 



5H 



one-seeded lobes of the fruit; while in Boragineae the separation is still more 

 complete. The division of the five loculi of the ovary of Linwn into ten by spurious 

 dissepiments is not so perfect, the projections from the centres of the carpels not 

 reaching the central axis of the ovary. 



Fig. ■^.—Dictammcs hraxi7ielia; A young flower-bud, with rudiments of sepals j; bolder flower-bud, with rudiments of 

 petals/ ; C still older state, with rudiments of the five stamens a, five more stamens a' arise between them, of which three are 

 already visible ; b the bract, f a liracteole ; D—H development of the ovary //fe, sk ovules, ^p gyiiophore, g style. 



Before passing to the consideration of ovaries in which the ovules are borne by 

 the floral axis {i. e. with axial placentation), it should be mentioned that there are 

 cases in which the present state of our knowledge does not enable us to decide with 



Fig. 389.— Ripe fruit of riciammis Fraxiiiella ; the anterior carpel has been removed and the two lateral 

 ones opened ; g gfj'nobasic style (natural size). 



certainty whether the ovules arise from the axis or from the margins of the cirpels 

 which have become united to it; and these doubtful cases are possibly more 

 numerous than is generally thought. Payer's observations on Cerastium and Mala- 

 chium show that in Caryophylleae the expanded apex of the floral axis becomes 



002 



