120 ME. C. B. CLAEKE ON INDIAN BEGONIAS. 



hiscence " as taking place round elliptic lines on the faces of the 

 capsule within tbe ribs ; the faces I consider not caducous, as they 

 only tear off long after the ripe seeds have been scattered, and 

 then the faces with the septa usually break from the axis, leaving 

 the broken down capsule as a mere skeleton consisting of the 

 three persistent ribs, with the fragments of the axis and the pla- 

 centae in the centre. Sir J. D. Hooker not considering that the 

 dehiscence and the final breaking down of the capsule can be de- 

 finitely distinguished, this character has been sunk in the account 

 of Begonia in the ' Flora of British India.' 



EXPLANATION OF THE PLATES. 

 N.B. The figures are enlarged 2 diameters except where otherwise stated. 



Plate I. 

 Fig. 1. Begonia Boxburghii, A. DC. a. Fruit (pendent), succulent, b. Hori- 

 zontal section of fruit ; plane passing through the line * 



showing the placentae hut not the seeds, c. Seed, rich brown ; the 

 margins of the cells of the testa slightly raised, X 25 diameters. 



2. B. tessericarpa, C. B. Clarke, a. Fruit (leathery), b. Outline of an 



imaginary horizontal section ; plane passing through the line * . . . . 



3. B. silhetensis, C. B. Clarke, a. Fruit, woody, b. Horizontal section of 



fruit (the examples do not show whether the placentas are single or 

 double) ; plane passing through the line * . . . . 

 •4. B. infiata, C. B. Clarke, a. Fruit, leathery, b. Horizontal section of 

 fruit ; plane passing through the line *....; showing the placenta; 

 but not the seeds, c. Seed, rich brown ; the margins of the cells of 

 the testa slightly raised, x 25 diam. 



5. B. verticillata, Hook. a. Capsule, dehiscing by the irregular breaking 



up of the papery faces of the carpels, b. Seed, brown, the margins 

 of the areola; of the testa beaded by reason of the microscopical 

 papilla;, X 25 diam. 



6. B. prolifera, A. DC. a. Capsule, nearly as in B. verticillata. b. Seed, 



brown ; margins of the areolae of the testa slightly raised, not 

 beaded, X 25 diam. 



7. B. simiata, Wall. a. Capsule, b. Horizontal section of capsule ; plane 



passing through the line # . . . ; placenta; shown, seeds not shown. 



8. B. andamensis, Parish. Capsule nearly as in B. sinuata. 



9. B. crenata, Dryander. a. Capsule, b. Horizontal section of capsule ; 



plane passing through the line *....; placenta; shown, seeds not 

 shown. 



10. B. delicatula, Parish, a. Capsule (subdorsally dehiscent). b. Hori- 



zontal section of capsule; seeds not shown, c. Seed, brown, X 25 

 diam, 



11. B. alcecida, C. B. Clarke, a. Fruit, half-ripe, from the side. b. Horizon- 



tal section of half-ripe fruit ; plane passing through the line *....; 

 placentas shown, but not the seeds, c. Dehiscent fruit looked down 



