96 STUDIES IN SEEDS AND FRUITS 



Stellaria Holostea Caryophyllaceae 



Swietenia Mahogani (Mahogany) Meliaceas 



* Tamarindus indica (Tamarind) Leguminosae 



Tamus communis Dioscoreae 



Theobroma Cacao (Cocoa) Buttneriae 



Vicia sativa Leguminosae 



Results concerning some of the above Impermeable and 

 Variable Seeds from Professor Ewart's T'ables [Proc. 

 Roy. Soc. Vict. 1908). His results for seeds more than 1 5 or 

 16 years old are not given. 



Adenanthera pavonina^ seeds 8 years old, swelled after filing. 



JIbizzia Lebbek, seeds 1 1 years old, scratching needed for 

 germination. 



Canavalia gladiata^ 10 years old, i out of 6 seeds required filing 

 for germination. 



Canavalia obtusifolia., 16 years old, required sulphuric acid for 

 germination. 



Erythrina indica^ of 50 seeds, 8 years old, 6 swelled in water. 



Guilandina bonducella^ seeds 15 years old, required the acid for 

 swelling. 



Leucana glauca., seeds 1 5 years old, all swelled in water. 



Mucuna urem^ lO years old, required filing for swelling. 



Poinciana regia., 9 years old, outer skin impermeable until filed. 



Imperme- Those who have studied the dispersal of seeds by the 



dispersafby ocean-currents have laid stress on the circumstance that many- 

 water, of the seeds capable of transportal over wide tracts of sea 

 belong to leguminous plants ; and I need here only allude 

 to the circumstance that the four West Indian and Central 

 American seeds {Dioclea reflexa^ Mucuna urens, Guilandina 

 bonducella^ Entada scandens) that are most frequently stranded 

 intact on the western shores of Europe belong to this order. 

 When Professor Ewart remarked (p. 1 84) that " macro- 

 biotic " seeds show no special adaptation for dispersal and 

 that " none are wind or water-borne," he apparently had 

 forgotten that there are included in his list the seeds of plants 

 like Canavalia obtusifolia, Erythrina indica., and Guilandina 



* Tamarind seeds absorb water very slowly at first, requiring often an immersion of 

 a week or more before there is any marked increase in the weight. 



