GUMS, RESINS, AND OTHER VEGETABLE EXUDATIONS. 163 



Leguminosae (Acacia, Galactia); Araliaceae (Astrotriche); Prote- 

 aceae (Grevillea etc.); to which may be added Myrtaceae, the kino- 

 yielding Order par-excellence, but which also contains Syncarpia, 

 a resin-yielding genus. 



The following may be termed resin-yielding Orders, but they 

 exceptionally yield gums : — Euphorbiaceae (Aleurites); Liliaceae 

 ( Xanthorrhcea); Coniferae (Araucaria). 



The matter of production of gums, resins, and perhaps kinos in 

 the same Order is of great interest to the physiological botanist 

 in the lirst place and well worthy of investigation. 



As regards kinos, the Natural Order Myrtaceae is by far the 

 most important, but the following Australian Orders also yield 

 them, and accurate observation will greatly increase the list : — 

 Malvaceae, ( Adansonia, Bombax); Leguminosae, ( Lonchocarpus, 

 Mezoneuron, Milletia); Saxifrageae, (Ceratopetalum, Schizomeria); 

 Rhizophoreae, (Rhizophora); Myrtaceae, (Eucalyptus, Angophora); 

 Euphorbiaceae, (Baloghia); Casuarineae, (Gasuarina). 



The following yield useful soluble gums in fair abundance : — 

 Meliaceae, (Flindersia maculosa); Sapindaceae, (Atalaya hemi- 

 glauca); Leguminosae, (Acacia, chiefly the dry country species, 

 and Australia is no exception to the general rule which holds that 

 arid countries produce the best soluble gums). 



The following additional genera are most scientifically and 

 economically important as regards their latex, gums and resins, 

 and it would be a tempting field for a post-graduate course if the 

 University could see its way to reward its students for research 

 in regard to such of the exudations as have not been thoroughly 

 worked out : — Burseraceae, (Canarium Muelleri); Myrtaceae, 

 (Eucalyptus, Angophora, Syncarpia); Sapotaceae, (Sideroxylon); 

 Proteaceae, (Grevillea robusta); Urticese, (Ficus); Liliaceae, 

 (Xanthorrhcea); Coniferae, (Agathis, Araucaria; Callitris). 



Certain gums and resins (e.g., Leschenaultia, Triodia) are 

 laboriously collected and used by the aborigines ; it would be 

 desirable to endeavour to procure them in quantity. 



