PLOT &$ 



tlie plot, alongside the shrubbery, grow plants of one of the 

 largest of the Natural Orders, which are characterised by the 

 shape of their fruit, known to botanists as a legume or pod, by 

 the butterfly-like shape of their flowers, and by the fact that 

 they alone of all plants live in happy association with fungi 

 which they house in swellings on their roots, and which in 

 return supply the plants with nitrogenous food, partly prepared 

 from the nitrogen of the air. The plant is thus able to flourish 

 in poor and exhausted soils. Included under this head are : 



Sub-ord. I. PAPILIONACEAE. 



Tribe i. Sophoreae. Represented in the Garden by the trees 

 of Sophora japonica (Plot F) and Cladrastis (Plot D). 

 ii. Podalyrieae. Baptisia tinctoria is the wild Indigo- 

 root of the United States, 

 iii. Genisteae. Cytisus, Gorse, and Lupins. 



An extraordinary graft-hybrid of Cytisus laburnum 

 receives special notice on p. 52. 

 iv. Trefoils and Clovers, 

 v. Loteae. Bird's-foot Trefoil. 



vi. Galegeae. The Indigo-plant of India, Indigofera 



tinctoria. The False Acacia, Robinia pseudacacia, is 



growing in Plot H : it is a common tree in 



Oxford gardens. 



vii. Hedysareae. Sainfoin, Onobrychis sativa ; Telegraph 



plant, Desmodium gyrans. 



viii. Vicieae. The Bean, Vidafaba ; Pea, Pisum sativum; 

 Sweet Pea, Lathyrus\ \^\\i\\Lensesculenta; Lathy rus 

 sibthorpii. 



ix. Phaseoleae. Runner Beans. P. multiflorus is the 

 Scarlet Runner Bean. Wistaria chinensis grows to 

 a large size on the western aspect of both East 

 and West Walls. Calabar Bean, Physostigma. 



x. Dalbergieae. Dalbergia latifolia yields the Rosewood of 

 S. India, and Pterocarpus species supply many other valuable 

 coloured woods well known in the Oriental region. 



