PLOT B 63 



leguminous plant, Medicago lupulina, is worn instead in 

 Dublin (see " Ulster Journal of Archaeology," v. pp. 12-20). 

 The emblem has often been stated to be represented by 

 Trifoliuni repens. The pleasant acid taste is due to acid 

 potassium oxalate, once a flavouring for Oxford beer. 



Tribe Balsamineae, The Touch-me-not, Tmpatiens noli- 

 me-tangere, and other species have explosive fruits which, when 

 ripe, open at a touch. 



Ord. 4o. Included among the Geraniaceae by some 

 botanists are the Tropaeolaceae, commonly, though wrongly, 

 named Nasturtiums, which were introduced into our gardens 

 from Peru in 1686. Tropaeolum majus is the classical in- 

 stance of a flower round which has been seen a " lightning- 

 like phosphorescence " on a sultry summer evening. 



Ord. 41. RUTACEAE, or Rues, are well known to herbalists 

 on account of their essential oil, and their antispasmodic, 

 febrifuge, and tonic properties. Common Rue is Ruta 

 graveolens, and Dittany, Dictamnus fraxinella^ which on a 

 still, dry, warm summer evening emits an inflammable vapour 

 which can be kindled with a match without injury to the 

 flowers, as originally described by the daughter of Linnaeus 

 in 1762, and as Mr. Hatchett Jackson has shown me in the 

 gardens of Keble College. Related and sometimes included 

 in this order is the 



Order of AURANTIACEAE, Oranges and Lemons. The largest is the 

 Shaddock, Citrus decumana, in No. 12 Green-house. 



Ord. 42. SIMARUBEAE. The Quassias are noted for their intense 

 bitterness. They are represented in the Garden by the "Tree of 

 Heaven," Ailanthus glandtdosa, in Plot D. 



Ord. 43. OCHNACEAE. Lophira alata yields " Meni " oil and 

 "African Oak" wood. 



Ord. 44. BURSERACEAE. The Myrrh Family is noted for its yield 

 of balsams, frankincense, and myrrh. Hedwegia boswelli is resin-bearing. 



Ord. 45. MELIACEAE. An order of tropical trees and shrubs, including 

 the Indian Neem-tree, Melia azadirachta ; the Central American Ma- 

 hogany, Swietenia mahagoni ; " Cedar " wood from India and Australia, 

 Cedrela toona ; Satin wood from Ceylon, Chloroxylon swietenia. 



