Naturalisation in Extra- Tropical Countries. 489 



Trigronella suavissima, Lindley. 



Interior of Australia from the Murray-River and its tributaries 

 to the vicinity of Shark-Bay. This perennial, fragrant, clover-like 

 plant proved a good pasture-herb. It was used as a spinage dur- 

 ing Sir Thomas Mitchell's expedition. A lithogram, illustrating 

 this plant, occurs in the work on the " Plants indigenous to Vic- 

 toria." Some of the many European, Asiatic and African species 

 of this genus deserve local pastoral tests. 



Trillium erectum, Linne. 



" The Birthroot." Eastern North- America. This liliaceous plant 

 has found its way into the materia medica. 



Triodia exigna, Th. Kirk. 



South-Island of New Zealand, at 1,200 to 3,000 feet elevation, 

 Forms naturally almost even plots, often many square-yards in 

 extent ; the leaves are hard, short and shining ; the compact growth 

 of the turf or sward prevents weeds and other grasses to encroach. 

 It is particularly to be recommended for croquet-lawns, never 

 requiring mowing [Prof. Th. Kirk]. Should prove especially 

 valuable in colder countries for lawns, and may hold its ground 

 also in hotter climes through some irrigation. Likely of use also 

 for edgings in gardens. 



Triphasia Aurantiola, Loureiro. 



South-Eastern Asia. This shrub is worth cultivation for the 

 exquisite fragrance of its flowers. The fruits, though small, are of 

 pleasant sweetness ; they should prove good for preserves. The 

 plant may also prove well adapted for hedges. Glycosmis citri- 

 folia (Lindley) and Claussena punctata (Oliver), also East- Asiatic 

 fruit-shrubs, may possibly show themselves hardy in sheltered 

 forest-regions of warm temperate climes. 



Tripsacum dactyloides. Linne. 



Central and Northern America ; known popularly as a Gama- 

 grass. A reedy perennial grass, more ornamental than utilitarian. 

 It is the original Buffalo-grass, and attains a height of seven feet, 

 assuming the aspect of maize. It seems of inferior value for feed, 

 but serves for binding sand. Prof. C. Mohr however regards it as 

 a valuable fodder-grass. The seeds are available for food. Howard, 

 speaking in Carolina of this grass, contends, that it may be cut 

 three or four times in a season, that it makes a coarse but nutritious 

 hay, and that the quantity of forage, which can be made from it, is 

 enormous ; cattle and horses are fond of it, and the hay can be 

 harvested easily. 



