SYNOPSIS. 



321 



Alliance 28. Bignoniales. 

 Ord. 66. Bignoniacese. 3 ; 4 ; 0. 

 67. Schrophulariaceae. 3; 3; 0. 

 Gen. 3 ; sp. 7. 



Alliance 29. Oampanales. 

 Ord. 68. Asteracese. 2 ; 3; 0. 

 Compositce. 

 - Gen. 2 ; sp. 3. 



Alliance 30. Myrtales. 

 Ord. 69. AlangeacesB. 1 ; 4 ; 0. 

 70. Myrtaceee. 2 ; 2 ; 7. 

 Gen. 3 ; sp. 6 ; v. 7. 



Alliance 31. Grossales. 

 Ord. 71. Grossulariacese. 1 ; 45 ; 

 37. 



72. Escalloniacese. 2 ; 5 ; 8. 



73. Philadelphacese. 3; 15; 16, 

 Gen. 6 ; sp. 65 ; v. 41. 



Alliance 32. Oinohonales. 

 Ord. 74. Vacciniacea?. 2 ; 25 ; 10. 

 75. Caprifoliacese. 8; 60; 27 

 Lonicercce. 

 8ambiice.cE. 

 Gen. 10 ; sp. 95 ; v. 37. 



Alliance 33. Umb ell ales. 

 Ord. 76. Apiaceas. 1 ; 2 ; 0. 



77. Araliacete. 2 ; 8 ; 8. 



78. Oornacese. 3 ; 3 ; 2. 



79. HamarnelidacesB. 2; 2; 4. 

 Gen. 8 ; sp. 15 ; v. 14. 



Alliance 34. Asaralks. 

 Ord. 80. Santalaceas. 1; 1; 0. 



81. Loranthacese. 1; 1; 0. 



82. Aristolochiaceae. 1; 2; 0. 

 Gen. 3 ; sp. 4. 



Note. — The extent to which the varieties of plants 

 and trees in the arboretum may be carried is to be 

 measurably governed by the locality. Liberal as the 

 foregoing list may appear, it can be largely and profit- 

 ably extended by selections from onr American forests, 

 while some of the trees and plants named should be ex- 

 cluded, from their unsuitableness to the climate. — Ed. 



A careful inspection of the preceding synopsis will 

 suggest most of the scientific principles on which the 

 arrangement of an arboretum must proceed. It will 

 be understood that the individual species of plants 

 unite to form genera, the lowest but most perfect com- 

 binations of vegetables that exist in nature. It will 

 also be perceived that cognate genera coalesce into 

 orders, which are the next important aggregations ; 

 and these orders, by a highly refined analysis and 



