GEMMATION. 



447 



CHAP. XV. 



OF GEMMATION. 



GEMMATION is the construction of the gem or bud, which 

 is formed either of leaves, stipulce, petioles, or squama. Those 

 that are formed of the leaves will be considered in the next Chap- 

 ter, under the head of foliation ; the rest are distinguishable into, 



Petiolar buds, which are either, 



1. Opposite, as in Ligustrum,...Phtllyrea,...Nyctanthes,... 

 Syringa,.. .Hypericum,... CoriarIa,... Buxus,...Jasminum,... Vac- 

 cinium,... Arbutus,... Andromeda,... Ledum,. ,.Daphne ; ...Laurus, 



...MYRICA,...LlNNiEA,... DlERVlLLA, ... LoNlCERA,...EuONYMUS,... 



Fraxinus,...Acer,... Esculus,,.. Bignonia,... Opulus,... Sambu- 

 cus,...and Psidium j or, 



2. Alternate, as in Salix,. ..Spiraa,.,. Genista,. ..Solanum,... 

 Hippophae,...Berberis,...Ilex,...Ribes,...Juglans,...Pistachia, 

 ...and Plumbago. 



Stipulaceous buds, which are either, 



1. Opposite, as in Cephalanthus and Rhamnus Catharticus; 



or, 



2. Alternate, as in Populus,... Tilia,... Ulmus,... Quercus,... 

 Fagus,...Carpinus, ... Corylus, ... Betula,...Alnus, ... Ficus,... 

 and Morus. 



Stipulaceo-petiolar buds, which are, 



1. Alternate, as in Sorbus,. ...Crataegus,. ...Prunus,... .Mespi- 

 lus,.... Pyrus,.... Malus,....Cotoneaster,....Amygdalus,... Ce- 

 rasus,...Padus,.,.Melianthus,... Rosa,...Rubus,...Vitis,...Ro~ 

 binia,.,.Cytisu8,,. i Potentilla FRUTicosA,..,and Staphylea. 



