THE LEAP BUD. 



45 



Plaited or plicate, each leaf folded like a fan ; vine, birch. 



Circinate, when each leaf is rolled or coiled downwards from the 

 apex, as in the sun-dew and ferns. 



Convolute, the leaf wholly rolled up from one of its sides, as in the 

 cherry. Involute, having both edges rolled inwards as in apple, violet 

 Revolutc,^''ni]l both margins rolled ,t^ gj 



outwards and backwards, as in the 

 dock, willow, rosemary. 



77 73 79 



VorDatiiin. 77, of bivch leaf ; 7S, of liliic, (iin!)ni;:ilv) ; 79, clieiry leaves, (convoluto) ; 80, duck 

 bud, (roYolute); 81, b.-iiui of Gilcad, (involute). 



214. The general vernation is loosely distinguished in descriptive 

 botany as valvate (edges meeting), and imbricate (edges 

 overlapping), terms to be noticed hereafter. The val- 

 vate more often occurs in plants with opposite leaves, 

 imbricated vernation is 



Equitant (riding astraddle), when conduplicate leaves 

 alteriiutely embrace — ^the outer oiu' the nc^ct inner, by 52. Veraation of Sy. 

 its unfolded margins, as in the privet and iris. camore bnd. 



Obvolute, or half-equitant, when the outer leaf, 

 embraces only one of the margins of the inner, 

 as in the sage. 



Triquetrous, where the bud is triangular in sec- 

 tion, and the leaves equitant at each angle, as in 

 the Carices. 



215. The principle of budding. Each leaf-bud 

 may be regarded as a distinct individual, capable of 

 vegetating either in its native position, or when 

 removed to another, as is extensively practiced in 

 the important operation of budding. 



216. BuLBLETS. In the tiger-lily, Ciciita bulbifera, 

 and Aspidium bulbiferum, the axillary buds spon- 

 taneously detach themselves, fall to the ground, and become new plants, 

 These remarkable little bodies are called bulhlets. 



84, Showing the process 

 of "budding." 



