70 NOMENCLATURE OF THE LEAP. 



more leaflets. (F. 1G2.) Its varieties are denominated, 

 trifoliate, quadrinate, quinate, digitate, many-leaved, 

 umbellate, yoked, pinnate and vertebrated. 



a. Trifoliate or ternate when the leaves are sessile, attached to 

 the apex of the leaf-stalk, and three in number, as in the genus 

 clover. {F. 159.) 



b. Quadrinate when there are four leaflets, as in the marsilea 

 quadrifolia, (F. 160.) 



c. Quinate when there are five leaflets, as in the red-flowered 

 horse-chesnut. (F. 162.) 



d. Digitate when there are seven, as in several ofthepotentillas. 



e. Many-leaved when the number of leaflets exceed seven. 



f. Umbellate when being numerous, they are so arranged, as to 

 form a parasol, as in many of the lupins. 



g. Yoked when the leaflets, instead of being supported on the 

 very apex of the leaf-stalk, are attached to its sides. It is said to be 

 simply yoked, when one pair only of opposite leaflets, is supported 

 on the common foot-stalk, as in the genus zygophyllnm. (F. 163.) 

 Doubly-yoked when there are two pairs, and so ofc. 



h. Pinnate when several leaves proceed laterally from one foot- 

 stalk, instead of being supported at the top. The individual leaflets 

 are termed pinna, and according to the arrangement of these on the 

 leaf-stalk, pinnate leaves receive different appellations, as 



Abruptly-pinnate without either a terminal leaflet or a ten- 

 dril, as in the genus mimosa. (F. 164.) 



Impari-pinnate when it is pinnated with a terminal or soli- 

 tary leaflet at the apex of the leaf-stalk, as in roses. (F. 165.) 



Cirroso-pinnate when furnished with a tendril, in place of 

 an odd leaflet, as in the pea and vetch tribe. (F. 160.) 



Lyrato-pinnate in a lyrate manner, having the terminal leaflet 

 largest, and the rest gradually small eras they approach the base, 

 as in the erysimum pracox. 



Oppositely-pinnate- when the leaflets are in opposite pairs, 

 and it is not essential to enumerate them, as in saintfoil and 

 roses. (F. 164.) 



Alternately-pinnate when they are alternate, as in the great 

 wood-vetch. (F. 160.) 



Interruptedly-pinnate when the principal leaflets are ranged 

 alternately, with an intermediate series of sma'ler ones, as in the 

 drop-wort and meadowsweet. (F. 166.) 



