rilp] LEAF 



97 



124-12(>. IMiinate leaves: the first Avitli an orM leaflet 

 {odd-pinnate) ; the secuml with a tendril in 

 place of uppermost leaflets ; the third abruptly 

 pinnate, or ol even pairs. 



179. Compound leaves are of two principal kinds, namel)', the 

 pinnate uiid the jiahinilc; answei'ing to the two modes of veininy in 

 reticulated leaves, and to the two sorts of lobed or divided leaves 

 (Figs. 110, 120). 



180. Pinnate leaves are those in which the leaflets are arranged on 

 the sides of a main 



leafstalk ; as in f\\ <^J>ay, 



Figs. 124-120. They ^^5^^ <F^y^ 



answer to \\\e feat lie r- \S\l/^J ^-^nt-'^ _ 



veined (i.e. pinnatel if- 

 reined) simple leaf; 

 as will be seen at 

 once on comparing 

 the forms. The lenj- 

 lets of the former 

 answer to the lohes 

 or divisions of the 

 latter; and tlie con- 

 tinuation of the peti- 

 ole, along which the 

 leaflets are arranged, 

 that is, the leaf rachis answers to tlie inidrili of the simple leaf. 



181. Three sorts of pinnate leaves are here giveii. Fig. 12-1 is piti- 

 iKite with an odd or end leaflet, as in the Common l.ociist and the Ash. 

 Fig. 12.5 is pinnate n:ith a tenJril at tlie end, in place of the odd leaflet, 

 as in the Vetches and the Pea. Fig. 120 is eveidy or (dirupthj pinnate, 

 as in the Honey Locust. 



182. Palmate (also named digitate) leaves are those in which the 

 leaflets are aU. borne on the tip of the leafstalk, as in the Lupine, 



the common Clover, the Virginia Creeper, 

 the Horse-chestnut and Buckeye (Fig. 127). 

 They evidently answer to the radiate veiried 

 or pahnatebj veined simple leaf. 



183. Either sort of compound leaf may 

 have any number of leaflets; yet palmate 

 leaves cannot well have a great many, since 

 they are all crowded together on tlie end 

 of the main leafstalk. Some Lupines have 

 nine or eleven; tlie Horse-chestnut has 

 seven, the Sweet Buckeye mure commonly 

 five, tlie Clover three. A pinnate leaf often 

 has only seven or five leaflets, or only three, 

 as in the Beans of tin.' genus Phaseolus, etc. ; in some rarer cases only 

 two; in the Oranges and Lemon and also in the common Barlierry 

 there is only one. The joint at the place where the leaflet is united 



OUT. OF UOT. — 7 



127. Falniatu (or di.;;itate) 

 leaf of five leaflets 

 of the Sweet Duck- 

 eye. 



