34 



PART I. ORGANOGRAPHY. 



irregularly and rather deeply cut, as if cut with a knife. The 

 peculiar form of pinnately-incised leaf observed in the Dande- 

 lion and some other Composite, Fig. 103, in which the teeth 

 are recurved, is called runcinate. The lobed is one in which the 

 indentations extend nearly half way to the mid-rib or base, and 

 in which either the segments or sinuses, or both, are rounded 

 as in the leaves of some Oaks, Fig. 104; the cleft is the same as 

 lobed, except that the sinuses are deeper and commonly acute, 

 Fig. 105; the parted is one in which the incisions, of whatever 

 form, extend nearly but not quite to the mid-rib, as in the leaf 

 of the Poppy, Fig. 106; and the divided is one in which the 

 incisions extend quite to the mid-rib, but the segments are 

 unstalked, as in the leaf of the Cress, Fig. 107. 



It is evident that if the venation is pinnate, the series of forms 

 may be described as pinnately-incised, -lobed, -cleft, -parted or 

 -divided, as in the series of figures from 103 to 107 inclusive. If, 

 however, the venation is radiate, as in the series of figures from 

 108 to 112 inclusive, they will be described as radiately or pal- 

 mately-incised, -lobed, etc. 



v^ 



Fig. 108. 



Fig. 109. 



Fig. iio. 



Fig. hi. 



Fig. 



Figs. 108 to 112 inclusive, diagrams illustrating the palmately-veined leaves with 

 deep marginal indentations ; 108, palmately-incised : 109, palmately-lobed ; no, palmately- 

 clsft; in, palmately-parted, and 112, palmately-divided. 



The terms pinnatilobate, pinnatifid, pinnatipartite and pin- 

 natisect are used' synonymously with pinnately-lobed, pinnately- 

 cleft, pinnately-parted and pinnately-divided, respectively. The 

 corresponding terms descriptive of the radiate or palmate forms 

 are palmatilobate, palmatifid, palmatipartite and pahnatisect. 



The number of lobes, segments or divisions may be indicated 

 by appropriate numerical prefixes, thus: Bilobate, trilobate, multi 

 lobate ; bifid, trifid, multifid ; bipartite, tripartite, multipartite ; 

 bisect, trisect, multisect, etc.; and in case it is desired at the same 



