143. Correspondingly in the lower row, of palmately veined leaves, the first is _palmately lobed_, the second _palmately cleft_, the third _palmately parted_, the fourth _palmately divided_. Or, in other language of the same meaning (but now less commonly employed), they are said to be _digitately lobed_, _cleft_, _parted_, or _divided_. 144. The number of the divisions or lobes may come into the phrase. Thus in the four last named figures the leaves are respectively _palmately three-lobed_, _three-cleft_ (or _trifid_), _three-parted_, _three-divided_, or better (in Latin form), _trisected_. And so for higher numbers, as _five-lobed_, _five-cleft_, etc., up to _many-lobed_, _many-cleft_ or _multifid_, etc. The same mode of expression may be used for pinnately lobed leaves, as _pinnately 7-lobed_, _-cleft_, _-parted_, etc. 145. The divisions, lobes, etc., may themselves be _entire_ (without teeth or notches), or _serrate_, or otherwise toothed or incised; or lobed, cleft, parted, etc.: in the latter cases making _twice pinnatifid_, _twice palmately_ or _pinnately lobed_, _parted_, or _divided_ leaves, etc. From these illustrations one will perceive how the botanist, in two or three words, may describe any one of the almost endlessly diversified shapes of leaves, so as to give a clear and definite idea of it. 146. =Compound Leaves.= A compound leaf is one which has its blade in entirely separate parts, each usually with a stalklet of its own; and the stalklet is often _jointed_ (or _articulated_) with the main leaf-stalk, just as this is jointed with the stem. When this is the case, there is no doubt that the leaf is compound. But when the pieces have no stalklets, and are not jointed with the main leaf-stalk, it may be considered either as a divided simple leaf, or a compound leaf, according to the circumstances. This is a matter of names where all intermediate forms may be expected. 147. While the pieces or projecting parts of a simple leaf-blade are called _Lobes_, or in deeply cut leaves, etc., _Segments_, or _Divisions_, the separate pieces or blades of a compound leaf are called LEAFLETS. 148. Compound leaves are of two principal kinds, namely, the _Pinnate_ and the _Palmate_; answering to the two modes of veining in reticulated leaves, and to the two sorts of lobed or divided leaves (141). [Illustration: Fig. 156-158. Pinnate leaves, the first with an odd leaflet (_odd-pinnate_); the second with a tendril in place of uppermost leaflets; the third _abruptly pinnate_, or of even pairs.] 149. _Pinnate_ leaves are those in which the leaflets are arranged on the sides of a main leaf-stalk; as in Fig. 156-158. They answer to the _feather-veined_ (i. e. _pinnately-veined_) simple leaf; as will be seen at once on comparing the forms. The _leaflets_ of the former answer to the _lobes_ or _divisions_ of the latter; and the continuation of the petiole, along which the leaflets are arranged, answers to the midrib of the simple leaf.