The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 SECTION 7.] ORDINARY LEAVES. 59 becomes thrice pinnate, or tripinnate, as in many Acacias. The first, divi- sions are called Pinna; the others, Pinnules; and the lust, or little blades themselves, Leaflets, ] 55. So the palmate leal', if again compounded in the same way, be- comes twice palmate) or, as we sav when the divisions are ill threes, twice ternate (in Latin form biter- nate) ; if a third time compounded, thrice ternate or triternate. Hut if the division goes still furthe
The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 SECTION 7.] ORDINARY LEAVES. 59 becomes thrice pinnate, or tripinnate, as in many Acacias. The first, divi- sions are called Pinna; the others, Pinnules; and the lust, or little blades themselves, Leaflets, ] 55. So the palmate leal', if again compounded in the same way, be- comes twice palmate) or, as we sav when the divisions are ill threes, twice ternate (in Latin form biter- nate) ; if a third time compounded, thrice ternate or triternate. Hut if the division goes still further, or if the degree is variable, we simply say that the leaf is decom- pound ; either palmately or pin- nately decompound, as the case may be. Thus, Fig. 161 repre- sents a four times ternately com- pound (in other words a ternately decompound) leaf of a common Meadow Hue. 156. When the botanist, in de- scribing leaves, wishes to express the number of the leaflets, he may use terms like these : — Unifoliolate, for a compound leaf of a single leaflet; from the Latin unum, one, and foliolum, leaflet. Bifoliolate, of two leaflets, from the Latin bis, twice, andfoliolum, leaflet. Trifoliolate (or ternate), of three leaf- lets, as the Clover; and so on. Palmate!;/ bifoliolate, trifoliolate, quadrifoliate, plurifoliolate (of several leaflets), etc. : or else Pinnately bi-, tri-s quadri-, or pluri- foliolate (that is, of two, three, four, five, or several leaflets), as the case may be: Ihesc are terse ways of de- noting in single phrases both the num- ber of leaflets and the kind of eom- pounding. L57« Of foliage-leaves having certain peculiarities in structure, the following may be noted : —
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