520 CONSERVATIVE ORGANS. [LECT. X 



&c. It is quadrinate (quadrinatum), when there 

 are four leaflets, as in Marsilea quadrifolia, 83, 

 and some of the Hedysarums: quinate (quinatum), 

 when there are five, as in ^Esculus Pavia, 84; 

 digitate or fingered (digitatum), 85, when there 

 are seven, as in several of the Potentillas ; and 

 multifoliolatum when the number exceeds seven; 

 or umbellatum, 86, when being numerous they 

 are so arranged as to form the figure of a parasol, 

 as exemplified in many of the Lupine tribe. 



When the leaflets, instead of being supported 

 on the very apex of the petiole, are attached on 

 its sides, the leaf is termed yoked and pinnate. It 

 is termed simply yoked (conjugatum}, when one 

 pair only of opposite leaflets is supported on a 

 common footstalk, as in the genus Zygophyllum, 

 87, (p. 521), which is named from this character of 

 the leaves : and bijugum, when there are two pairs. 

 But the terms bijugum, trijugum, quadrijugum, 

 quinquejugum, and multijugum, are not employed, 

 except to denote the particular number of opposite 

 leaflets on a common footstalk, when such an 

 enumeration is requisite for establishing specific 

 characters; otherwise all compound leaves having 

 more than one pair of opposite leaflets attached 

 along the side of a common petiole, are, usually, 

 regarded as pinnate (plnnata). The individual 

 leaflets are termed pinncc; and according to the 



