It occasionally happens that an adventitious bud arises from the axil of a monocarpellary pistil. This takes place sometimes in _Leguminosae_, and seems to have been more frequently met with in _Trifolium repens_ than in other plants. The species named is, as is well known, particularly subject to a reversion of the outer whorls of the flower to leaves, and even to a leaf-like condition of the pistil. There are on record instances wherein a leaf-bud has been placed in the axil of a more or less leaf-like carpel; while at other times a second imperfect carpel has been met with in the axil of the first.[140] I have myself seen numerous imperfectly developed cases of this kind. It may be asked whether such cases are not more properly referable to central prolification--whether the axis is not in such flowers terminated by two, rather than by one carpel? It is, however, generally admitted by morphologists that the solitary carpel of _Leguminosae_ is not terminal, but is the sole existing member of a whorl of carpels, all the other members of which are suppressed as a general rule, though exceptional instances of the presence of two and even of five carpels have been described.[141] Again, the adventitious bud or carpel is placed, not laterally to the primary one, or opposite to it, on the same level, but slightly higher up--in fact, in the axil of the primary carpellary leaf. Griffith figures and describes[142] an instance of the kind in a species of _Melilotus_. The stalk of the ovary is mentioned as having a sheathing base, bearing in its axil a prolongation of the axis of inflorescence, in the form of a short spike with hairy bracts and imperfect flowers, the latter having a well-formed calyx and rudimentary petals and stamens. Griffith infers, from this specimen, that the legume is not to be considered as a terminal leaf. _List of Genera in which Axillary Prolification has been observed._ Order Genus. Leaf-bud Flower-bud or From what organ. or Branch Inflorescence