The tendril is one of the organs most used in determining species and varieties of grapes. In some species, as _V. Labrusca_, there is a tendril or an inflorescence opposite nearly every leaf, continuous tendrils. All other species have two leaves with a tendril opposite each and a third leaf without a tendril, intermittent tendrils. To study this organ it is necessary to have vigorous, healthy, typical canes. Tendrils may be long or short, stout or slender; simple, bifurcated or trifurcated; or smooth, pubescent or warty. The number of inflorescences borne by species is an important character in some cases. All species, excepting _V. Labrusca_, average two inflorescences to a cane, but _V. Labrusca_ may bear from three to six inflorescences, each in the place of a tendril opposite the leaf. _The bud._ _Bud_: An undeveloped shoot. _Fruit-bud_: A bud in which a shoot bearing flowers originates. _Wood-bud_: A bud in which a shoot bearing only leaves originates. _Latent bud_: A bud which remains dormant for one or more seasons. _Adventitious bud_: A bud arising elsewhere than the normal position at a node. _Eye_: A compound bud. _Main bud_: The central bud of an eye. _Secondary bud_: The lateral bud of an eye. Buds of different species of grapes vary greatly in time of opening as they do somewhat in varieties, so that the time the buds begin to swell is a fine mark of distinction. The angle at which the bud stands out from the branch is of some value in determining species. Differences in color, size, shape, position and amount of pubescence of buds must all be noted in describing grapes. The scales of the buds vary more or less in size and in thickness. _The flower._ _Staminate_: Having stamens and not pistils; a male flower. _Pistillate_: Having pistils and not stamens; a female flower. _Dioecious_: Said when the stamens are on one plant and the pistils on another. _Polygamous_: Said when flowers on a plant are in part perfect (having both stamens and pistils) while others are staminate or pistillate. _Hermaphrodite_: Said of a flower having both stamens and pistils. _Fertile_: Said of a flower capable of bearing seed without pollen from another flower. _Sterile_: Said of a flower without or with abortive pistils. _Perfect_: Said of a flower having both stamens and pistils. _Imperfect_: Said of a flower wanting either stamens or pistils. _Peduncle_: The stalk of a flower-cluster. _Pedicel_: The stalk of each particular flower.