1372 ARBORETUM AND FRUTICETUM. PART III, 



from a bud peculiar to it ; the flowers of the group situated each upon a 

 peduncle, or each upon a pedicel, and disposed a few together upon short 

 peduncles, or situated in both modes. Flowers bisexual, or a few of them 

 male : both kinds upon one plant. Calyx reddish, distinct from the ovary, 

 top-shaped, or bell-shaped, of one piece, but having 5 or 4 8 segments, which 

 are imbricate in asstivation; remaining until the fruit falls. Stamens as 

 many as the segments ; inserted into the lower part of the calyx, oppositely 

 to the segments, and prominent beyond them : anthers opening lengthwise, 

 outwardly (Smith), inwardly (T. Nees ab Esenbeck). Ovary elliptic- 

 oblong, compressed, cloven at the summit, having two cells and a pendulous 

 ovule'in each. Style very short, or there is not one. Stigmas 2, acuminate, 

 villous on the inner face. Fruit a samara, and this compressed, more or 

 less round or oval, and having the wing-like part membranous, broad, and 

 present all round, except in a notch, whose base is the place of the attach- 

 ment of the stigmas. Seed : 1 in a samara, pendulous : in many instances, 

 it is not perfected. Embryo not attended by albumen, straight, its radicle 

 uppermost. Species several : wild in Europe, North America, and India; 

 one or more in Asia, one in China. Trees : some of the species attaining 

 great size and age. Bark rugged. Wood hard. Branches twiggy. Flowers 

 small. Leaves alternate, in 2 ranks, feather-veined ; in most, unequal at 

 the base, annual, serrate, and harsh to the touch. Stipules oblong, 

 deciduous. Leaves within the bud folded lengthwise, in 2 portions, 

 upright, with scales between leaf and leaf. (T. Nees ab Esenbeck, Gen. 

 PI. Fl. Germ. ; Smith, Engl. Flor. ; Duby et Decand. Bot. Gallic. ; and 

 observations.) 



PLA'NEIU Gmelin. Sexes polygamous, or each in a distinct flower ; in each 

 case, upon the same plant. Female and bisexual flowers. Calyx bell-shaped, 

 distinct from the ovary, membranous, green, of one piece, but having 5ciliate 

 lobes. Stamens, in the bisexual flower, 4 5 less developed than those in the 

 male flower. Ovary top-shaped, villous. Stigmas 2, sessile, diverging, white, 

 pimpled. Fruit roundish, gibbous, pointed, dry, 2-celled, each cell contain- 

 ing 1 seed. Male flower. Calyx as in the female and bisexual flowers. 

 Stamens 4 5, inserted near the centre of the bottom of the calyx, and 

 oppositely to its lobes. Anthers reaching a little beyond the lobes of the 

 calyx, borne outwardly to the filament, of 2 lobes that seem as 4, and 2 cells 

 that open sidewise and lengthwise. In P. Gmelin/ the fruits are in heads; 

 and in P. Richard/ nearly solitary. Species 2 ? 3. Trees: natives of 

 Asia and North America. Leaves alternate and more or less ovate and 

 toothed ; feather-veined and annual ; and the flowers small, and not showy. 

 P. Richard/ has stipules : which are straight, pointed, villous, and soon fall 

 off. This species has united by ingrafting with the elm. (Turpin and 

 Michaux. ) 



C'E'LTIS Tourn. Flowers borne upon the shoots of the year, axillary; either 

 solitary, or 2 3 together, each, in any case, upon a peduncle ; or from 2 to 

 many, in a raceme or panicle : in the kinds hardy in Britain, the flowers 

 are protruded just previously to the leaves to which they, or the fruits, are 

 afterwards axillary : bisexual, or, less commonly, by the imperfection of 

 the pistil, only male in effect ; both kinds upon one plant, and when they 

 occur in the same raceme, the latter are the lower. Calyx bell-shaped, 

 distinct from the ovary, 5 6-parted, the segments imbricate in aestivation. 

 Stamens 5 6, inserted into the base of the calyx, oppositely to its lobes, 

 and they are shorter than the lobes. Filaments at first incurved. Anthers 

 cordate-acuminate; the cells 2, opening at the sides. Ovary ovate, 1 -celled. 

 Stigmas 2, sessile, acuminate, long, spreading or recurved, downy or 

 glanded, simple or 2-parted. Fruit a drupe, subglobose. Ovule and seed, 

 each l,and pendulous. Embryo sickle-shaped, its radicle uppermost: traces 

 of subgelatinous albumen are between the cotyledons. Species 19 or more ; 

 1 wild in Europe, the north of Africa, and Iberia; in the Levant ; and 2 in 

 China; 4 in North America; some in the West Indies and South America; 



