. The natural history of plants. Botany. 108 NATURAL EISTOBT OF PLANTS. Symenaa {Trachylobimn) verrucosa. or more pairs of unsymmetrical leaflets, and caducous ill-developed stipules. The flowers form usually terminal shortly pedicellate racemes, simple or branched. HymencBd}^ has the floral symmetry of Schotia or Humboldtia. Its coriaceous obconical receptacle, lined by a thick disk, bears four slightly imbricate sepals, five subequal imbricate petals, and ten free perigynous stamens, five alternate with the petals, and five shorter superposed to them. The gynaeceum, inserted laterally at ,a
. The natural history of plants. Botany. 108 NATURAL EISTOBT OF PLANTS. Symenaa {Trachylobimn) verrucosa. or more pairs of unsymmetrical leaflets, and caducous ill-developed stipules. The flowers form usually terminal shortly pedicellate racemes, simple or branched. HymencBd}^ has the floral symmetry of Schotia or Humboldtia. Its coriaceous obconical receptacle, lined by a thick disk, bears four slightly imbricate sepals, five subequal imbricate petals, and ten free perigynous stamens, five alternate with the petals, and five shorter superposed to them. The gynaeceum, inserted laterally at ,a variable distance from the bottom of the receptacle, is stipitate, with an ovary containing a few anatropous descending ovules, and bearing a style which is at first folded on itself and ends in a little stigma- tiferous head. The fruit is obliquely obovate or oblong, flattened or terete, thick coriaceous nearly woody, and indehiscent. It contains a variable number of seeds with very hard coats and a thick fleshy exalbuminous embryo. They are completely surrounded by a sort of dried up floury pulp.^ Hymenaa venosd and verrucosa,* natives of tropical America and East Africa respectively, have been made the types of the genera Peltogyne' and Trachy- lobimn,^ which we think we may retain as sections of the genus Hymemea. The former has the stigma more dilated than in Hymenosa proper, and a com- pressed bivalve fruit whose dorsal suture is often, though not constantly, prolonged into a narrow wing. The latter has the two anterior petals ru- dimentary and its ovary is borne on a foot dilated at the top into a little fringed collar. Its fruit, indehiscent and often one-seeded, is covered with warts (fig. 84).. Fi&. 84. Fruit. ' SymeruBa L., Gen., n. 512.—J., Q-en., 351. —GjEETN., Fi-uct., ii. 305, t. 139,145.—Lamk., Diet., ii. 147 ; Suppl., ii. 374; III., t. 330.— DC, Frodr., ii. 511.—Hatn., Arzneig., t. 6-19. —Spach, Suit, a Bvffon, i. 122.—Ekdi., Gen., n. 6788.—
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1871
