2. Æ. flàva, Ait. (SWEET BUCKEYE.) _Stamens included_ in the yellow corolla; _calyx oblong-campanulate_; leaflets 5, sometimes 7, glabrous, or often minutely downy underneath.--Rich woods, Va. to Ohio, Mo., and southward. May. A large tree or a shrub. Var. purpuráscens, Gray. Calyx and corolla tinged with flesh-color or dull purple; leaflets commonly downy beneath.--From W. Va., south and westward. 3. Æ. Pàvia, L. (RED BUCKEYE.) Stamens not longer than the corolla, which is bright red, as well as the _tubular calyx_; leaflets glabrous or soft-downy beneath.--Fertile valleys, Va., Ky., Mo., and southward. May. A shrub or small tree. 2. SAPÌNDUS, L. SOAP-BERRY. Flowers regular, polygamous. Sepals 4--5, imbricated in 2 rows. Petals 4--5, with a scale at the base. Stamens 8--10, upon the hypogynous disk. Ovary 3-celled, with an ascending ovule in each cell. Fruit a globose or 2--3-lobed berry, 1--3-seeded. Seed crustaceous, globose.--Trees or shrubs, with alternate abruptly pinnate leaves, and small flowers in terminal or axillary racemes or panicles. (Name a contraction of _Sapo Indicus, Indian soap_, having reference to the saponaceous character of the berries.) 1. S. acuminàtus, Raf. A tree 20--60° high; leaflets 4--9 pairs, obliquely lanceolate, sharply acuminate, entire, 1½--3´ long; the rhachis of the leaf not winged; flowers white, in a large panicle, fruit mostly globose, 6´´ broad. (S. marginatus of authors, not _Willd._)--S. Kan. to La., Fla., and Mex. 3. ÀCER, Tourn. MAPLE. Flowers polygamo-diœcious. Calyx colored, 5- (rarely 4--12-) lobed or parted. Petals either none or as many as the lobes of the calyx, equal, with short claws if any, inserted on the margin of the lobed disk, which is either perigynous or hypogynous. Stamens 3--12. Ovary 2-celled, with a pair of ovules in each cell; styles 2, long and slender, united only below, stigmatic down the inside. From the back of each carpel grows a wing, converting the fruit into two 1-seeded, at length separable samaras or keys. Embryo variously coiled or folded, with large and thin cotyledons.--Trees, or sometimes shrubs, with opposite palmately-lobed leaves, and small flowers. Pedicels not jointed. (The classical name, from the Celtic _ac_, hard.) [*] _Flowers in terminal racemes, greenish, appearing after the leaves; stamens 6--8._ 1. A. Pennsylvánicum, L. (STRIPED MAPLE.) Leaves 3-lobed at the apex, finely and sharply doubly serrate, the short lobes taper-pointed and also serrate; _racemes drooping, loose; petals obovate_; fruit with large diverging wings.--Rich woods, Maine to Minn., and southward to Va., Ky., and Mo. June.--A small and slender tree, with light-green bark striped with dark lines, and greenish flowers and fruit. Also called _Striped Dogwood_ and _Moose-Wood_.