Show Lower Taxa
Difference between revisions of "Planera"
Syst. Nat. 2: 150. 1791.
Common names: Water-elm planer tree
Etymology: for Johann Jacob Planer, German botanist and physician, 1743-1789
Treatment appears in FNA Volume 3.
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Revision as of 17:13, 18 September 2019
Trees, to 12 m; crowns low, broad. Bark gray or light brown, scaly and flaky. Wood weak, brittle. Branches unarmed, spreading; twigs hirtellous when young, glabrate. Leaves: stipules falling early; petiole present. Leaf blade rhombic-ovate to ovate-oblong, base oblique to rounded or cuneate, margins unequally serrate, apex acute; venation pinnate. Inflorescences: staminate fascicles; pistillate solitary flowers or 2-3 together. Flowers normally unisexual, pedicellate, staminate and pistillate on same plants, a few bisexual flowers usually present; calyx deeply 4-5-lobed; stamens when present 4-5. Fruits nutlike, ellipsoid, with irregular, thickened ribs.
Distribution
North America (se United States).
Discussion
Species 1 (1 in the flora).