Page:Manual of the New Zealand Flora.djvu/234

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Prostrate herbs. Stems long, slender, rooting at the nodes, often matted. Leaves orbicular or reniform, deeply cordate or peltate, palmately toothed or lobed or divided, rarely entire, long-petioled; stipules small, scarious. Umbels simple, small; involucral leaves usually inconspicuous or wanting. Flowers small, sometimes unisexual. Calyx-teeth minute or obsolete. Petals entire, valvate or imbricate. Fruit laterally compressed, with a narrow commissure; carpels flat, placed edge to edge, with 1 or more prominent ribs on each face; vittæ wanting. Seed straight, laterally compressed.