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deciduous, basal and/or cauline, usually alternate, rarely opposite, simple or compound (palmate or imparipinnate); stipules usually present, sometimes absent;

Dudleya, Echeveria, Graptopetalum); stipules absent; petiole usually absent; blade margins usually entire, sometimes toothed or lobed. Inflorescences terminal

A. Gray P. patagonica var. spinulosa (Decaisne) A. Gray P. purshii var. oblonga (E. Morris) Shinners P. spinulosa Decaisne Treatment appears in FNA Volume

at base of mother frond; turions present in some species. Inflorescences usually solitary (mostly 2 per frond for L. perpusilla). Flowers mostly bisexual

lingulata Lemna gibba Wolffia brasiliensis Lemna aequinoctialis Wolffiella oblonga Wolffia globosa John Myers John Myers John Myers John Myers John Myers John

lingulata Lemna gibba Wolffia brasiliensis Lemna aequinoctialis Wolffiella oblonga Wolffia globosa John Myers John Myers John Myers John Myers John Myers John

becoming stranded > 7 5 Sepals usually 3, 1-1.5 mm, apex attenuate, apiculate; petals 0.5-1 mm. Crassula tillaea 5 Sepals usually 4 or 5, 0.5-2 mm, apex acute

15–45 mm diam.; hypanthium campanulate or cupular, 3–5 mm diam., interior usually pubescent, exterior hairy or glabrous; sepals 5, reflexed, lanceolate or