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Project Name Data (Last Modified On 11/1/2012)
 

Flora Data (Last Modified On 11/1/2012)
Family PONTEDERIACEAE
Description Perennial bog or aquatic herbs with stems and entire leaves. Aerial leaves long-petioled. Stems sometimes reduced. Inflorescence with basal spathe, axillary from the rootstalk or stem; flowers spicate, paniculate or solitary, usually'con- spicuous, salverform or funnelform, zygomorphic or nearly regular. Calyx and corolla petaloid, marcescent, more or less united. Stamens 3-6, unequally adnate to the perianth tube. Ovary superior; style slender; terminal stigma 3- to 6-lobed or toothed. Fruit an achene or capsule.
Key a. Stamens 3; perianth nearly regular; flowers solitary or in a few- flowered lax spike; leaf blade relatively small, usually about 1-3 cm. broad - - _ - - 1. HETERANTHERA aa. Stamens 6; perianth zygomorphic; flowers usually many, in large dense spikes; leaf blade relatively large, usually about 4-9 cm. broad. b. Ovary with 3 fertile cells, ovules numerous in each cell; fruit a dehiscent capsule; flowers relatively large, about 3-6 cm. long; plants floating or more or less rooted and trailing-procumbent; leaves not cordate - - _ - _ - _ - 2. EICHHORNIA bb. Ovary with 1 fertile cell, ovule solitary; fruit achenoid; flowers smaller, about 1-2 cm. long; plants rooted, erect, or if trailing- procumbent; leaves more or less cordate or sagittate -3. PONTEDERIA
 
 
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