GREATER DUCKMEAL
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| File Size: 181 KB |
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Spirodela polyrhiza (L. ) Schleid.
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| Ottawa County, Kansas |
| Perennial |
| Height: Plants aquatic, sometimes stranded on mud |
| Family: Araceae - Arum Family |
| Flowering Period: July, August, September |
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| Stems: | | Stems absent. Roots 7-21 per thallus, to 1.2 inch. | | Leaves: | | Leaves not clearly differentiated. Thallus usually asymmetric, somewhat discoid, flat or slighlty convex on lower surface, obovate to nearly round, 1/8 to 2/5 inch long, 1/10 to 1/3 inch wide, veins 7-16(-21). | | Inflorescences: | | Inflorescences highly reduced and consisting of 1-2 staminate and 1 pistillate flowers sometimes subtended by a tiny membranous sheath, rarely produced in nature in some species, plants reproducing mosty asexually through formation of plantlets in pouches along margins of tallus. | | Flowers: | | Flowers seldom observed, unisexual, 1(-2) per thallus; sepals absent, petals absent; stamens 2; pistil 1. | | Fruits: | | Utricles; seeds 1-3, longitudinally ribbed. | | Habitat: | | Ponds and lakes, marshes, backwater areas along rivers and streams, springs and spring runs | | Distribution: | | Occurs statewide | | Origin: | | Native | | Comments: | | Flowering rarely in Kansas, July to September elsewhere. | | | | Spirodela, cord and evident, alluding to the root, and polyrhiza, many and root. |
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| Greater duckmeal |  | | 176 KB | | Ottawa County, Kansas |
| | Greater duckmeal |  | | 166 KB | | Ottawa County, Kansas |
| | Greater duckmeal |  | | 132 KB | | Ottawa County, Kansas |
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