PLEAT-LEAF KNOTWEED
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| File Size: 52 KB |
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Polygonum tenue Michx.
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| Saline County, Kansas |
| Annual |
| Height: 2-20 inches |
| Family: Polygonaceae - Buckwheat Family |
| Flowering Period: July, August, September,October |
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| Also Called: | | Slim knotweed. | | Stems: | | Erect, simple or branched, glabrous or slightly rough with minute pimple-like projections. | | Leaves: | | Cauline, alternate; ocrea 1/4 to 3/5 inch, lower part cylindric, upper part soon disintegrating into few brown fibers; petiole short; blade with 1 pleat on each side and parallel to midrib, green to grayish green, narrowly lanceolate to linear, 1 to 1.6 inch long, 1/25 to 1/3 inch wide, margins entire, tip mucronate or cuspidate. | | Inflorescences: | | Spike-like, cymes, axillary and terminal, 1-2(-3)-flowered. | | Flowers: | | Bisexual, closed; pedicels erect, 1/25 to 1/16 inch; perianth 1/10 to 1/6 inch; tube comprising 15 to 25% of perianth length; tepals 5, green with pink or white margins, elliptic; stamens 8. | | Fruits: | | Achenes black, elliptic to oblong, 1/10 to 1/6 inch, shiny, smooth or minutely striate-papillose near edges and apex; seed 1. | | Habitat: | | Sand prairies, sandy to rocky tallgrass prairies, glades, oak-hickory woodlands | | Distribution: | | East 1/2 of Kansas | | Origin: | | Native |
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| Pleat-leaf knotweed |  | | 29 KB | | McPherson County, Kansas |
| | Pleat-leaf knotweed |  | | 138 KB | | Saline County, Kansas |
| | Pleat-leaf knotweed flowers |  | | 45 KB | | Saline County, Kansas |
| | Pleat-leaf knotweed |  | | 117 KB | | Saline County, Kansas |
| | Pleat-leaf knotweed achene |  | | 37 KB | | McPherson County, Kansas |
| | Pleat-leaf knotweed |  | | 38 KB | | McPherson County, Kansas |
| | Pleat-leaf knotweed leaf |  | | 42 KB | | McPherson County, Kansas |
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