| Description | A short lived perennial or biennial. |
|---|---|
| Pronunciation | (sen-NEESH-shee-oh) |
| Plant Type | All Plants, Wild Flowers |
| Hardiness Zone | 3-9 |
| Sunlight | full |
| Moisture | average to dry |
| Soil & Site | dry upland prairies, sandy and gravely area. |
| Flowers | yellow, head up to 1" wide, 6-15 yellow ray flowers, found in a flat top cluster, biennial or a short lived perennial |
| Fruit | achenes mature, developing tufts of white hairs, for dispersed by the wind |
| Leaves | basal foliage, up to 3 inches long, 1 1/2" wide, long petiole and toothed or lobed, stem leaves are: few, smaller than basal leaves and mostly stalk less. |
| Stems | spreads by rhizomes, forms colonies |
| Roots | fibrous |
| Dimensions | up to 2 feet tall. |
| Misc Facts | The plants are poisonous to humans and live stalk, but have been used in folk medicines. The genus is named after John G. Packer, a Canadian biosystematist and the species name refers to the Platte River area. (syn Pachera platternsis) |
| Notes & Reference | #56-Tall Grass Prairie Wildflowers (Doug Ladd) , #69-Manual of Vascular Plants of Northeastern United States and Adjacent Canada ( Gleason, Cronquist) |
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