| Description | Yellow Hawkweed (Hieracium caespitosum) is an introduced wildflower that has become an invasive weed in many areas. Has naturalize and often grows in large colonies. |
|---|---|
| Pronunciation | (kess-pi-TOH) |
| Plant Type | Perennials Hardy, Weeds, Wild Flowers |
| Sunlight | Found mostly growing in full sun. |
| Moisture | average |
| Soil & Site | average |
| Flowers | A cluster of 5 to 25 dandelion-like, long-stalked flowers appears at the top of the stem. The cluster is often tight and flattish but may be more loosely arranged. The yellow flowers are about ½ inch in diameter and have 25 to 50 rays (petals). |
| Fruit | The fruit is a seed with attached fluff that helps disperse the seeds by wind. |
| Leaves | Leaves are mostly basal. Leaves on the stem are much smaller. They are lance-shaped and covered in star-shaped hairs. |
| Stems | Flowering stems are single, unbranched, and covered in a mix of differnt types of hair. p |
| Roots | Roots are fibrous, growing off the underground rhizomes. |
| Dimensions | 12 inches tall can spread over 3 feet |
| Propagation | It naturally propagates from seeds. Can also be increased by division. |
| Cultivar Origin | Introduced as a garden ornamental from its native Europe |
| Misc Facts | To remove the plant, dig it out and obtain as many rhizomes as possible. It spreads rapidly through its rhizomes, abundant wind-dispersed seed, and its root bud production. Syn. Pilosella caespitosa |
| Author's Notes | Although I have never seen it for sale, it is reported to have been sold as an ornamental. This plant is invasive, so don't plant it in your garden. |
| Notes & Reference | #143-Weeds of the North Central States, #191-Minnesota Wild Flowers (www.minnesotawildflowers.info), #270-North Carolina Extension Gardener Tool Box (https://plants.ces.ncsu.edu/plants) |
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