| Dicotyledon | Literature for Youngia japonica
Wagner et al., 1990, 1999. |
| Asteraceae -- The Sunflower Family | Bibliography |
| Youngia japonica | |
Common name(s): Oriental hawksbeard |
| General Information | ||
|---|---|---|
| Distribution | Native to southeastern Asia, now a pantropical weed.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i. | |
| Habit |
Subscapose annual herbs 1-9 dm tall, glabrous or pubescent toward base. |
|
| Leaves |
Leaves basal or rarely a few cauline, lyrate-pinnatifid or oblanceolate and ± lobed, 2-22 cm long, 0.5-5 cm wide. |
|
| Flowers |
Heads small, numerous in corymbose or paniculate inflorescences; involucre 3.5-5 mm high, glabrous, inner bracts ca. 8, outer ones ca. 5; ray florets 10-20 per head, rays 3-4 mm long.
|
|
| Fruit |
Achenes brownish, 1.5-2.5 mm long, somewhat compressed, tapering at apex, but scarcely beaked. |
|
| Chromosomes |
2n = 16, 18 |
|
