| Dicotyledon | Literature for Erigeron bonariensis
Wagner et al., 1990, 1999; Lorence & Wagner, 2020. |
| Asteraceae -- The Sunflower Family | Bibliography |
| Erigeron bonariensis | |
Common name(s): `awi`awi, `ui`ui, `uwi`uwi, ilioha, pua mana, hairy horseweed, lani wela (Ni`ihau) |
| General Information | ||
|---|---|---|
| Distribution | In the Hawaiian Islands, naturalized on Kure, Midway, Laysan, French Frigate Shoals, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i. |
|
| Habitat | Dry areas | |
| Habit |
Annual or sometimes perennial herb, <6 dm tall, often branched near base or unbranched, densely pubescent. |
|
| Leaves |
Leaves numerous, linear to lanceolate, usually grayish green, proximal ones to 15 cm long, 2 cm wide, becoming progressively smaller upward, usually 3‒6 cm long, <0.4 cm wide, coarsely serrate, sessile. |
|
| Flowers |
Inflorescence spiciform with short side branches. Heads usually numerous; involucre 4‒6 mm high, phyllaries rather densely hispid-hirsute, with broad-based hairs; ray florets 50‒200 or more per head, pistillate, rays ca. 0.5 mm long; pappus yellowish brown to reddish, in a single series, usually shorter than or equaling the disk florets. |
|
| Chromosomes |
2n = 18, 26, 32, 36, 54. |
|
| Contributor |
Nancy Khan |