| Dicotyledon | Literature for Acanthospermum australe
Wagner et al., 1990, 1999. |
| Asteraceae -- The Sunflower Family | Bibliography |
| Acanthospermum australe | |
Common name(s): star-bur, `ihi kukae hipa, kukaehipa, Paraguay bur, pipili, spiny bur |
| General Information | ||
|---|---|---|
| Distribution | Native to South America.In the Hawaiian Islands, naturalized on Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i. | |
| Habit |
Stems prostrate, often rooting at the nodes, 1-6 dm long, pubescent with short appressed hairs. |
|
| Leaves |
Leaves rhombic-ovate to triangular, 1.5-3.5 cm long, 1-3 cm wide, with conspicuous glands on both surfaces, margins irregularly serrate above the middle, base cuneate, petioles 0.3-1.5 cm long. |
|
| Flowers |
Heads 4-6 mm in diameter at anthesis. |
|
| Fruit |
Burs ellipsoid to oblong, 7-9 mm long, the ribs bearing 1-2 rows of hooked prickles 1-2 mm long, the prickles all uniform in size. |
|
| Chromosomes |
2n = 20, 22 |
|
