| Dicotyledon | Literature for Euphorbia hirta
Wagner et al., 1990, 1999; Lorence & Wagner, 2020. |
| Euphorbiaceae -- The Spurge Family | Bibliography |
| Euphorbia hirta | |
Common name(s): spurge, garden spurge, hairy spurge, koko kahiki |
| General Information | ||
|---|---|---|
| Distribution | Native from southern United States to Argentina, the West Indies, and the Paleotropics.In the Hawaiian Islands, naturalized on Kure, Midway, French Frigate Shoals, Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i. | |
| Habit |
Annual herb; stems 2–60 cm, decumbent, tomentose with short, curly hairs interspersed with longer, spreading, yellow hairs. |
|
| Leaves |
Leaves distichous, slightly unequal; blade green, sometimes tinged red, often with red spots, membranous, ovate to rhombic-ovate or lanceolate, 5–50 mm long, 3–18 mm wide, appressed pilose, margin serrate, apex acute, base acute, rounded, or subcordate; petiole 1–2 mm long; stipules linear lanceolate, 1–2 mm long, ciliate. |
|
| Flowers |
Cyathia in congested, lateral, short pedunculate, few flowered cymes; involucre 0.5–0.8 mm high, densely strigose to glabrate, glands 5, orbicular, 0.1–0.3 mm long, appendages white, glabrous, margin entire, often absent. Staminate flowers 2–8 per cyathium. |
|
| Fruit |
Fruit broadly ovoid, 3-angled, 0.8–1 mm long, 1–1.2 mm in diameter, strigose. |
|
| Seeds |
Seeds pale brown, ovoid, falcate, 4-angled, 0.5–0.7 mm long, faces wrinkled. |
|
| Chromosomes |
2n = 12, 16, 18, 20. |
|
| Contributor |
Nancy Khan |
