| Monocotyledon | Literature for Tragus berteronianus
Wagner et al., 1990, 1999. |
| Poaceae -- The Grass Family | Bibliography |
| Tragus berteronianus | |
Common name(s): bertero goatgrass, bur grass |
| General Information | ||
|---|---|---|
| Distribution | Native range unknown, distributed throughout Africa, warmer parts of America, and Asia.In the Hawaiian Islands, naturalized on O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe. |
|
| Habit |
Annuals; culms erect or decumbent at base, 1-2.5 dm tall, pubescent below racemes. |
|
| Leaves |
Sheaths 1-3 cm long, glabrous, striate, the uppermost often dilated; ligule ciliate, 0.5-0.7 mm long; blades thick, firm, 1.5-2 cm long or the uppermost vestigial, 1-3 mm wide, margins undulate, cartilaginous, pubescent with stiff white hairs. |
|
| Flowers |
Racemes 3-7 cm long, 4-5 mm in diameter, often enclosed within the uppermost sheaths, rachis slender, pubescent; burs 2-3 mm long, beaked, pedicels pubescent, up to 0.5 mm long; spikelets 2 per bur; first glume absent, second glumes of the 2 spikelets forming the halves of a bur, convex, 3-nerved, the nerves bearing a row of stout hooked spines on either side; lemma ca. 2 mm long, apex acute, sparsely pubescent; palea 1.5-2
mm long, glabrous, apex acute. |
|
| Fruit |
Caryopsis golden brown, 1.2-1.5 mm long. |
|
| Chromosomes |
2n = 20 |
|