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Monocotyledons / Monocotiledóneas
Rottboellia cochinchinensis (Lour.) Clayton
EOL Text
90-150 m
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Coarse annual. Culms stout, 1–3 m tall, 5–10 mm in diam., supported below by stilt roots, branched in upper part. Leaf sheaths tuberculate-hispid with stiff irritant hairs or sometimes glabrescent; leaf blades linear-lanceolate, 20–50 × 0.5–2.5 cm, glabrous or adaxial surface hispidulous, very scabrid along margins, midrib broad, white, apex acuminate; ligule a ciliate membrane, ca. 1 mm. Racemes yellow and green, 6–15 × 0.25–0.4 cm, stiff, terminating in a green tail of reduced spikelets; rachis internodes 4–6 mm, rounded on back, slightly longer than adjacent pedicel. Sessile spikelet pale yellow, 5–6 mm; lower glume ovate, minutely scaberulous on back, keeled only toward entire or very minutely 2–3-toothed apex; lower lemma as long as upper lemma. Pedicelled spikelet green, variable, 3–5 mm, narrowly ovate, herbaceous. Fl. and fr. Jul–Oct.
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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
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"Annuals. Culms 45-140 cm high, supported below by stilt roots; nodes glabrous. Leaves 10-45 x 0.4-1.5 cm, oblong-linear or linear-lanceolate, base narrowed, apex acuminate, flat; sheaths densely pubescent, to 11 cm long; ligules ovate, membranous. Spikes 5-12 cm long, cylindric, terminating in a tail, jointed; rachis obliquely fragile, crustaceous. Sessile spikelets 3-4 mm long, ovate, sunken in cavities of joints; lower glume 3-5 x 2-3 mm, ovate, coriaceous; upper glume 3-5 x 2-4 mm, boat-shaped, coriaceous; lower floret male; upper floret bisexual; first lemma 3-5 mm long, elliptic; palea 3-4 x 2 mm, ovate-lanceolate; stamens 3; second lemma 3-4 x 2-3 mm, boat-shaped; palea ovate; ovary oblong. Pedicelled spikelets 3-5 mm long, ovate-lanceolate; glumes green; lemmas hyaline."
Tall annual grass, up to 1-4 m, taller specimens often supported by stilt roots. Leaves linear, up to 45 × 2 cm, with harsh prickly hairs on the leaf sheaths Inflorescence 1-several spike-like racemes, cylindric, 3-15 cm long, hairless. Spikelets appear sunken into the main pedicel.
Rottboellia exaltata L. var. appendiculata Hack. In DC., Monogr. Phan. 6: 295. 1889; Honda, Monogr. 369. 1930.
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| Source | http://www.efloras.org/florataxon.aspx?flora_id=1050&taxon_id=200026228 |
cochinchinensis: of Cochin, China where the type specimen was collected.
Stegosia cochinchinensis Loureiro, Fl. Cochinch. 51. 1790; Rottboellia exaltata Linnaeus f. (1781), not (Linnaeus) Linnaeus f. (1779).
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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242414244 |
Flowering class: Monocot Habit: Herb
"Semi-evergreen and moist deciduous forests, grasslands and wastelands"
Throughout the Old World Tropics. Introduced in the Caribbean.