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190. Eulalia Kunth, Révis. Gramin. 1: 160. 1829.
黄金茅属 huang jin mao shu
Authors: Shou-liang Chen & Sylvia M. Phillips
Perennial, rarely annual. Culms tufted, usually erect and unbranched. Leaf blades linear to narrowly lanceolate; ligule short, membranous, margin ciliolate. Inflorescence terminal, composed of several to many racemes inserted digitately or along a short axis; racemes elongate with many spikelet pairs, hairy, fragile, sessile and pedicelled spikelets of a pair similar, pedicelled often slightly narrower, both fertile; rachis internodes linear, ciliate along angles; pedicels resembling internodes, usually slightly shorter and more slender. Spikelets lanceolate to narrowly oblong, dorsally compressed; callus short, bearded, hairs usually less than 1/2 spikelet length; glumes cartilaginous to leathery; lower glume flat or slightly concave, hairy, back veinless or inconspicuously veined, flanks rounded in lower half, keeled toward apex, acute to truncate; upper glume boat-shaped, 1-keeled down midline; lower floret reduced to an empty hyaline lemma, rarely absent; upper lemma linear to oblong, occasionally broader, shortly 2-toothed or 2-lobed to middle, awned (E. manipurensis awnless); awn geniculate, sometimes weakly; palea small or absent. Stamens 3. x = 9, 10.
About 30 species: tropical and subtropical regions of the Old World; 14 species (five endemic) in China.
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| 1 |
Basal leaf sheaths covered in dense woolly hairs |
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(2) |
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Basal leaf sheaths glabrous, or appressed hairy between veins |
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(6) |
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| 2 (1) |
Basal leaf sheath hairs creamy or golden brown |
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(3) |
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Basal leaf sheath hairs dark brown or reddish brown |
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(4) |
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| 3 (2) |
Sessile spikelets 6–6.5 mm; raceme hairs pinkish. |
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1 E. siamensis |
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Sessile spikelets 4.6–5.7 mm; raceme hairs yellowish. |
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2 E. speciosa |
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| 4 (2) |
Culms robust, 2–5 mm in diam.; leaf blades 25–50 cm. |
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2 E. speciosa |
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Culms slender, 1–1.7 mm in diam.; leaf blades 15–30 cm |
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(5) |
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| 5 (4) |
Culms 6–9-noded; spikelets 3–3.5 mm; lower glume pilose with whitish brown hairs, apex truncate. |
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3 E. micranthera |
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Culms 2–3-noded; spikelets 3.5–5 mm; lower glume densely villous with golden brown hairs, apex subacute. |
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4 E. phaeothrix |
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| 6 (1) |
Sessile spikelet 5–7 mm; lower glume 2-veined between lateral keels, veins connected below apex |
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(7) |
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Sessile spikelet 3–5 mm; lower glume usually not or only obscurely veined between lateral keels |
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(8) |
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| 7 (6) |
Leaf blades 8–16 mm wide, apex acute. |
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1 E. siamensis |
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Leaf blades 4–6(–8) mm wide, apex acuminate-filiform. |
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5 E. quadrinervis |
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| 8 (6) |
Spikelets awnless. |
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6 E. manipurensis |
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Spikelets awned |
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(9) |
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| 9 (8) |
Plant with slender spreading stolons; raceme hairs brown; lower lemma absent. |
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7 E. leschenaultiana |
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Plant tufted or rhizomatous; raceme hairs white or purplish (spikelets often brown); lower lemma present |
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(10) |
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| 10 (9) |
Leaf blades conspicuously pruinose on abaxial surface, lanceolate or linear-lanceolate, 5–10 mm wide |
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(11) |
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Leaf blades green or reddish, linear, 2–6 mm wide |
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(12) |
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| 11 (10) |
Leaf blades 3–8 cm, glabrous; upper lemma 2-lobed to middle. |
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8 E. brevifolia |
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Leaf blades 10–20 cm, tomentose; upper lemma very shortly 2-toothed. |
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9 E. pruinosa |
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| 12 (10) |
Racemes with long silky hairs concealing the spikelets; plant with slender spreading rhizomes. |
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10 E. mollis |
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Racemes with shorter hairs, spikelets obvious; plant without long rhizomes |
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(13) |
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| 13 (12) |
Leaf blades inrolled, tough; upper glume with 2–2.5 mm awn. |
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11 E. pallens |
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Leaf blades flat, herbaceous; upper glume not awned |
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(14) |
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| 14 (13) |
Inflorescence with ca. 5 cm axis; upper lemma very shortly 2-toothed. |
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12 E. splendens |
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Inflorescence digitate or axis less than 5 cm; upper lemma deeply 2-toothed |
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(15) |
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| 15 (14) |
Culm glabrous below inflorescence; raceme hairs silvery white; upper lemma 2-toothed to middle. |
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13 E. trispicata |
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Culm densely pilose below inflorescence; raceme hairs faintly mauve tinged; upper lemma 2-toothed in upper 1/4. |
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14 E. yunnanensis |
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List of lower taxa
| Related Links (opens in a new window) |
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Treatments in Other Floras @ www.efloras.org
Other Databases
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