leaf sheath


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Related to leaf sheath: ligules

leaf sheath

the part at the bottom of a leaf that surrounds a stem, as in grasses.
References in periodicals archive ?
On orchids, mealybugs typically congregate beneath the leaf sheaths, at the bases of leaf petioles, and occasionally on the underside of the leaves, affording these pests protection from predators and contact insecticides (McKenzie 1967).
42 Table 3:Percent of leaf sheath moisture of Sugarcane in triple-cropping and double-cropping of Sugarcane.
Chemical composition of whole corn stover and different morphological fractions (%, air-dry basis) Nutrient Tassel Leaf blade Leaf sheath Stem rind Stem pith DM 92.
Shed leaf sheaths of areca nut palm as a major breeding source of Ae.
epiphytic and acaulescent), leaf sheaths not forming a pseudobulb (vs.
From the samples collected in October two fractions were separated: leaf blades and stems with leaf sheaths (the panicles were ragged by the wind in October).
Leaves more than 25 cm long; leaf sheaths (around base of fascicle) more than 2 cm long; terminal buds silvery white; mature seed (female) cones usually more than 15 cm long P.
Leaves laxly spreading in a dense rosette, 50 to 80 in number: leaf sheaths ovate to broadly elliptic, 8-10 x 6-9 cm, castaneous especially adaxially, densely brown punctate-lepidote especially adaxially; leaf blades narrow triangular, attenuate, 25-40 x 2-3 cm, moderately coriaceous, densely punctate-lepidote especially abaxially, grey to grey-green.
Leaves erect to spreading, rosulate, 8 to 20 in number, 75-120 cm long; leaf sheaths narrowly elliptic, 4-12 x 2-4 cm, castaneous with a thin pale margin, nerved, proximally very densely covered with asymmetrical and shaggy dark ferruginous trichomes; leaf blades linear, attenuate, 3-7mm wide, involute, inconspicuously and obtusely plicate, densely ferruginous lepidote toward the sheath especially abaxially becoming scattered dark punctate-lepidote toward the apex.
53a- Scape distinctly shorter than the leaf sheaths or exceeding them for ca.
Leaf sheaths narrowly elliptic, 4-6 x 3-4 cm, densely brown punctate-lepidote throughout, dark castaneous abaxially.