Culm sheaths deciduous, brown hispid abaxially; auricles narrow, glabrous, apex truncate; oral setae sparse, very weak; ligules ca. 1.5 mm tall in middle, margin dentate and long ciliate; blades erect, deciduous, lanceolate, apex long attenuate, nearly glabrous abaxially, slightly scabrous adaxially.

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Basal leaves with petioles (0.5-)1.5-4 cm, ciliate with simple trichomes; leaf blade 1- or 2-pinnatesect, oblong or ovate in outline, 1.5-6 × 0.7-3 cm; ultimate segments linear-oblong, oblong, or rarely ovate, 1.5-15 × 0.5-3 mm, apex obtuse or subacute.

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Plants with basal rosettes, turions, or stolons, not basal shoots, rarely clumped; stems often with persistent basal scales

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Leaves sublinear to narrowly lanceolate, subentire to obscurely denticulate; stolons with fleshy terminal turions; fruiting pedicels 1-5 cm; seed comas dingy white.

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Sepals erect, subequal, ovate to oblong-ovate or oblong-spatulate, 7-10 × 4.5-6.2 mm; laminar glands lines, sometimes interrupted; margin entire or minutely denticulate and sometimes with narrowly hyaline margin, apex acute or apiculate to obtuse.

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Basal leaf blade orbicular or broadly ovate-orbicular, base cordate with a deep sinus, apex obtuse and apiculate; cauline leaf much smaller than basal ones; petals oblanceolate, with 2 green, oblong glands near base, apex acute

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Basal and involucral bract blade with petiolules 2--5 mm; sepals 10--18 mm, pilose, with 5--9 vein anastomoses

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Leaves alternate, long petiolate; leaf blade palmately 3--9-foliolate or pinnately 3-foliolate; petiolules unequal; leaflet margins entire.

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"The results of this study do not support the use of orthoses, either custom soft or semirigid biomechanical, as prophylactic treatment for weight bearing–induced back pain," the authors write.

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It was also found that the strength of FF specimen is close to the sumation of the strengths of FC and FS specimens with the same board thickness and screw spacing as FF specimen. As compared the test results with the research findings from Li [2]and Luo [3], It can be concluded that the failure mode of specimen is affected by both the sheathing thickness and the stud thickness. Different from this study, the failure mode of Li's test specimens is torsional-flexural buckling for most cases. The predicted values computed based on the AISI Specification seem to be conservative as compared to the tested values of FF specimens. Therefore, it is suggested that the effective length factor, K, can be taken as 0.5 to determine the wall stud assembly strength.

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