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Physical Description ( англиски )

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Annuals, Terrestrial, not aquatic, Stems nodes swollen or bri ttle, Stems geniculate, decumbent, or lax, sometimes rooting at nodes, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stem internodes solid or spongy, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly basal, below middle of stem, Leaves mostly cauline, Leaves sheathing at base, Leaf sheath mostly open, or loose, Leaf sheath hairy at summit, throat, or collar, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades very narrow or filiform, less than 2 mm wide, Leaf blades 2-10 mm wide, Leaf blades mostly flat, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Leaf blades scabrous, roughened, or wrinkled, Ligule present, Ligule a fringe of hairs, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence a contracted panicle, narrowly paniculate, branches a ppressed or ascending, Inflorescence a dense slender spike-like panicle or raceme, branches contracted, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence branches more than 10 to numerous, Flowers bisexual, Spikelets pedicellate, Spikelets laterally compressed, Spikelet less than 3 mm wide, Spikelets with 3-7 florets, Spikelets with 8-40 florets, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating above the glumes, glumes persistent, Spikelets disarticulating beneath or between the florets, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes equal or subequal, Glumes distinctly unequal, Glumes shorter than adjacent lemma, Glumes 1 nerved, Lemmas thin, chartaceous, hyaline, cartilaginous, or membranous, Lemma similar in texture to glumes, Lemma 3 nerved, Lemma glabrous, Lemma apex acute or acuminate, Lemma awnless, Lemma margins thin, lying flat, Lemma straight, Palea present, well developed, Palea membranous, hyaline, Palea shorter than lemma, Palea 2 nerved or 2 keeled, Palea keels winged, scabrous, or ciliate, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis, Caryopsis ellipsoid, longitudinally grooved, hilum long-linear.
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Eragrostis pectinacea ( англиски )

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Eragrostis pectinacea is a species of grass known by the common name tufted lovegrass. This plant is native to the Americas from Canada to Argentina. It is widespread, growing in most open spaces at varying elevations and habitats, including in disturbed areas and roadsides.

Description

Eragrostis pectinacea is an annual tuft-forming bunchgrass, reaching maximum heights of anywhere from 10 to 80 centimeters. It is mostly hairless except for a fringe of hairs near where the leaf blade meets the sheath. The inflorescence is open with spreading branches holding yellowish to purplish spikelets, each just under centimeter long. Each narrow spikelet has up to 15 or 20 tiny florets.

Taxonomy

Eragrostis pectinacea was first described by André Michaux in 1803, as Poa pectinacea. It was transferred to Eragrostis in 1841 by Christian Nees von Esenbeck.[1] Eragrostis tracyi is treated by some sources as a variety of this species, but recognized by others as a separate species.[2]

Distribution

Eragrostis pectinacea is widely distributed in the Americas, from Canada through the United States to Mexico in northern America, in Central America and the Caribbean, and in parts of South America. It has been introduced into Europe and further south than its native range in South America, in northeast Argentina and Uruguay.[1]

References

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Eragrostis pectinacea: Brief Summary ( англиски )

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Eragrostis pectinacea is a species of grass known by the common name tufted lovegrass. This plant is native to the Americas from Canada to Argentina. It is widespread, growing in most open spaces at varying elevations and habitats, including in disturbed areas and roadsides.

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Eragrostis pectinacea ( виетнамски )

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Eragrostis pectinacea là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (Michx.) Nees mô tả khoa học đầu tiên năm 1841.[1]

Hình ảnh

Chú thích

  1. ^ The Plant List (2010). Eragrostis pectinacea. Truy cập ngày 6 tháng 6 năm 2013.

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Eragrostis pectinacea: Brief Summary ( виетнамски )

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Eragrostis pectinacea là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (Michx.) Nees mô tả khoa học đầu tiên năm 1841.

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