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Imagem de Stipa comata Trin. & Rupr.
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Stipa comata Trin. & Rupr.

Physical Description ( Inglês )

fornecido por USDA PLANTS text
Perennials, Terrestrial, not aquatic, Stems nodes swollen or brittle, Stems erect or ascending, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stem nodes bearded or hairy, 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 conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly open, or loose, Leaf sheath smooth, glabrous, Leaf sheat h hairy, hispid or prickly, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades very narrow or filiform, less than 2 mm wide, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Leaf blades more or less hairy, Ligule present, Ligule an unfringed eciliate membrane, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence a contracted panicle, narrowly paniculate, branches appressed or ascending, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Flowers bisexual, Spikelets pedicellate, Spikelets dorsally compressed or terete, Spikelet less than 3 mm wide, Spikelets with 1 fertile floret, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating above the glumes, glumes persistent, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes equal or subequal, Glumes equal to or longer than adjacent lemma, Glumes awn-like, elongated or subulate, Glumes awned, awn 1-5 mm or longer, Glumes 4-7 nerved, Lemma coriaceous, firmer or thicker in texture than the glumes, Lemma 5-7 nerved, Lemma body or surface hairy, Lemma apex acute or acuminate, Lemma mucronate, very shortly beaked or awned, less than 1-2 mm, Lemma distinctly awned, more than 2-3 mm, Lemma with 1 awn, Lemma awn 2-4 cm long or longer, Lemma awned from tip, Lemma awn twisted, spirally coiled at base, like a corkscrew, Lemma awn twice geniculate, bent twice, Lemma margins inrolled, tightly covering palea and caryopsis, Lemma straight, Callus or base of lemma evidently hairy, Callus hairs shorter than lemma, Lemma surface pilose, setose or bristly, Palea present, well developed, Palea membranous, hyaline, Palea shorter than lemma, Palea 2 nerved or 2 keeled, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis, Caryopsis ellipsoid, longitudi nally grooved, hilum long-linear.
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cc-by-nc-sa-3.0
compilador
Dr. David Bogler
fonte
Missouri Botanical Garden
fonte
USDA NRCS NPDC
original
visite a fonte
site do parceiro
USDA PLANTS text

Hesperostipa comata ( Inglês )

fornecido por wikipedia EN

Hesperostipa comata, commonly known as needle-and-thread grass, is a species of grass native to North America, especially the western third. It has a wide distribution spanning from northern Canada to Mexico.[1]

Description

Hesperostipa comata is a perennial bunchgrass producing erect, unbranched stems to about 1 m (3 ft 3 in) in maximum height. The narrow inflorescence is up to 28 cm (11 in) long in taller plants, with the mature spikelet bearing a spiraling, hairy, spear-shaped awn[2] up to 19 cm (7+12 in) in length.

The seeds of this grass have hygroscopic extensions that bend with changes in humidity, enabling them to disperse over the ground.[1] Each seed has an awn that twists several turns when the seed is released. Increased moisture causes it to untwist, and, upon drying, to twist again, thus the seed is drilled into the ground.

Habitat

This is a grass of many habitat types, from grassland to pine forest. Young shoots provide a favored food source for black-tailed prairie dogs and black-tailed jackrabbits, and the grass is a good early spring graze for livestock before it develops its long, sharp awn.

Cultural

This species was described by the explorers during the Lewis and Clark Expedition.

Needle and thread grass is the provincial grass of the prairie province of Saskatchewan.

This species is popular among children because of the seed's ability to be thrown and stick to clothing.

References

  1. ^ a b Zlatnik, Elena (1999). "Hesperostipa comata". Fire Effects Information System (FEIS). US Department of Agriculture (USDA), Forest Service (USFS), Rocky Mountain Research Station, Fire Sciences Laboratory.
  2. ^ Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 70. ISBN 0-87842-280-3. OCLC 25708726.

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cc-by-sa-3.0
direitos autorais
Wikipedia authors and editors
original
visite a fonte
site do parceiro
wikipedia EN

Hesperostipa comata: Brief Summary ( Inglês )

fornecido por wikipedia EN

Hesperostipa comata, commonly known as needle-and-thread grass, is a species of grass native to North America, especially the western third. It has a wide distribution spanning from northern Canada to Mexico.

licença
cc-by-sa-3.0
direitos autorais
Wikipedia authors and editors
original
visite a fonte
site do parceiro
wikipedia EN

Hesperostipa comata ( Francês )

fornecido por wikipedia FR

Hesperostipa comata, de nom commun stipe comateuse[1], est une espèce d'herbe nord-américaine de la famille des Poaceae et du genre Hesperostipa.

Description

Hesperostipa comata est une graminée vivace produisant des tiges dressées et non ramifiées d'une hauteur maximale d'environ 1 m. L'inflorescence étroite mesure jusqu'à 28 cm de long chez les plantes plus hautes, l'épillet mature portant une arête en forme de lance en spirale, poilue, atteignant 19 cm de longueur.

Les graines de cette herbe ont des extensions hygroscopiques qui se plient avec les changements d'humidité, leur permettant de se disperser sur le sol. Chaque graine a une arête qui se tord de plusieurs tours lorsque la graine est libérée. Une humidité accrue le fait se détordre et, après séchage, se tord à nouveau, ainsi la graine est plantée dans le sol.

Répartition

La stipe comateuse a une large distribution allant du nord du Canada au Mexique.

Écologie

Elle est une herbe de nombreux types d'habitats, des prairies aux forêts de pins. Hesperostipa comata pousse souvent avec Achnatherum thurberianum (en), Aletes humilis (en), Asclepias uncialis, Astragalus mulfordiae (en), Carex inops.

Les jeunes pousses constituent une source de nourriture privilégiée pour les chiens de prairie à queue noire et les lièvres de Californie, et l'herbe est un bon pâturage au début du printemps pour le bétail avant de développer sa longue arête acérée.

Elle est une nourriture privilégiée d'orthoptères comme Aulocara elliotti, Metator pardalinus, Spharagemon collare, Spharagemon equale.

Elle est une plante hôte pour la chenille de Grammia blakei (en).

Culture

La plante est décrite lors de l'expédition Lewis et Clark.

La stipe comateuse est un symbole du Saskatchewan, elle est choisie puisqu’elle est l’herbe dominante de cette écorégion composée de prairies mixtes[2].

Cette espèce est populaire parmi les enfants en raison de la capacité de la graine à être jetée et à coller aux vêtements.

Notes et références

  • (en) Cet article est partiellement ou en totalité issu de l’article de Wikipédia en anglais intitulé .
  1. « Site sur la rusticité des plantes du Canada », sur Ressources naturelles Canada (consulté le 4 décembre 2020)
  2. « Les symboles provinciaux de la Saskatchewan », sur canada.ca (consulté le 4 décembre 2020)

licença
cc-by-sa-3.0
direitos autorais
Auteurs et éditeurs de Wikipedia
original
visite a fonte
site do parceiro
wikipedia FR

Hesperostipa comata: Brief Summary ( Francês )

fornecido por wikipedia FR

Hesperostipa comata, de nom commun stipe comateuse, est une espèce d'herbe nord-américaine de la famille des Poaceae et du genre Hesperostipa.

licença
cc-by-sa-3.0
direitos autorais
Auteurs et éditeurs de Wikipedia
original
visite a fonte
site do parceiro
wikipedia FR

Stipa comata ( Vietnamita )

fornecido por wikipedia VI

Stipa comata là một loài thực vật có hoa trong họ Hòa thảo. Loài này được Trin. & Rupr. miêu tả khoa học đầu tiên năm 1842.[1]

Hình ảnh

Chú thích

  1. ^ The Plant List (2010). Stipa comata. Truy cập ngày 9 tháng 6 năm 2013.

Liên kết ngoài


Bài viết chủ đề tông thực vật Stipeae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
licença
cc-by-sa-3.0
direitos autorais
Wikipedia tác giả và biên tập viên
original
visite a fonte
site do parceiro
wikipedia VI

Stipa comata: Brief Summary ( Vietnamita )

fornecido por wikipedia VI

Stipa comata là một loài thực vật có hoa trong họ Hòa thảo. Loài này được Trin. & Rupr. miêu tả khoa học đầu tiên năm 1842.

licença
cc-by-sa-3.0
direitos autorais
Wikipedia tác giả và biên tập viên
original
visite a fonte
site do parceiro
wikipedia VI