Comments
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Stellaria longifolia often is confused with forms of
S. longipes but differs in having leaves that are widest at or above the middle and in having the angles of the stem and/or the leaf margins minutely papillate-scabrid. The capsules can be either straw colored or black. Plants with black capsules have been named var.
atrata.
Hybrids with Stellaria borealis subsp. borealis often occur; see note under that species.
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Description
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Plants perennial, forming loose clumps, from elongate rhizomes. Stems erect or straggling, branched, square, 10-35 cm, glabrous but angles minutely papillate-scabrid. Leaves sessile; blade green to yellowish green, never glaucous, linear to very narrowly elliptic, widest at or beyond middle, 0.8-4 cm × 1-3 mm, not coriaceous, base attenuate, apex acuminate to acute, glabrous to sparingly ciliate at base, margins minutely papillate-scabrid; proximal leaves shorter and wider. Inflorescences terminal, widely divaricate, 2-many-flowered cymes; bracts lanceolate, 1-5 mm, scarious, apex acuminate. Pedicels straight or somewhat arcuate, commonly 3-30 mm, glabrous or scabrous. Flowers 5-9 mm diam.; sepals 5, obscurely 3-veined, ovate-elliptic, 2-4 mm, margins scarious, apex acute, glabrous; petals 5, 2-3.5 mm, ± equaling sepals; stamens 5-10; styles 3, ascending, ca. 1 mm. Capsules blackish purple or straw colored, ovoid-conic, 3-6 mm, much longer than sepals, opening by 6 valves; carpophore absent. Seeds brown, broadly reniform, 0.7-0.8 mm diam., slightly rugose. 2n = 26.
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Description
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Herbs perennial, glabrous. Stems densely tufted, ascending, quadrangular, 15--25 cm tall, branched, diffuse; axillary sterile branches present. Leaves linear or broadly linear, 1.5--3.5 cm × 0.5--2 mm, sometimes sparsely shortly ciliolate, midvein conspicuous, slightly narrowed at base, apex acuminate. Flowers in terminal or mostly axillary cymes; peduncles 3--6 cm, glabrous; bracts white, ovate-lanceolate, 1--2 mm, ciliate, sometimes margin membranous, apex long acuminate. Pedicel 1--1.5 cm, to 2.5 cm after anthesis, slender. Sepals 5, ovate-lanceolate, 2.5--3 mm, 3--4 mm in fruit, inconspicuously 3-veined, margin membranous, apex obtuse or slightly acute. Petals 5, subequaling or slightly longer than sepals, 2-cleft nearly to base; lobes sublinear, base narrowed, apex obtuse. Stamens 10; filaments linear; anthers yellow. Ovary ovoid-cylindric; styles 3. Capsule brown-black, ovoid-orbicular, 1.5--2 × as long as persistent sepals, 6-valved. Seeds numerous, brown, ovoid-orbicular or ellipsoid, 0.8--1 mm, nearly smooth. Fl. Jun--Jul, fr. Jun--Aug. 2n = 26.
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Distribution
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St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., Que., Sask., Yukon; Alaska, Ariz., Calif., Colo., Conn., Del., D.C., Idaho, Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Y., N.Dak., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Vt., Va., Wash., W.Va., Wis., Wyo.; Europe.
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Distribution
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Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Ningxia, Shaanxi [Japan, Korea, Mongolia, Russia; Europe, North America].
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Flowering/Fruiting
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Flowering late spring-summer.
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Habitat
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Wet meadows and woodlands, marshes, muskegs, grassy roadsides, usually in circumneutral to calcareous sites; 0-2800m.
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Habitat
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Wet meadows, forest margins, forests; ca. 1900 m.
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Synonym
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Alsine longifolia (Muhlenberg ex Willdenow) Britton; Stellaria atrata (J. W. Moore) B. Boivin; S. atrata var. eciliata B. Boivin; S. diffusa Willdenow ex Schlechtendal; S. longifolia var. atrata J. W. Moore; S. longifolia var. eciliata (B. Boivin) B. Boivin
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Synonym
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Stellaria diffusa Willdenow ex Schlechter; S. diffusa f. ciliolata Kitagawa; S. diffusa var. ciliolata (Kitagawa) Kitagawa; S. friesiana Seringe; S. longifolia f. ciliolata (Kitagawa) Y. C. Chu; S. longifolia var. legitima Regel.
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Stellaria longifolia
provided by wikipedia EN
Stellaria longifolia is a species of flowering plant in the family Caryophyllaceae known by the common name longleaf starwort.[1] It is native to much of the northern half of the Northern Hemisphere, occurring throughout northern Europe and North America. It grows in many types of moist habitat, including meadows, marshes, and roadsides. It is a rhizomatous perennial herb forming clumps with sprawling, branching stems which are mostly hairless except for tiny rough hairs along the edges of the squarish stem. The linear to lance-shaped leaves are up to 3.5 centimeters long and are oppositely arranged in pairs. The inflorescence bears several flowers, each on a short pedicel. The flower has five pointed green sepals each a few millimeters long. There are five white petals, each so deeply lobed it appears to be two.
References
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Stellaria longifolia: Brief Summary
provided by wikipedia EN
Stellaria longifolia is a species of flowering plant in the family Caryophyllaceae known by the common name longleaf starwort. It is native to much of the northern half of the Northern Hemisphere, occurring throughout northern Europe and North America. It grows in many types of moist habitat, including meadows, marshes, and roadsides. It is a rhizomatous perennial herb forming clumps with sprawling, branching stems which are mostly hairless except for tiny rough hairs along the edges of the squarish stem. The linear to lance-shaped leaves are up to 3.5 centimeters long and are oppositely arranged in pairs. The inflorescence bears several flowers, each on a short pedicel. The flower has five pointed green sepals each a few millimeters long. There are five white petals, each so deeply lobed it appears to be two.
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