Comments
(
Anglèis
)
fornì da eFloras
Gymnostomum calcareum has been widely reported for North America, but H. A. Crum and L. E. Anderson (1958), after considerable study, indicated that all reports were G. aeruguinosum. R. H. Zander (1977) synonymized the two species, citing intergradation of important features. With recent discoveries of material widely distributed in California, the question was reopened and a re-examination of authentic material from Europe revealed apparently overlooked traits. Vegetatively, G. aeruginosum grades into G. calcareum at least in North America, with G. calcareum more often in tight turfs, being generally a smaller plant, often with strict leaves having rounded leaf apices and sides nearly parallel, and distal laminal cells slightly smaller. The perichaetia, however, are usually lateral on the main axis, terminating a short branch (though this branch is somewhat longer than that found in Anoectangium, e.g., A. handelii also known for California) and the bracts are much like those of Anoectangium. The capsules of most specimens have bulging exothecial cells, but occasional specimens of what are clearly G. calcareum have capsules typical of G. aeruginosum. The perigonia of G. aeruginosum have rather acute, somewhat modified bracts, and these should not be mistaken for the perichaetia of G. calcareum. A general survey of Gymnostomum in North America indicates it is restricted to California, one station in Missouri (Clayton), one in North Carolina, and is confirmed for Tamaulipas in Mexico. The collection from Missouri has the characteristic small, strict, long-rectangular, apiculate cauline leaves, and well-differentiated perichaetial leaves of G. calcareum, but the capsule of G. aeruginosum; this intergrades with the concept of G. boreale Nyholm & Hedenäs, reported for Quebec by P. Boudier (2003), which is not here recognized for the flora area. The North Carolina material has long been reported as Anoectantium euchloron, a synonym of A. aestivum, being a warm-temperate and tropical blunt-leaved variant, but differs in the flattened U-shaped leaf section, perichaetia born on stalks longer than those of Anoectangium in series near the end of a stem, not directly from a lateral leaf axil, and perichaetial leaves mainly differentiated in proximal 1/2, not throughout except for the innermost.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Plants slender, less than 10 mm high, dark yellowish green, in cushions. Stems erect, usually simple. Leaves 0.7–0.8 mm long, narrowly elliptic-lanceolate to ligulate, blunt or rounded at the apex; margins plane, entire; costa stout, ending below the apex; upper leaf cells rounded quadrate, somewhat thick-walled, pluripapillose; basal cells rectangular, thin-walled, smooth, hyaline. Setae slender, 3–4 mm long; capsules ovoid-cylindrical.
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Description
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Anglèis
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fornì da eFloras
Plants light to dark green, loosely cespitose, crowded or sometimes forming a dense turf. Cauline leaves long-rectangular or less commonly lanceolate, straight to weakly reflexed apically, 0.4-0.6(-0.8) mm, apex rounded to broadly acute, occasionally apiculate; distal marginal cells sometimes 2-stratose in patches, distal laminal cells 5-8(-10) µm in width, 1-2:1; distal adaxial costal cells elongate, occasionally short-rectangular or quadrate in robust plants. Specialized asexual reproduction absent. Perichaetia often multiple on an axis, terminating short or rather elongate lateral branches; perichaetial leaves usually stiff and often secund, narrowly lanceolate to triangular, commonly with all cells elongate, rectangular to rhomboidal, smooth or weakly papillose, occasionally quadrate distally but then perichaetial leaves lanceolate or very strongly sheathing in proximal half. Capsule elliptical, with a circumstomal collar and bulging exothecial cells, usually 30-40(-50) µm wide.
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Distribution
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Distribution: China, Sikkim, western Asia, Africa, Europe, North and South America, and Australia.
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Habitat
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Anglèis
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Habitat: on calcareous rocks in alpine regions or on thin soil over rocks.
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Comprehensive Description
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Anglèis
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fornì da Smithsonian Contributions to Botany
Gymnostomum calcareum
Gymnostomum calcareum Nees & Hornsch., Bryol. Germ. 1: 153, 1823. [Original material: Near München, coll. Hornschuch.]
Plants in dense, yellowish green cushions, to 10 mm high. Leaves to 1.0 mm long, to 0.08 mm wide, narrowly oblong, apex obtuse to rounded; costa ca. 30 μm at base; cells of lamina 6–12 μm in diameter, subquadrate to wider than long, a few basal cells to 15 μm long. Setae 3–4 mm long, pale. Capsule urn to 1 mm long, 0.5 mm wide. Spores 8–10 μm in diameter.
Brotherus reported the species from both Mas Afuera and Mas a Tierra but no specimens have been seen in this study. The world distribution is claimed to include Europe, Azores, North Africa, Caucasus, Himalaya, Siberia, North America, Mexico, Guatemala, Ecuador, Chile, Tristan da Cunha, East Australia, Tasmania, and New Zealand. A more restricted interpretation of the species was given by Crum and Anderson (1956) according to whom much of the material outside of the Mediterranean region and California would actually be G. aeruginosum Sm. At best, distinctions are not clear and little is gained by changing names at this time.
- sitassion bibliogràfica
- Robinson, Harold E. 1975. "The mosses of Juan Fernandez Islands." Smithsonian Contributions to Botany. 1-88. https://doi.org/10.5479/si.0081024X.27
Gymnostomum calcareum
(
Anglèis
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fornì da wikipedia EN
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Gymnostomum calcareum: Brief Summary
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fornì da wikipedia EN
Gymnostomum calcareum is a species of moss belonging to the family Pottiaceae.
It has cosmopolitan distribution.
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Nagosz wapienny
(
polonèis
)
fornì da wikipedia POL
Multimedia w Wikimedia Commons Nagosz wapienny (Gymnostomum calcareum Nees & Hornsch.) – gatunek mchu należący do rodziny płoniwowatych (Pottiaceae Schimp.).
Rozmieszczenie geograficzne
Występuje w Ameryce Północnej (Stany Zjednoczone, Meksyk), Europie, Azji, Afryce, na wyspach atlantyckich (Azory, Wyspy Kanaryjskie), wyspach Oceanu Indyjskiego, Nowej Zelandii, Australii[3] i Ameryce Południowej[4].
Morfologia
- Gametofit
- Rosną w skupisku lub gęstej darni, barwy jasno do ciemnozielonej. Łodyżki wyprostowane, zazwyczaj pojedyncze, osiągają do 10 mm wysokości. Listki podłużne lub lancetowate, proste do lekko odgiętych przy wierzchołku, długości od 0,4–0,6 mm do 0,7–0,8 mm. Wierzchołek listka zaokrąglony do szeroko zaostrzonego. Żebro sztywne, kończy się poniżej szczytu listka[3][4].
- Sporofit
-
Seta smukła, długości 3–4 mm. Puszki zarodni eliptyczne lub jajowate do cylindrycznych. Zębów perystomu brak[3][4].
Biologia i ekologia
Puszki z zarodnikami dojrzewają na wiosnę[3]. Rośnie na wilgotnych powierzchniach klifów, mokrych skałach w pobliżu wodospadów[3], na skałach wapiennych w regionach górskich lub na cienkiej warstwie gleby na podłożu skalnym[4]. Występuje na niskich do średnich wysokościach (150–700 m n.p.m.)[3].
Systematyka i nazewnictwo
Synonimy[2]: Gymnostomum gracillimum Nees & Hornsch., Gymnostomum parisii R. Br. bis, Gymnostomum pygmaeum R. Br. bis, Gymnostomum salmonii R. Br. bis, Gyroweisia lineafolia Kindb., Mollia calcarea (Nees & Hornsch.) Lindb., Trichostomum linearifolium R. Br. bis.
Odmiany[2]:
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Gymnostomum calcareum var. brevisetum (Nees & Hornsch.) Rabenh.
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Gymnostomum calcareum var. longifolium Dixon
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Gymnostomum calcareum var. viridulum (Brid.) Bruch & Schimp.
Zagrożenia
Gatunek został wpisany na czerwoną listę mchów województwa śląskiego z kategorią zagrożenia „DD” (o nieokreślonym zagrożeniu, wymagające dokładniejszych danych, stan na 2011 r.). W Czechach (w 2005 r.) i na Słowacji (w 2001 r.) nadano mu kategorię „VU” (narażony na wyginięcie)[5].
Przypisy
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Nagosz wapienny: Brief Summary
(
polonèis
)
fornì da wikipedia POL
Nagosz wapienny (Gymnostomum calcareum Nees & Hornsch.) – gatunek mchu należący do rodziny płoniwowatych (Pottiaceae Schimp.).
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Gymnostomum calcareum
(
vietnamèis
)
fornì da wikipedia VI
Gymnostomum calcareum là một loài rêu trong họ Pottiaceae. Loài này được Nees & Hornsch. mô tả khoa học đầu tiên năm 1823.[1]
Chú thích
Liên kết ngoài
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Gymnostomum calcareum: Brief Summary
(
vietnamèis
)
fornì da wikipedia VI
Gymnostomum calcareum là một loài rêu trong họ Pottiaceae. Loài này được Nees & Hornsch. mô tả khoa học đầu tiên năm 1823.
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- Wikipedia tác giả và biên tập viên