Comments
provided by eFloras
The leaf margins in Ephemerum serratum vary markedly, from barely serrate to long spinose. In general, plants from eastern North America tend to be more strongly serrate than plants from California and Oregon, although barely serrate plants from the east as well as distinctly serrate plants from the west have been seen. Mature capsules frequently persist with only the remnants of leaves remaining, the distal portions of the leaves apparently eroded away. Rarely, thick-walled, elongate, brown structures occur on the protonemata and they may serve as diaspores.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Plants less than 2 mm, gregarious in persistent matted protonemata. Leaves linear-lanceolate to ovate-lanceolate, sometimes narrowed from distinct shoulders, 1-2.4 × 0.17-0.3 mm; margins usually coarsely and irregularly serrate distal to the proximal third, often with spines, but varying to scarcely serrate; apex tapering gradually to a sharply pointed acumen, absent papillae; costa usually absent, but sometimes suggested by a few thick-walled cells or an obscure double layer of undifferentiated cells, smooth; areolation lax proximally and somewhat firm distally; median laminal cells in vertical rows, smooth; distal laminal cells smooth. Capsule with columella resorbed before meiosis; stomates only at the base. Spores spherical or reniform, 55-106 × 27-75 µm.
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Synonym
provided by eFloras
Phascum serratum Hedwig, Sp. Musc. Frond., 23. 1801; Ephemerum serratum var. minutissimum (Lindberg) Grout
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Jętniczek piłkowany
(
Polish
)
provided by wikipedia POL
Systematyka[1] Domena eukarionty Królestwo rośliny Gromada mchy Klasa prątniki Rząd płoniwowce Rodzina płoniwowate Rodzaj jętniczek Gatunek jętniczek piłkowany
Nazwa systematyczna Ephemerum serratum (Schreb. ex
Hedw.)
HampeFlora 20: 285 1837.[2] Jętniczek piłkowany (Ephemerum serratum (Schreb. ex Hedw.) Hampe) – gatunek mchu należący do rodziny płoniwowatych (Pottiaceae Schimp.).
Rozmieszczenie geograficzne
Występuje w Ameryce Północnej (Kanada, Stany Zjednoczone), Brazylii, Europie, Chinach, Afryce południowej i Nowej Zelandii[3].
Morfologia
- Gametofit
- Rośliny o wysokości poniżej 2 mm. Listki podłużnie do jajowato lancetowate, o rozmiarach 1–2,4 mm na 0,17–0,3 mm. Żeberka zwykle brak lub śladowe[3].
- Sporofit
-
Zarodniki kuliste lub nerkowate, o rozmiarach 55–106 na 27–75 µm[3].
Biologia i ekologia
Puszki zarodni dojrzewają przez cały rok, najwięcej jesienią. Rośnie na łąkach, pastwiskach i wysychającej glebie. Występuje na wysokościach od 5 do 1150 m n.p.m.[3]
Systematyka i nazewnictwo
Synonimy według The Plant List[2]: Phascum serratum Schreb. ex Hedw., Phascum stoloniferum Dicks. ex Hedw.
Odmiany[2]:
-
Ephemerum serratum var. praecox A.W.H. Walther & Molendo
-
Ephemerum serratum var. rutheanum (Schimp.) Jur.
-
Ephemerum serratum var. subulatum Boulay
Przypisy
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Jętniczek piłkowany: Brief Summary
(
Polish
)
provided by wikipedia POL
Jętniczek piłkowany (Ephemerum serratum (Schreb. ex Hedw.) Hampe) – gatunek mchu należący do rodziny płoniwowatych (Pottiaceae Schimp.).
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Ephemerum serratum: Brief Summary
(
Vietnamese
)
provided by wikipedia VI
Ephemerum serratum là một loài rêu trong họ Ephemeraceae. Loài này được Schreb. ex Hedw. Hampe mô tả khoa học đầu tiên năm 1837.
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