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Comments ( англиски )

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This very remarkable plant is becoming extremely rare in Florida.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description ( англиски )

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Roots tan, to 15 per plant, 1--1.5 mm diam., proliferating in humus or underneath palm leaf bases. Stems 0.5--1.5 cm, covered near apex with dense tuft of white to light brown, multicellular hairs to 7 mm. Trophophore blades green, shiny, to 45 × 30 cm, proximal margins diverging 90°--150° from stalk, with up to 7 rounded to mostly linear, acute lobes; venation complex-reticulate, very coarse, veinlets included in (usually elongate) very large major areoles to 35 × 8 mm, veinlets free or sometimes forming individual secondary areoles; blades firm, herbaceous. Trophophore stalk well defined, 1--2.5 times as long as trophophore blade. Sporophores single and central only on youngest or smallest leaves, normally to 10 per leaf, arising closely spaced from both sides of base of trophophore blade and top of stalk, sporangial clusters 1--7cm × 2.5--3 mm, apiculum absent.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Distribution ( англиски )

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Fla.; Mexico; West Indies; Central America; South America; disjunct in Asia in s Vietnam; Africa in Madagascar, Seychelles, and Réunion.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Habitat ( англиски )

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Evergreen. Among leaf bases on palmetto trunks [ Serenoa repens (Bartram) Small], mainly in hammocks and swamps; 0--50m.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Synonym ( англиски )

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Ophioglossum palmatum Linnaeus, Sp. Pl. 2: 1063. 1753
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
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Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Comprehensive Description ( англиски )

добавил North American Flora
Cheiroglossa palmata (ly.) Presl, Abh. Bohm. Ges
Wiss. V. 4 : 317. 1845.
Opkioglossum palmatum L. Sp. PI. 1062. 1753.
Rhizome 8-25 mm. long, 8-15 mm. thick, clothed with fine, pale, hairlike scales; leaves 20-30 cm. long, spreading and pendent, the commonstalk 6-20 cm. long, flattened, the lamina obdeltoid, 10-20 cm. long, 5-25 cm. broad, digitately divided often nearly to the base into 2-10 tapering lobes 2-22 cm. long, rarely simple ; venation reticulate, the major areolae elongate, angular, irregularly hexagonal, usually including several smaller areolae and an occasional free veinlet ; sporophyls 1-16 on each leaf, 1-7 cm. long, borne along the margins of the upper part of the commonstalk and the base of the lamina ; sporangia 8-60-jugate ; spores yellow, .045-.06 mm. thick, very finely pitted and verrucose.
Type locality : Santo Domingo.
Distribution : Kpiphytic ; from southeastern Florida throughout the West Indies to Mexico and Brazil.
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Lucien Marcus Underwood, Ralph Curtiss BenedictWilliam Ralph Maxon. 1909. OPHIOGLOSSALES-FILICALES; OPHIOGLOSSACEAE, MARATTIACEAE, OSMUNDACEAE, CERATOPTERIDACEAE, SCHIZAEACEAE, GLEICHENIACEAE, CYATHEACEAE (pars). North American flora. vol 16(1). New York Botanical Garden, New York, NY
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North American Flora

Cheiroglossa palmata ( англиски )

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Cheiroglossa palmata, synonyms Ophioderma palmatum and Ophioglossum palmatum, variously known as hand fern, dwarf staghorn, or hand tongue, is an epiphytic or terrestrial fern. As an epiphyte it grows in old leaf bases of the cabbage palmetto (Sabal palm).

Description

The leaves are palmately lobed and roughly shaped like a hand. They grow up to 30 cm wide and the margins are entire (no serration). The fertile fronds are a set of small tapering sporophores that bear the spores. There are several to many at the base of each leaf blade. On the sporophores are the sporangial clusters with sporangia in two rows, all embedded in compact, linear spikes. The main areoles large, usually more than 30 mm. The pale yellowish-brown roots are dichotomous. The gametophytes are brown to white, cylindric, and repeatedly branched.

Taxonomy

The species was first described by Carl Linnaeus in 1753, as Ophioglossum palmatum.[2] The genus Ophioglossum has been circumscribed in different ways, and Ophioglossum palmatum has been placed in the genus Ophioderma as well as Cheiroglossa.[3] The Pteridophyte Phylogeny Group classification of 2016 (PPG I) uses Cheiroglossa.[4] Whatever the genus, the species is placed in the family Ophioglossaceae of the order Ophioglossales.[4]

Distribution

This plant is found worldwide, but in the United States, it is restricted to the far southeast, primarily Florida. It has become rare in Florida due to overcollecting and extensive drainage of natural wetlands from development and water diversion projects. It is reported to not survive cultivation.

References

  1. ^ a b Hassler, M. (November 2018), "Species Details: Cheiroglossa palmata (L.) Presl", World Ferns: Checklist of Ferns and Lycophytes of the World, The Species 2000 & ITIS Catalogue of Life, retrieved 2019-08-08
  2. ^ "Ophioglossum palmatum L.", The International Plant Names Index, retrieved 2019-08-08
  3. ^ "Ophioglossum palmatum L.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-08-08
  4. ^ a b PPG I (2016), "A community-derived classification for extant lycophytes and ferns", Journal of Systematics and Evolution, 54 (6): 563–603, doi:10.1111/jse.12229
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Cheiroglossa palmata: Brief Summary ( англиски )

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Cheiroglossa palmata, synonyms Ophioderma palmatum and Ophioglossum palmatum, variously known as hand fern, dwarf staghorn, or hand tongue, is an epiphytic or terrestrial fern. As an epiphyte it grows in old leaf bases of the cabbage palmetto (Sabal palm).

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Cheiroglossa palmata ( холандски; фламански )

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Cheiroglossa palmata is een varen uit de addertongfamilie (Ophioglossaceae). De soort is zeldzaam, maar wijd verspreid in tropische delen van Noord-, Midden- en Zuid-Amerika, Afrika en Zuidoost-Azië.

Cheiroglossa palmata is anders dan de meeste Ophioglossales, een epifytische varen die vooral in palmen groeit.

Naamgeving en etymologie

  • Synoniem: Ophioglossum palmatum L. 1753, Ophioderma palmata (L.) Nakai
  • Engels: Hand fern, Dwarf staghorn, Hand tongue

De botanische naam Cheiroglossa is een samenstelling van Oudgrieks χείρ, cheir (hand) en γλῶσσα, glōssa (tong), naar de handvormig gelobde trofofoor. De soortaanduiding palmata betekent 'lijkend op een palm (van een hand)', en slaat eveneens op de vorm van het blad.

Kenmerken

Cheiroglossa palmata is een epifytische varen met dunne, vertakte wortels die in humus of onder de bladbasis van de palm wortelen. Elke plant bestaat uit twee componenten, een gesteelde, onvruchtbare, bladvormige trofofoor en meerdere (tot tien) vruchtbare sporoforen, die ingeplant zijn op de bladsteel of aan de basis van het steriele blad.

De trofofoor is tot 45 cm lang, stevig, glanzend groen, gesteeld, breed wigvormig, handdelig ingesneden met tot 7 ellips- tot lijnvormige lobben met spitse top en grove, netvormige nerven. De bladsteel is tot 1,5 cm dik, tot tweemaal langer dan het blad, dun en afhangend, aan de top dicht bezet met lichte haren.

De sporoforen zijn kort gesteelde, ongedeelde lancet- tot lijnvormige sporenaren, de sporenhoopjes in twee rijen gescheiden door een diepe gleuf.

Habitat

Cheiroglossa palmata is een epifytische plant die vooral groeit op de stam van de palm Serenoa repens en voorkomt in moerassen en moerasbossen (hammocks).

Voorkomen

De soort heeft een groot verspreidingsgebied, vooral in tropische streken van Noord-Amerika (Florida, Mexico, de Caraïben), Midden- en Zuid-Amerika. Verder op Madagaskar, de Seychellen en Reunion, en in Vietnam.

Bronnen, noten en/of referenties
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Cheiroglossa palmata: Brief Summary ( холандски; фламански )

добавил wikipedia NL

Cheiroglossa palmata is een varen uit de addertongfamilie (Ophioglossaceae). De soort is zeldzaam, maar wijd verspreid in tropische delen van Noord-, Midden- en Zuid-Amerika, Afrika en Zuidoost-Azië.

Cheiroglossa palmata is anders dan de meeste Ophioglossales, een epifytische varen die vooral in palmen groeit.

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Cheiroglossa palmata ( виетнамски )

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Cheiroglossa palmata là một loài dương xỉ trong họ Ophioglossaceae. Loài này được L. C. Presl mô tả khoa học đầu tiên năm 1845.[1]

Chú thích

  1. ^ The Plant List (2010). Cheiroglossa palmata. Truy cập ngày 28 tháng 5 năm 2014.

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Cheiroglossa palmata: Brief Summary ( виетнамски )

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Cheiroglossa palmata là một loài dương xỉ trong họ Ophioglossaceae. Loài này được L. C. Presl mô tả khoa học đầu tiên năm 1845.

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