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Rubyung (Pyrrosia longifolia)

Dlium Rubyung (Pyrrosia longifolia)

Rubyung (Pyrrosia longifolia) is a species in the Polypodiaceae, an epiphytic fern that grows on large trees, forming dense colonies and covering the surface of tree trunks, growing wild in the shade or under the shade of the forest canopy, sometimes in open areas, plantations and unused land. taken care of.

P. longifolia has roots with fibrous rhizomes. The stems are in the form of rhizomes that grow creepingly, long, dark brown, 3 mm in diameter and densely packed. Ptiolus are blackish brown, 10-15 mm long, 4 mm in diameter and have trichomes.





The leaves are green, thick, long linear, with flat edges, oblong-shaped sterile and wide in the middle, fertile have rounded tips, up to 110 cm long, up to 3 cm wide, the upper surface is smooth and shiny.

The sorus is attached to the lower surface, is round, clustered on some of the upper leaves and is brown in color. The scales on the rhizoma are oblong-ovate, 2-3 mm long, dark brown in the middle, flat edges, yellowish white at the edges and have more than 100 hairs. The trichomes on the ptiolus and sterile leaves are stellate, 8-9 arms and white in color.

TAXON

Kingdom: Plantae
Phylum: Tracheophyta
Class: Polypodiopsida
Subclass: Polypodiidae
Order: Polypodiales
Suborder: Polypodiineae
Family: Polypodiaceae
Subfamily: Platycerioideae
Genus: Pyrrosia Mirb. in J.B.A.M.de Lamarck & C.F.B.de Mirbel, Hist. Nat. Vég. Cl. Fam. 3: 471 (1802)
Species: Pyrrosia longifolia (Burm.f.) C.V.Morton in J. Washington Acad. Sci. 36: 168 (1946)

HOMOTYPIC SYNONYMS

Candollea longifolia (Burm.f.) Mirb. in J.B.A.M.de Lamarck & C.F.B.de Mirbel, Hist. Nat. Vég. Cl. Fam. 5: 88 (1802)
Cyclophorus longifolius (Burm.f.) Desv. in Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 5: 301 (1811)
Niphobolus longifolius (Burm.f.) Spreng. in Syst. Veg., ed. 16. 4(1): 45 (1827) Acrostichum longifolium Burm.f. in Fl. Indica: 228 (1768)

HETEROTYPIC SYNONYMS

Cyclophorus acrostichoides (G.Forst.) C.Presl in Abh. Königl. Böhm. Ges. Wiss., ser. 5, 6: 130 (1851)
Cyclophorus acrostichoides var. fissus (Blume) Bonap. in Notes Ptéridol. 7: 125 (1918)
Cyclophorus cinnamomeus Alderw. in Bull. Jard. Bot. Buitenzorg, sér. 3, 5: 192 (1922)
Cyclophorus induratus Christ in J. Bot. (Morot), sér. 2, 1: 238, 271 (1908)
Cyclophorus macropodus (Baker) C.Chr. in Index Filic.: 199 (1905)
Cyclophorus scolopendrium Desv. in Mém. Soc. Linn. Paris 6: 225 (1827)
Cyclophorus valleculosus Alderw. in Bull. Jard. Bot. Buitenzorg, sér. 2, 7: 10 (1912)
Gyrosorium fissum (Blume) C.Presl (1851)
Niphobolus acrostichoides (G.Forst.) Bedd. in Ferns Brit. India: t. 81 (1865)
Niphobolus fissus Blume in Enum. Pl. Javae 2: 106 (1828)
Niphobolus puberulus Blume (1828)
Niphobolus scolopendrium (Desv.) T.Moore in Index Fil.: 276 (1861)
Polypodium acrostichoides G.Forst. in Fl. Ins. Austr.: 81 (1786)
Polypodium fissum (Blume) Baker in W.J.Hooker & J.G.Baker, Syn. Fil.: 351 (1867)
Polypodium furfuraceum Wall. in Numer. List: n.° 278 (1829)
Polypodium macropodum Baker in J. Linn. Soc., Bot. 15: 108 (1876)
Pyrrosia acrostichoides (G.Forst.) Ching in Bull. Chin. Bot. Soc. 1: 69 (1935)
Pyrrosia coccideisquamata Gilli in Ann. Naturhist. Mus. Wien 81: 26 (1978)
Pyrrosia fissa (Blume) Mehra in Ferns Mussoorie: 26 (1939)
Pyrrosia macropoda (Baker) Ching (1935)
Acrostichum bicolor Cav. in Anales Hist. Nat. 1: 103 (1802)

PUBLICATIONS

Chen, C.-W. & al. (2022). An annotated checklist of lycophytes and ferns of the Solomon islands. The Fern Gazette 21: 292-419.

Plunkett, G.M., Ranker, T.A., Sam, C. & Balick, M.J. (2022). Towards a checklist of the vascular flora of Vanuatu. Candollea 77: 105-118.

Roskov Y. & al. (eds.) (2018). World Ferns: Checklist of Ferns and Lycophytes of the World. Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.

VERNACULAR NAME

English: Rubyung, Long-leaved Pyrrosia, Long-leved Felt Fern
Indonesian: Rubyung
Java: Rubyung
Sunda: Rubyung
Thai: เฟิร์นสะโมง

Aryo Bandoro
Dlium TheDlium
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