# Dasygrammitis > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Dasygrammitis > Markdown URL: https://mediated.wiki/source/Dasygrammitis.md > Source: https://en.wikipedia.org/wiki/Dasygrammitis > Source revision: 1317525211 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Genus of ferns}} {{Automatic taxobox | image = | taxon = Dasygrammitis | authority = Parris | type_species = ''[Dasygrammitis mollicoma](/source/Dasygrammitis_mollicoma)'' | type_species_authority = ([Nees](/source/Christian_Gottfried_Daniel_Nees_von_Esenbeck) & [Blume](/source/Carl_Ludwig_Blume)) Parris }} '''''Dasygrammitis''''' is a [genus](/source/genus) of [fern](/source/fern)s in the family [Polypodiaceae](/source/Polypodiaceae), subfamily [Grammitidoideae](/source/Grammitidoideae), according to the [Pteridophyte Phylogeny Group](/source/Pteridophyte_Phylogeny_Group) classification of 2016 (PPG I). It is known from [Sri Lanka](/source/Sri_Lanka) through southeast Asia and the Philippines to Polynesia. ==Description== The rhizomes are radially symmetric (without distinct upper and lower surfaces) and bear whorls of [stipe](/source/stipe_(botany))s, which lack a joint at the point of attachment. The rhizome scales are red-brown, of uniform color, and usually glossy. They have unbranched, red-brown hairs on their edges.{{cite journal |first=Barbara S. |last=Parris |title=Five new genera and three new species of Grammitidaceae (Filicales) and the re-establishment of ''Oreogrammitis'' |journal=Gardens' Bulletin Singapore |volume=58 |issue=2 |pages=233–274 |year=2007 |url=https://www.sbg.org.sg/images/4_4_Research_Gardens_Bulletin/4_4_58_2_pdf_Vol_58_Part%202_2007/4.4.58.2.05_y2007_V58_P2_GBS_pg.233.pdf |access-date=2016-07-30 |archive-date=2016-08-07 |archive-url=https://web.archive.org/web/20160807035954/https://www.sbg.org.sg/images/4_4_Research_Gardens_Bulletin/4_4_58_2_pdf_Vol_58_Part%202_2007/4.4.58.2.05_y2007_V58_P2_GBS_pg.233.pdf |url-status=dead }} Hairs, where present, are unbranched and branched, and brown in color. The leaf blades are usually [pinnate](/source/pinnate) in cutting, rarely [pinnatifid](/source/pinnatifid) or bipinnatifid, bearing free veins which lack [hydathode](/source/hydathode)s at their terminus. [Sori](/source/Sorus) are borne in two rows beneath pinnae or lobes. The sori are circular to elliptic in shape; the [sporangia](/source/sporangia) either lack hairs or have one to two red-brown hairs. ==Taxonomy== The genus was first described by Barbara Parris in 2007 to receive some of the species of the genus ''[Grammitis](/source/Grammitis)'', which as then circumscribed was artificial and contained a number of disparate lineages. The name "''Dasygrammitis''" means "shaggy ''Grammitis''", referring to the shaggy hairs often present on the frond in this group of former ''Grammitis'' species. Parris initially placed six species in the genus. A phylogenetic study of the grammitids found that ''Dasygrammitis'' was sister to a clade consisting of ''[Calymmodon](/source/Calymmodon)'', ''[Micropolypodium](/source/Micropolypodium)'', ''[Scleroglossum](/source/Scleroglossum)'', ''[Tomophyllum](/source/Tomophyllum)'', and ''[Xiphopterella](/source/Xiphopterella)''.{{cite journal |first1=Michael A. |last1=Sundue |first2=Barbara S. |last2=Parris |first3=Tom A. |last3=Ranker |first4=Alan R. |last4=Smith |first5=Erin L. |last5=Fujimoto |first6=Delia |last6=Zamora-Crosby |first7=Clifford W. |last7=Morden |first8=Wen-Liang |last8=Chiou |first9=Cheng-Wei |last9=Chen |first10=Germinal |last10=Rouhan |first11=Regina Y. |last11=Hirai |first12=Jefferson |last12=Prado |title=Global phylogeny and biogeography of grammitid ferns (Polypodiaceae) |journal=[Molecular Genetics and Evolution](/source/Molecular_Genetics_and_Evolution) |volume=81 |pages=195–206 |year=2014 |doi=10.1016/j.ympev.2014.08.017 |pmid=25173566 |s2cid=21098484 |url=https://www.researchgate.net/publication/265176631}} These six genera share a radially symmetric rhizome, which may be a [synapomorphy](/source/synapomorphy) for this clade (although the trait appears in other grammitid taxa, probably independently). ===Species=== {{As of|2025|October}}, the ''Checklist of Ferns and Lycophytes of the World'' accepted the following eight species: *''[Dasygrammitis brevivenosa](/source/Dasygrammitis_brevivenosa)'' (Alderw.) Parris *''[Dasygrammitis crassifrons](/source/Dasygrammitis_crassifrons)'' (Baker) Parris *''[Dasygrammitis fuscata](/source/Dasygrammitis_fuscata)'' (Blume) Parris *''Dasygrammitis kinabaluensis'' Parris, sp. ined. *''[Dasygrammitis malaccana](/source/Dasygrammitis_malaccana)'' (Baker) Parris *''[Dasygrammitis mollicoma](/source/Dasygrammitis_mollicoma)'' (Nees & Blume) Parris *''[Dasygrammitis purpurascens](/source/Dasygrammitis_purpurascens)'' (Nadeaud) Parris *''Dasygrammitis seramensis'' Parris, sp. ined. ==References== {{Reflist|refs= {{cite WF |taxon=Dasygrammitis |access-date=2025-10-18}} {{citation |mode=cs1|author=PPG I |year=2016 |title=A community-derived classification for extant lycophytes and ferns |journal=[Journal of Systematics and Evolution](/source/Journal_of_Systematics_and_Evolution) |volume=54 |issue=6 |pages=563–603 |doi=10.1111/jse.12229|s2cid=39980610 |doi-access=free}} }} {{Taxonbar|from=Q17197627}} Category:Polypodiaceae Category:Fern genera --- Adapted from the Wikipedia article [Dasygrammitis](https://en.wikipedia.org/wiki/Dasygrammitis) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Dasygrammitis?action=history)). 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