Gymnosphaera dimorpha
species of tree fern
Gymnosphaera dimorpha, synonyms Alsophila dimorpha and Cyathea dimorpha, is a species of tree fern native to central and southeastern Sulawesi, where it grows at an altitude of 120–1700 m. The trunk is erect and 3–4 m tall. Fronds are pinnate to bipinnate and up to 2 m long. Fertile pinnules are reduced in size. The stipe is short and bears basal scales. The scales are narrow, glossy, dark and have pale edges. Indusia are absent.
The specific epithet dimorpha refers to the strong morphological differences between fertile and sterile pinnules. Sterile pinnules are larger, while fertile pinnules are narrow, reduced and lobed.
The public source identifies “Gymnosphaera dimorpha” as species of tree fern. This brief keeps that definition visible, then builds a research path around Gymnosphaera, dimorpha and species.
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The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Dec 27, 2025. The linked authority identifier is Q38228504. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1700.
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This entry incorporates text from “Gymnosphaera dimorpha” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.