Sphaeropteris intermedia (Cultivated- USA)

Sphaeropteris intermedia (Mett.) R. M. Tryon (syn: Alsophila francii Rosenst.; Alsophila intermedia Mett.; Cyathea francii (Rosenst.) Domin; Cyathea intermedia (Mett.) Copel.);

New Caledonia as per Catalogue of Life;

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Palm Tree for ID : Conservatory : Atlanta Botanical Garden : Atlanta, Georgia : 28NOV18 : AK-28 : 7 posts by 3 authors. Attachments (3)
A palm seen inside the Conservatory last month.
Kindly help in id.

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i think tree fern; Cyathea sp.

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Quite right to send it to me – of course “that ain’t no palm”, but a tree-fern! Cyathea species do, however, need a close up of the underneath of a pinnule to show hairs, small scales etc. My guess is it might be C. spinulosa, but that is itself a species-pair with a closely related cryptic second species – so the close-up is needed.

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References:
Catalogue of Life  The Plant List Ver.1.1 (Cyathea intermedia (Mett.) Copel.) Tropicos  IPNI