sheathlike

“• Botany & Zoology any sheathlike structure, esp. a sheath formed around a stem by the base of a leaf.”

Waldo Jaquith - The George Allen Merriam-Webster Dictionary (Abridged)

“He had never before seen her in that odd, sheathlike garment of silver-grey velvet.”

Blue Aloes Stories of South Africa

“Afterwards, sometimes figures were slim and encased in sheathlike draperies, sometimes folds rippled about feet, "fullness" crept here or there or disappeared altogether, trains grew longer or shorter or wider or narrower, cashmeres, grosgrain silks and heavy satins were suddenly gone and chiffon wreathed itself about the world and took possession of it.”

The Head of the House of Coombe

“The Lady Downstairs, in a sheathlike sparkling dress, and only”

The Head of the House of Coombe