Wikipedia
Wild silks have been known and used in many countries from early times, although the scale of production is far smaller than that from cultivated silkworms.
Usage examples of "wild silk".
He wore the after-shave she had given him am the cream-coloured wild silk suit which she had once remarked ai favourably, with his airforce scarf in the open neck of his blue shirt All the children were packed off to Rhodes Hill, into Centaine' care for the weekend, and he sent the chauffeur in the Rolls to fetc Tara from Molly Broadhurst's home where she was staying.
From the bottom of the suitcase was taken a gown of emerald-green wild silk, which, held up and shaken free of its creases, revealed itself as a gold-embroidered caftan, rich and voluptuous as something from the Arabian Nights.