Tectaria labrusca
Content
Distribution
Asia-Tropical: Borneo present (Kalimantan present, Sarawak present)
Malesia: Borneo (Sarawak and Kalimantan).
Taxonomy
Hooker received two collections of specimens from limestone in Sarawak made by Thomas Lobb in 1857. They are mounted on separate sheets and evidentiy Lobb recognized them as distinct. But Hooker included both in one species; his t. 285B shows a frond from each sheet. He wrote the name Polypodium labrusca on one sheet only; which is now marked as lectotype; the specimens on the other sheet represent T. brooksii. Hooker omitted reference to hairs on the fronds, but Baker (1868) stated that the fronds are glabrous, thus misleading Raciborski who gave the new name Nephrodium vitis to a specimen of the true T. labrusca and was copied by Alderwerelt. See further comment under T. brooksii.
Probable hybrid: M. Kato et al B5492 from Kalimantan has almost entire fronds, as in T. brooksii and shorter and more sparse hairs on the lower surface than in T. labrusca; it looks like a hybrid. The two species grow together, as noted by Brooks.
Probable hybrid: M. Kato et al B5492 from Kalimantan has almost entire fronds, as in T. brooksii and shorter and more sparse hairs on the lower surface than in T. labrusca; it looks like a hybrid. The two species grow together, as noted by Brooks.