Amphineuron immersum

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Amphineuron immersum

Distribution

Asia-Temperate:, Hainan (Hainan present) Asia-Tropical:, Assam (Assam present) New Caledonia: present New Hebrides: present southern Thailand: present to 16° S: present
Assam; Hainan; southern Thailand; throughout Malesia; Queensland (to 16° S); New Hebrides, New Caledonia.

Notes

All the living plants observed by me have an erect caudex, but Backer & Posthumus State "wortelstok kruipend". Eryl Smith 2432, from Timor, is a small plant with definitely creeping caudex; it might be a hybrid with A. opulentum. The types of Dryopteris diversifolia v.A.v.R. and D. besukiensis v.A.v.R. are small plants, perhaps stunted owing to exposure. There is much variation in the development of acicular hairs and of small yellowish glandular hairs on the lower surface of pinnae. The types of both Lastrea caudiculata Presl and L. verrucosa Presl have acicular hairs, that of Thelypteris subimmersa Ching has none, but the published description gives no other character which would distinguish it from the type of Aspidium immersum Bl. I know of no other record of this species in China.

Citation

v.A.v.R., Handb. 1908: 188
v.A.v.R., Handb. 1908: 189
Copel., Fern Fl. Philip. 1960: 327
v.A.v.R., Handb. 1917: 156
Moore, Handb. 1883: 234
Holttum - in Novit. Bot. Univ. Carol. Prag. 1969: 35
Backer & Posth., Varenfl. Java. 1939: 39
Holttum - in Rev. Fl. Malaya. 1955: 243
Holttum - in Blumea. 1977: 211
Bedd., Ferns Br. India. 1867: t. 252
Racib. - in Fl. Btzg. 1898: 169
Copel., Fern Fl. Philip. 1960: 327