Nephrolepis x hippocrepicis Miyam.,, 2005

Hovenkamp PH & Miyamoto F, 2005, A conspectus of the native and naturalized species of Nephrolepis (Nephrolepidaceae) in the world, Blumea 50, pp. 279-322 : 312-313

23. Nephrolepis x hippocrepicis Miyam., hybr. nov.

Planta hybrida, differt ab N. cordifolia squamis stipitis margine ciliatis lineo-lanceolatis; ab N. biserrata pinnis triangularis, supernis latis auriculatis, indusis lunulatis vel reniformis. Sporae abnormales et abortivae. - Typus: Miyamoto & Nakayama s.n. (holo TUAT; iso B, BISH, BM, K, MICH, NY, P, TAI), Ryukyu Islands, 5 March 1985.

Distribution - Ryukyu Islands, possibly elsewhere where the two putative parents occur together.

Note - Putative hybrid between Nephrolepis cordifolia and N. biserrata . This hybrid is very similar to N. exaltata , and one specimen was in fact identifed by Nauman as such. However, N. exaltata does not occur in Asia. Nephrolepis x hippocrepicis can be distinguished from N. biserrata by the distinctly triangular pinnae with auriculate acroscopic base, from N. cordifolia by the narrower sinus of the indusia and the ciliate stipe scales. The spores of all specimens examined are abnormal. A specimen with a somewhat similar morphology was collected in Thailand ( Umaporn Intern s.n. 1999, Doi Sutep near Puping Palace, L).

Specimens examined:

JAPAN. Ryukyu Islands: Okinawa Island, Yona Exp. Forest of Ryukyu Univ. Yona, Kunigamison , 100-200 m: Miyamoto & Nakayama s.n., 5 March 1985, Miyamoto & Nakayama 1407, 1408 , 1409 , 1412, 1413, 1414 ( TUAT); Iwatsuki et al. s.n. ( KYO); Miyako Island, Ohgami: Miyagi et al. s.n. ( KYO).