A conspectus of the native and naturalized species of Nephrolepis (Nephrolepidaceae) in the world Hovenkamp PH Miyamoto F Blumea 2005 50 279 322 Hovenkamp PH & Miyamoto F, 2005 Hovenkamp PH & Miyamoto F 2005 Polypodiopsida Nephrolepidaceae Nephrolepis Plantae Polypodiales 33 312 Tracheophyta species hippocrepicis hybr. nov.  Planta hybrida, differt ab N. cordifolia squamis stipitismargine ciliatis lineo-lanceolatis; ab   N. biserratapinnistriangularis, supernis latis auriculatis, indusis lunulatisvel reniformis.  Sporae abnormaleset 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 cordifoliaand  N. biserrata   . Thishybrid is very similar to  N. exaltata,and one specimen was in fact identifed by Naumanas such. However,  N. exaltatadoes not occur in Asia. Nephrolepis xhippocrepiciscan be distinguished from  N. biserrataby the distinctly triangular pinnae with auriculate acroscopic base, from N. cordifoliaby 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(    UmapornIntern s.n. 1999, Doi  Sutepnear  PupingPalace, L).  Specimens examined:  JAPAN. Ryukyu Islands:    OkinawaIsland,  YonaExp. 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);    Iwatsukiet al. s.n.( KYO);    MiyakoIsland,   Ohgami:  Miyagiet al. s.n.( KYO). 923901066 1985-03-05 TUAT, B, BISH, BM, K, MICH, NY, P, TAI Miyamoto & Nakayama s. n. Thailand Ryukyu Islands, 33 312 Ryukyu Islands, Typus 923901048 2005-01-01 2005-12-31 2005-01-01 L Umaporn Intern s. n. Thailand Doi Sutep near Puping Palace 34 313 923901059 1985-03-05 Miyamoto & Nakayama s. n. Japan 100 - 200 m: Kunigamison Yona Exp. Forest of Ryukyu Univ. Yona 34 313 Okinawa Island, 923901050 2005-01-01 2005-12-31 2005-01-01 Miyamoto & Nakayama 1407 Japan 34 313 Okinawa Island, 923901047 2005-01-01 2005-12-31 2005-01-01 Miyamoto & Nakayama 1407 Japan 34 313 Okinawa Island, 923901055 2005-01-01 2005-12-31 2005-01-01 Miyamoto & Nakayama 1407 Japan 34 313 Okinawa Island, 923901051 2005-01-01 2005-12-31 2005-01-01 Miyamoto & Nakayama 1407 Japan 34 313 Okinawa Island, 923901058 2005-01-01 2005-12-31 2005-01-01 Miyamoto & Nakayama 1407 Japan 34 313 Okinawa Island, 923901074 2005-01-01 2005-12-31 2005-01-01 TUAT Miyamoto & Nakayama 1407 Japan 34 313 Okinawa Island, 923901053 2005-01-01 2005-12-31 2005-01-01 KYO Iwatsuki et al. s. n. Japan 34 313 Okinawa Island, 923901065 2005-01-01 2005-12-31 2005-01-01 KYO Miyagi et al. s. n. Japan Ohgami Ohgami 34 313 Miyako Island,