Diplazium tomentosum Blume (1828: 192)

Pongkai, Puttamon, Zhang, Li-Bing, Boonkerd, Thaweesakdi & Pollawatn, Rossarin, 2023, Revision of the fern genus Diplazium (Polypodiales: Athyriaceae) in Thailand, Phytotaxa 631 (1), pp. 1-69 : 64

30. Diplazium tomentosum Blume (1828: 192) . Fig. 37 .

Type : INDONESIA. Blume s.n. (holotype L0051073 !) .

Plants terrestrial. Stems erect, 0.4–1.0 cm diameter, bearing wiry roots, apex scaly; scales about 1.0 × 0.3 cm, narrowly-lanceolate with long-tail apex, concolorous dark brown, margin entire. Fronds 35–52 cm, pinnate; petioles 15–25 cm, 2–3 mm diameters, tomentose, brown to nearly black, lower portion scaly. Laminae 20–27 × 8–13 cm, narrowly-deltoid in outline, deep green, iridescent blue when living; rachis densely covered with short multicellular hairs with brown septa; pinnae 25–30 pairs, terminal pinna not distinct, lateral pinnae gradually becoming smaller upwards, lower pinnae largest, about 5 × 1 cm, linear-lanceolate, sessile or shortly stalked, upper pinnae sessile, lower and middle pinnae shortly stalked, basal pairs more or less reflexed, acroscopic base auricled, apex acute, base subtruncate, margin serrate to lobe; lobes about 5 × 3 mm, 1/3–2/3 way to costa, oblique, oblong, apex acute; veins pinnate, veinlets simple or forked. Sori 2–3 mm, elongate along vein, on basal acroscopic veinlets, indusiate; indusia narrowly-oblong, crescentic, persistent. Spores monolete, 30.0–34.5 × 24.5–26.0 μm, bilateral, concavo-convex to plano-convex, perispore present; ornamentation: prominent wing folds.

Thailand: —NORTHERN: Nan (Doi Phuka); EASTERN: Nakhon Ratchasima; CENTRAL: Nakhon Nayok (Khao Yai), Prachinburi (Khao Yai); SOUTH-EASTERN: Chanthaburi (Khao Sabap, Khao Sip-ha Chan), Trat (Bo Rai), Prachin Buri; PENINSULAR: Chimphon (Lang Suan, Patoh), Surat Thani (Khao Nom Sao), Krabi (Phanom Bencha), Nakhon Si Thammarat (Groong Ching waterfalls, Khao Luang, Khao Nan,), Trang (Khao Sung), Songkhla (Ton Nga Chang waterfalls), Narathiwat (Phu Khao Thong, Sukirin, Waeng).

Distribution: — Myanmar, Veitnam, Malaysia, Philippines, Brunei, Indonesia and Singapore.

Ecology: —On mountain slopes in moist, shady evergreen forests at 200–1,250 m elev.

Specimens Examined:— THAILAND. Chumphon,Lang Suan, A.F. G. Kerr 12015 (BK, BM); Krabi, A.F. G. Kerr 18673 (BM, BK); Nakhon Ratchasima, A.F. G. kerr 9511 (BK); Nakhon Si Thammarat, Khao Luang, B. Ohusing et al. 3 (PSU); Trung, C. Apasutaya 127 (BCU); Songkhla, Ton Nga Chang waterfalls, C. Kraithep 23 (PSU); Nakhon Si Thammarat, Khao Luang, C.F. van Beusekom & C. Phengklai 806 (L); Nakhon Si Thammarat, Khao Luang, E. Hennipman 3799A (L); ibis., E. Hennipman 3818 (B, BM, L); Prachinburi, Khao Yai, E. Hennipman 3988 (L); Nakorn Nayok, Khao Yai, J.F. Maxwell 01-356 (L); Nakhon Si Thammarat, Groong Ching waterfall, J.F. Maxwell 86-327 (L); Narathiwat, Sukirin, J.F. Maxwell 87-259 (PSU); Nakhon Si Thammarat, Khao Luang, J.F. Maxwell 87-327 (PSU); Chanthaburi, Khao Sip-ha Chan, K. Kertsawang 580 (QBG); K. Larsen et al. 40896 (K); Nakhon Si Thammarat, Khao Luang, M. Tagawa , K. Iwatsuki & N. Fukuoka T4622 (L); ibis., M. Tagawa , K. Iwatsuki & N. Fukuoka T4681 (L); Nakhon Si Thammarat, Khao Luang, M. Tagawa , K. Iwatsuki, H. Koyama & A. Chintayungkun T4622 (L); Nan, Doi Phuka, P. Pongkai 31 (BCU); Nakhon Si Thammarat, Khao Luang, P. Pongkai 57 (BCU); Nakhon Si Thammarat, Khao Luang, P. Pongkai 58 (BCU); ibis., P. Pongkai 59 (BCU); ibis., P. Pongkai 117 (BCU); Narathiwas, Phu Khao Thong, T. Boonkerd 1518 (BCU); Chumphon, Patoh, T. Boonkerd 1534 (BCU); Nakhon Si Thammarat, Khao Luang, T. Boonkerd 330 (BCU). BRUNEI. Tutong Dist., M.J.E. Coode 6321 (K); Temburong P.S. Ashton 467 (K). INDONESIA. Java, C.L. Blume s.n. (K); Halimun-Salak, C.W. Weiran 197 (PE); ibis., C.W. Weiran 343 (PE); Sumatra Jambi Prov., E. Gardette 190 (K); Sumatra, E. Gardette 351 (K); Borneo, F.W. Burbidge s.n. (K); Java, G. Mettenius 4581 (K); Sumatra, K. Iwatsuki, G. Murata, J. Dransfield & Saerudin S872 (K); Kalimantan, K. Iwatsuki, M. Kato, G. Murata & Y.P. Mogea B393 (K); Seram, M. Kato, K. Ueda & Z. Fanani C13363 (K); Kalimantan, M. Kato, M. Okamoto & E.B. Walujo B10242 (K); Kalimantan, T.G. Laman, I.A. Rachman & E. Mirmanto 93 (K); ibis., T.G. Laman, I.A. Rachman & E. Mirmanto 105 (K); ibis., T.G. Laman, I.A. Rachman & E. Mirmanto 253 (K); Sumatra, W. Hancock 16 (K). MALAYSIA. Perak, A. Ernst 1151 (K); no locality, A.C. Maingay 1772 (K); Pahang, A.G. Piggott 1549 (K); Burok, A.G. Piggott 1864 (K); Negeri Sembilan Gunong Telapak, A.G. Piggott 1903 (K); Pahang, A.G. Piggott 2429 (K); Selangor, A.G. Piggott 2755 (K); Pahang, A.G. Piggott 3101 (K); Selangor, B. Molesworth-Allen 3383 (K); Perak, B. Scortechini s.n. (K); Pahang, B.S. Parris & P.J. Edwards 10394 (K); Pahang, B.S. Parris 10884 (K); Sabah, B.S. Parris 11373 (K); Sarawak, B.S. Parris 6566 (K); ibis., B.S. Parris 6572 (K); Penang, C. Curtis 1267 (K); Selangor, C.B. Kloss s.n. (K); no locality, D.F.A. Hervey & H.N. Ridley 4340 (K); Selangor, D.W. Lee UL28 (K); Perak, Dr. King’s Collector 658 (K); ibis., Dr. King’s Collector 2412 (K); ibis., Dr. King’s Collector 10751 (K); Pahang, E. Smith 818 (K); Trengganu, E.J.H. Corner 30104 (K); Negeri Sembilan Bukit Tangga, E.S. Hose & G. Hose 5043 (K); Perak, F.E.W. Venning MA85 (K); Perak, G.F. Hose s.n. (K); Pahang, G.H. Addison SFN37191 (K); Borneo, Giles & Wooliams 294 (K); Malacca, H. Cuming 131 (K); ibis., H. Cuming 386 (K); Perak, H.C. Robinson s.n. (K); Sabah, H.F. Comber 4135 (K); Perak, H.N. Ridley 11428 (K); Selangor, H.N. Ridley 13438 (K); Perak, H.N. Ridley 14224 (K); Pahang, H.N. Ridley 16213 (K); Selangor, H.N. Ridley s.n. (K); ibis., H.N. Ridley s.n. (K); Selangor, H.N. Ridley, W. Robinson & C.B. Kloss s.n. (K); Perak, J. Day s.n. (K); Perak, J. Sinclair & Kiah 38744 (K); Negeri Sembilan Bukit Tannga, M. Nur s.n. (K); Johore, P.J. Edwards 1906 (K); Sabah, P.S. Shim SAN81806 (K); Selangor Kanching Forest, R. Melville 4744 (K); Negeri Sembilan Gunong Tampin, R.E. Holttum 9537 (K); Pahang, R.E. Holttum s.n. (K); Perak, R.H. Yapp 520 (K); Malacca, W. Griffith s.n. (K); Perak, W. Robinson s.n. (K). PHILIPPINES. No locality, H. Cuming 336 (K). SINGAPORE. Bukit Timah, C.G. Matthew s.n. (K).

Figures

FIGURE 37. Diplazium tomentosum Blume.A, whole plant. B, pinna with sori. C, scale showing entire and not black marginal cells. P. Pongkai 57 (BCU).