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Racelopus pilifer Dozy & Molk. == Pogonatum piliferum fide Touw 1986: 29.

Racelopodopsis crassinervis Thér. & Henry = Pogonatum camusii fide Touw 1986: 26.

Racopilum P. Beauv. (Racopilaceae)

R. cuspidigerum (Schwaegr.) Aongstr. var. cuspidigerum: (as Racopilum schmidii, Dixon 1932: 34, Horikawa & Ando 1964: 12, Tixier & Smitinand 1966: 176, Tixier 1971: 126).
Illustrations. Gangulee (1969-80, Fig. 583); Koponen & Norris (1986, Fig. 3).
Habitat. Alt. 400-1685 m.
Distribution in Thailand. (MAP) CHANTHABURI. Chanthaburi: LNS 31985 (AAU, MO). MAHARAT. Lamphun: Tagawa & Kitagawa 12034, 12121 (both in NICH), Noguchi 1973: 240. NAKHON SAWAN. Tak: Tagawa 12902 (NICH), Noguchi 1973: 240. PAYAP. Chiang Mai: Kerr 48 (BM), Dixon 1932: 34; Ogawa 67960, Yoda 68015 (both in HIRO), Horikawa & Ando 1964: 12; Tixier s.n. (PC), Tixier 1971: 126; Tagawa & Kitagawa 2563 (NICH), Kitagawa 3328, 3331, 3363, 3377, 12134 (all in NICH), Noguchi 1973: 240; LSaW 2054, 2056, 2170, 2171b, 2616, 2664 (all in AAU, MO). PHITSANULOK. Phitsanulok: Hansen et al. 11587 (C), Noguchi 1972a: 174; Kitagawa 12541, 12551, 12648, Tagawa & Kitagawa 2093 (all in NICH), Noguchi 1973: 240; LSmW 614 (MO). PRACHINBURI. Nakhon Nayok: Hansen et al. 11654 (C), Noguchi 1972a: 174; LSmW 133, 220, 228, 289 (all in AAU, MO). RACHABURI. Rat Buri: Larsen 9491, 9492 (both in C), Noguchi 1972a: 174. RACHASIMA. Nakhon Ratchasima: Tixier s.n. (PC), Tixier 1971: 126; LSaW 3216 (MO). UDAWN. Loei: Smitinand 2000 (BKF, PC, US), Tixier & Smitinand 1966: 176, Reed & Robinson 1967: 66; Tagawa & Kitagawa 436, 963, 1005, 1137 (all in NICH), Noguchi 1973: 240; CLW 4647 (AAU, MO).
Range in Asia: Borneo, Celebes, Mainland China, India, Java, Kampuchea, Laos, Myanmar, Nepal, Philippines, and Vietnam.
R. cuspidigerum var. demissum (Bosch & Sande Lac.) Fleisch.: Illustrations. Dozy & Molkenboer (1855-70, Tab. 146, as Racopilum demissum).
Habitat. Alt. 1000-1525 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Richards 5472 (BO), Giesy & Richards 1959: 580. UDAWN. Loei: Kerr 103 (BM), Dixon 1932: 34.
Range in Asia: Borneo, Celebes, India, Java, Kampuchea, Philippines, and Vietnam.
R. orthocarpum Mitt.: [Tan & Iwatsuki (1991) synonymized Racopilum orthocarpum with R. cuspidigerum. Tan & Iwatsuki (1993) reported this species from Thailand by citing a reference of Touw (1968). The latter author, however, clearly indicated otherwise: "the differences between the present species and R. cuspidigerum (Schwaegr.) Aongstr. are small, and presumedly the Thai records of the last mentioned species have to be transferred to R. orthocarpus. On the other hand, sterile specimens cannot be named safely, and have been placed here with some hesitation"].
Illustrations. Gangulee (1969-80, Fig. 582).
Habitat. Alt. 600-2100 m.
Distribution in Thailand. (MAP) NAKHON SAWAN. Tak: Touw 8200 (L, MO), Touw 1968: 237. NAKHON SI THAMMARAT. Nakhon Si Thammarat: Touw 11449 (L, MO), Touw 1968: 237. PAYAP. Chiang Mai: Touw 8476, 8512, 9365, 9422, 9485, 9855, 9879 (all in L, MO), Touw 1968: 237. PRACHINBURI. Nakhon Nayok: Touw 12231 (L, MO), Touw 1968: 237. UDAWN. Loei: Touw 10403, 10821, 11121 (all in L, MO), Touw 1968: 237.
Range in Asia: Mainland China, India, Myanmar, Nepal, Sikkim, Sri Lanka, and Vietnam.

R. schmidii (C. Müll.) Jaeg. = R. cuspidigerum fide Noguchi 1972a: 173.

R. siamense Dix.*: Illustrations. Unknown.
Habitat. Alt. 1500-1650 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Rock 151a (type, BM), 194a (paratype, BM), Dixon 1932: 35.
Range in Asia: Endemic to Thailand.
R. spectabile Reinw. & Hornsch.: Illustrations. Koponen & Norris (1986, Fig. 4).
Habitat. Alt. 200 m.
Distribution in Thailand. (MAP) PATTANI. Narathiwat: CLW 4053a (MO). PHUKET. Trang: Tagawa & Kitagawa 6774 p.p. (NICH), Noguchi 1973: 240; CLW 3725 (AAU, MO).
Range in Asia: Borneo, Mainland China, New Guinea, Philippines, Sri Lanka, and Sumatra.

Radulina Buck & Tan (Sematophyllaceae)

R. hamata (Dozy & Molk.) Buck & Tan: (as Trichosteleum hamatum, Dixon 1932: 42, Tixier 1070b: 545, Tixier 1971: 152).
Illustrations. Bartram (1939, Pl. 25, fig. 435); Gangulee (1969-80, Fig. 979), all as Trichosteleum hamatum).
Habitat. Alt. 150-1100 m.
Distribution in Thailand. (MAP) CHANTHABURI. Trat: CLW 4976, LSmW 1816 (both in AAU, MO). NAKHON SAWAN. Tak: Floto 7709 (C), Noguchi 1972a: 182. NAKHON SI THAMMARAT. Nakhon Si Thammarat: Kerr 297a (BM), Dixon 1932: 42. PHUKET. Ranong: Tixier 3960 (PC), Tixier 1970b: 545. PRACHINBURI. Prachin Buri: LSmW 1155c, 1163 (both in AAU, MO). RACHASIMA. Nakhon Ratchasima: Tixier s.n. (PC), Tixier 1971: 152. UDAWN. Loei: CLW 4656 (AAU, MO).
Range in Asia: Borneo, Celebes, Mainland China, India, Japan, Java, Kampuchea, Laos, Malaysia, New Guinea, Philippines, Sri Lanka, Sumatra, and Vietnam.

Regmatodon Brid. (Leskeaceae)

R. declinatus (Hook. f.) Brid.: Illustrations. Gangulee (1969-80, Fig. 782).
Habitat. Alt. 1300-1500 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Rai: Kitagawa 3593 p.p. (NICH), Noguchi 1973: 248. PHITSANULOK. Phetchabun: Tixier s.n. (PC), Tixier 1971: 141.
Range in Asia: Mainland China, India, Myanmar, Nepal, Taiwan, and Vietnam.
R. orthostegius Mont.: [Eakin (1976: 28) considered this species a synonym of Regmatodon polycarpus (Griff.) Mitt., while Wijk et al. (1959-1969, Vol. 4: 281) treated them vice versa. Although the new synonym has not been formally published by Eakin, R. polycarpus has been used by many authors in the west. In Asia, Regmatodon orthostegius has often be recognized. Clearly, the two species are considered identical by nearly all studies. The confusion is centered around which of these two species is an older name. Eakin (1976) interpreted that Anhymenium polycarpon Griff., the basionym for Regmatodon polycarpus, was published in 1838 when the paper was read at a meeting before the Linnean Society of London. However, the proceedings of this meeting were only formally published in 1843. If this date is accepted, Regmatodon orthostegius Mont. was published earlier (1842) than R. polycarpus].
Illustrations. Gangulee (1969-80, Fig. 783).
Habitat. Alt. 1000-1750 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Touw 8903, 9063 (both in L, MO), 9845 (L), Touw 1968: 227; Kitagawa 3354 p.p. (NICH), Noguchi 1973: 248.
Range in Asia: Bhutan, Mainland China, India, Nepal, Sikkim, Sri Lanka, and Vietnam.

Reimersia Chen (Pottiaceae)

R. inconspicua (Griff.) Chen: Illustrations. Eddy (1990, Fig. 273, A-F); Zander (1993, Pl. 30, figs. 1-8).
Habitat. Alt. 1812 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Robbins 3681 (L), Touw 1968: 235.
Range in Asia: Mainland China, India, Japan, Java, Malaysia, and Philippines.

Rhaphidorrhynchium parvulum (Broth.) Broth. == Sematophyllum parvulum fide Dixon 1932: 42.

Rhaphidostegium parvulum Broth.* == Sematophyllum parvulum fide Dixon 1932: 42.

R. subconnivens Broth.* == Sematophyllum subconnivens fide Dixon 1932: 42.

Rhaphidostichum Fleisch. (Sematophyllaceae)

R. boschii (Dozy & Molk.) Seki: (as Trichosteleum boschii, Dixon 1932: 42, Tixier & Smitinand 1966: 189, Noguchi 1972a: 182; as Trichosteleum brachypelma, Dixon 1932: 42, Tixier 1971: 152; as Trichosteleum singapurense, Touw 1968: 240).
Illustrations. Bartram (1939, Pl. 26, fig. 44); Gangulee (1969-80, Fig. 977), all as Trichosteleum boschii.
Habitat. Alt. 15-1700 m.
Distribution in Thailand. (MAP) CHANTHABURI. Chanthaburi: Kerr 439, 445, 450 (all in BM), Dixon 1932: 42; Trat: Schmidt s.n. (H), Brotherus 1901: 125. NAKHON SI THAMMARAT. Nakhon Si Thammarat: Suvarnakoses 614 (PC), Tixier & Smitinand 1966: 189. PHITSANULOK. Phitsanulok: Hansen et al. 11606 (C), Noguchi 1972a: 182. PHUKET. Satun: Hansen & Smitinand 12511 (L), Touw 1968: 240; CLW 3811 (AAU, MO). PRACHINBURI. Nakhon Nayok: LSaW 3388 (AAU, MO). RACHASIMA. Nakhon Ratchasima: Tixier s.n. (PC), Tixier 1971: 152.
Range in Asia: Mainland China, India, Japan, Java, Kampuchea, Laos, Malaysia, Myanmar, Nepal, Philippines, Sumatra, Taiwan, and Vietnam.
R. bunodiocarpum (C. Müll.) Fleisch.**: Illustrations. Brotherus (1924-25, Fig. 739).
Habitat. Alt. 350 m.
Distribution in Thailand. (MAP) PHUKET. Trang: CLW 3670, 3672 (both in AAU, MO). RACHASIMA. Nakhon Ratchasima: CLW 4501 (AAU, MO).
Range in Asia: Indonesia.
R. chaetomitriopsis (Dix.) Touw *: (as Trichosteleum chaetomitriopsis, Dixon 1935: 24, Tixier & Smitinand 1966: 189, Tixier 1971: 152).
Illustrations. Unknown.
Habitat. Alt. 1200-1700 m.
Distribution in Thailand. (MAP) PRACHINBURI. Chon Buri: Smitinand 3214 (BKF, PC), Tixier & Smitinand 1966: 189; Nakhon Nayok: Touw 12091 (L, MO), Touw 1968: 239. RACHASIMA. Nakhon Ratchasima: Tixier s.n. (PC), Tixier 1971: 152. UDAWN. Loei: Kerr 569 (paratype of Trichosteleum chaetomitriopsis, BM), Dixon 1935: 24.
Range in Asia: Laos.

R. complanatum (Dix.) Dix. == Papillidiopsis complanata fide Buck & Tan 1989: 12.

R. leptocarpoides (Broth.) Broth.*: (as Trichosteleum leptocarpoides, Brotherus 1901: 124, Dixon 1932: 44).
Illustrations. Unknown.
Habitat. Altitude unknown.
Distribution in Thailand. (MAP) CHANTHABURI. Trat: Ko Chang, Schmidt s.n. (type of Trichosteleum leptocarpoides, H), Brotherus 1901: 124.
Range in Asia: Endemic to Thailand.

R. luxurians (Dozy & Molk.) Fleisch. == Papillidiopsis luxurians fide Buck & Tan 1989: 12.

R. luzonense(Broth.) Broth. **: Illustrations. Bartram (1939, Pl. 24, fig. 417, as Sematophyllum luzonense).
Habitat. Alt. 1000-1100 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: LSaW 2184, 2577, 2585 (all in AAU, MO). PRACHINBURI. Nakhon Nayok: CLW 4243, 4256, 4327 (all in AAU, MO). UDAWN. Loei: CLW 4765 (AAU, MO).
Range in Asia: Philippines.
R. subrevolutum (Broth.) Broth.*: (as Sematophyllum subrevolutum, Brotherus 1901: 123, Dixon 1932: 41).
Illustrations. Unknown.
Habitat. Alt. 126 m.
Distribution in Thailand. (MAP) CHANTHABURI. Trat: Klong Majum, Schmidt s.n. (type of Sematophyllum subrevolutum, H), Brotherus 1901: 123.
Range in Asia: Endemic to Thailand.

Rhizogonium spiniforme (Hedw.) Bruch in Kranss == Pyrrhobryum spiniforme fide Mitten 1868: 174.

Rhodobryum (Schimp.) Hampe (Bryaceae)

R. commersonii (Schwaegr.) Paris: (as Bryum madurense, Noguchi 1973: 238).
Illustrations. Magill (1987, Fig. 112); Mohamed (1984, Fig. 5).
Habitat. Alt. 1400-1685 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Kitagawa 3407 (NICH), Noguchi 1973: 238.
Range in Asia: India.
R. giganteum (Schwaegr.) Par.: (as Bryum giganteum, Horikawa & Ando 1964: 9, Noguchi 1973: 238).
Illustrations. Eddy (1996, Fig. 435, A-E); Mohamed (1984, Fig. 2).
Habitat. Alt. 700-2585 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Kerr 6, 45, 65 (all in BM), Dixon 1932: 23, Mohamed 1984: 284; Ogawa 67815, 67818, 67841 67960a, Yoda 67222, 67246, 67252, 67288, 67336, 67362, 67369, 67389, 67402, 67426, 67476, 6758 (all in HIRO), Horikawa & Ando 1964: 9; Robbins 3581, 3639, Smitinand & Alsterlund 6689 (all in BKF, PC), Tixier & Smitinand 1966: 173; Hansen et al. 11408 (C), Noguchi 1972a: 173; Kitagawa 3629, Tagawa & Kitagawa 1853 (both in NICH), Noguchi 1973: 238; Touw 9533 (BM, MO), Mohamed 1984: 284; LSaW 1895, 12444 (both in AAU, MO); Touw 8466, 8698, 9877 (all in MO).
Range in Asia: Borneo, Celebes, Mainland China, India, Japan, Java, Laos, Malay Peninsula, Myanmar, Nepal, New Guinea, Philippines, Sikkim, Sri Lanka, Sumatra, Taiwan, and Vietnam.
R. huillense (Welw. & Duby) Touw: (as Bryum huillense, Ochi 1985: 61).
Illustrations. Unknown.
Habitat. Alt. 1200-1500 m.
Distribution in Thailand. (MAP) UDAWN. Loei: Tagawa & Kitagawa 1921 (NICH), Noguchi 1973: 238.
Range in Asia: Borneo and Philippines.
R. roseum (Hedw.) Limpr.: Illustrations. Gangulee (1969-80, Fig. 494); Mohamed (1984, Fig. 1); Noguchi (1987-94, Fig. 215, B).
Habitat. Alt. 1100-1200 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: LSaW 2180, 2576 (both in AAU, MO). UDAWN. Loei: Kerr 82 (BM), Dixon 1932: 23; Smitinand 302 (BKF, PC), 1256, (BKF, PC, US), Tixier & Smitinand 1966: 173, Reed & Robinson 1967: 65; CLW 4892 (AAU, MO).
Range in Asia: Mainland China, India, Japan, Nepal, Siberia, Sri Lanka, Taiwan, and Vietnam.

Rhynchostegiella (Bruch & Schimp. in B.S.G. )Limpr. (Brachytheciaceae)

R. menadensis (Sande Lac.) Bartr.: Illustrations. Bartram (1939, Pl. 22, fig. 385); Gangulee (1969-80, Fig. 870).
Habitat. Alt. 40-370 m.
Distribution in Thailand. (MAP) SURAT. Surat Thani: Tixier s.n. (BM), Tixier 1971: 144. UDAWN. Loei: Touw 10366 (L, MO), Touw 1968: 218.
Range in Asia: Celebes, India, Java, Myanmar, Malaysia, Philippines, and Vietnam.
R. ovalifolia Dix.*: Illustrations. Unknown.
Habitat. Alt. 50 m.
Distribution in Thailand. (MAP) NAKHON SI THAMMARAT. Nakhon Si Thammarat: Kerr 314 (type, BM), Dixon 1932: 37. SURAT. Surat Thani: Kerr s.n. (BM), Dixon 1935: 18.
Range in Asia: Endemic to Thailand.
R. scabriseta (Schwaegr.) Broth.: Illustrations. Gangulee (1969-80, Fig. 867).
Habitat. Alt. 2250 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Touw 10167 (L), Touw 1968: 218.
Range in Asia: India, Nepal, and Sikkim.

Rhynchostegium Schimp. in B.S.G. (Brachytheciaceae)

R. celebicum (Sande Lac.) Jaeg.: Illustrations. Bartram (1939, Pl. 22, fig. 384, as Eurhynchium celebicum); Gangulee (1969-80, Fig. 883).
Habitat. Alt. 550-2300 m.
Distribution in Thailand. (MAP) NAKHON SAWAN. Tak: Touw 8137 (MO). PAYAP. Chiang Mai: Yoda 67551, 67553 (both in HIRO), Horikawa & Ando 1964: 30; Hansen et al. 11395 (C), Noguchi 1972a: 181. PHITSANULOK. Phitsanulok: LSmW 609 (MO). PRACHINBURI. Nakhon Nayok: Touw 12224 (MO). RACHASIMA. Nakhon Ratchasima: Tixier s.n. (PC), Tixier 1971: 144. UDAWN. Loei: Smitinand 1253 (BKF, US), Reed & Robinson 1967: 67; Touw 10428, 10452, 11122 (all in MO).
Range in Asia: Celebes, India, Java, Myanmar, New Guinea, Philippines, Sumatra, Taiwan, and Vietnam.
R. herbaceum (Mitt.) Jaeg.: Illustrations. Gangulee (1969-80, Fig. 882).
Habitat. Alt. 1000 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Tixier s.n. (PC), Tixier 1971: 144.
Range in Asia: Bhutan, Mainland China, India, Sikkim, and Sri Lanka.
R. javanicum (Bel.) Besch.: Illustrations. Dozy & Molkenboer (1855-70, Tab. 257, as Hypnum javanicum).
Habitat. Alt. 600-800 m.
Distribution in Thailand. (MAP) NAKHON SI THAMMARAT. Nakhon Nayok: Kerr 307 (BM), Dixon 1932: 37. NAKHON SAWAN. Tak: Touw 8103 (L, MO), Touw 1968: 218.
Range in Asia: Borneo, Java, Malaysia, Sri Lanka, and Sumatra.
R. muelleri Jaeg. == Platyhypnidium muellerii fide Fleischer 1904-22: 1537.: [Noguchi (1991: 1010) accepted Rhychostegium muelleri, while Bartram (1933: 214) and Gangulee (1969-80: 1735) placed it under Eurhynchium].
R. vagans (Harv.) Jaeg.: [Touw (1968: 218) reported this species from Thailand without citing any Thai collection. Tan & Iwatsuki (1991: 46) placed it under Eurhynchium].
Illustrations. Bartram (1939, Pl. 22, fig. 383, as Eurhynchium vagans); Gangulee (1969-80, Fig. 884); Takaki (1956, Fig. 43, 13-19).
Habitat. Alt. 400-2250 m.
Distribution in Thailand. (MAP) PAYAP. Chiang Mai: Smith s.n. (BM), 1922, Dixon 1932: 37; Yoda 67216, 67220, 67237, 67343, 67465 (all in HIRO), Horikawa & Ando 1964: 30; Touw 8400, 8451, 9459, 9518, 9529, 9572, 10195 (all in MO). RACHABURI. Kanchanaburi: Kwae Noi Basin Exped. 1000 (BKF, PC), Tixier & Smitinand 1966: 186. UDAWN. Loei: Touw 10831 (MO).
Range in Asia: Borneo, Mainland China, India, Japan, Java, Laos, Myanmar, Nepal, Philippines, Sikkim, Sri Lanka, Taiwan, and Vietnam.

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