Bryocrumia vivicolor (Broth. & Dixon) W.R. Buck (1987: 522)

Yi, Zhao-Qin, Mu, Li-Qiang & Jia, Yu, 2022, Notes on Glossadelphus M. Fleisch. (Hypnaceae, Bryophyta) in China, Phytotaxa 541 (3), pp. 225-239 : 228-229

2-1. Bryocrumia vivicolor (Broth. & Dixon) W.R. Buck (1987: 522) . ( Fig. 2 ).

Taxithelium vivicolor Broth. & Dixon, Rec. Bot. Surv. India 6(3): 86–87, pl. 1, f. 4. 1914. ≡ Glossadelphus vivicolor (Broth. & Dixon) Broth., Nat. Pflanzenfam. (ed. 2) 11: 444. 1925. Type:— INDIA. Maharashtra: Mahabaleshwar, on stones in the bed of a torrent, 1220 m, January 1909, Sedgwick [23] (lectotype, designated by O’Shea & Buck 2001: BM [BM000661471]!). INDIA. Tamil Nadu: Shembaganur, 1911, Foreau s. n. (paratype: BM [BM000661472]!). (fide Buck 1987) .

Glossadelphus andersonii E.B. Bartram, Bryologist 54: 81. f. 1–6. 1951. ≡ Taxiphyllum andersonii (E.B. Bartram) H.A. Crum, Bryologist 68: 220. 1965. ≡ Bryocrumia andersonii (E.B. Bartram) L.E. Anderson, Phytologia 45: 66. 1980. Type:— U.S.A. South Carolina: Oconee Co., Lower Falls, Whitewater River, about 3 miles NW of Jocassee, moist vertical rock, cool ravine, hemlock-hardwood community, 460 m, 6 June 1950, L.E. Anderson 9237 (holotype: FH [FH00060995]!; isotype: NY [NY01028878]!). (fide Anderson et al. 1990) .

Glossadelphus serpyllifolius P. de la Varde, Ark. Bot. , n.s. 3: 193. f. 33. 1955. Type :— UGANDA. Rwenzori Mts., Mubuku valley, at a small stream in montane rain forest, 2100 m, 19 March 1948, Hedberg 329c p.p. (holotype: PC). (fide O’Shea & Buck 2001) .

Myurella brevicosta J.X. Luo & P.C. Wu, Acta Phytotax. Sin. 18: 125. f. 4: 1–8. 1980. Type :— CHINA. Xizang: Dingjie Co., on stone, 2400 m, 6 June 1974, Z.-C. Ni 143 (holotype: PE [ PE02129318 ]!) . syn. nov.

The detailed morphological description and habitat of Chinese Bryocrumia vivicolor is provided by Ma et al. (2016).

World distribution:— China [ Taiwan ( Kim & Yamaguchi 2020), Xizang, Yunnan], Congo-Kinshasa (be known formerly as Zaire, O’Shea & Buck 2001), India, Indonesia, Japan ( Kim & Yamaguchi, 2020), Kenya ( O’shea & Buck 2001), Sri Lanka, Tanzania ( Kis 2002), Thailand ( Printarakul et al. 2013), Uganda ( O’Shea & Buck 2001), U.S. A [North Carolina ( O’Shea & Buck 2001), South Carolina].

Other specimens examined:— CHINA. Yunnan: Baoshan City, Gaoligong Shan range, J.R. Shevock 27343 (E, PE); Wenshan Region, Maguan Co., W. Han 719 (PE); Xishuangbanna, Menghai Co., W.-X. Xu 6452 (PE, as Glossadelphus glossoides ); Yangbi Co., Diancang Shan range, P.L. Redfearn Jr., Y.-G. Su & S. He 278, 647 (PE, as Bryocrumia andersonii ).

INDIA. Maharashtra: Mahabaleshwar, L. J. Sedgwick 4751 ( BM); Western Ghats, Townsend Clifford C. 73/394, Townsend Clifford C. 73/481 (all E); Central Prov., Nuwara Eliya Dist. Townsend Clifford C. 73/1438 ( E). INDONESIA. Java: Pangerango, H. A. Moller s. n. ( NY [ NY 03550136], as Taxithelium glossoides ). SRI LANKA. C. H. Binstead 354, 204 ( BM).

Comment:— Myurella brevicosta J.X. Luo and P.C. Wu (1980: 125) is a notable species from Xizang, China. It is characterized by (1) slightly firm plants with loose branches, (2) small, ovate to oblong-ovate leaves with obtuse to round apex and contracted bases, (3) weakly forked, occasionally absent costae, and (4) thick-walled laminal cells. It was reduced to a synonym of Glossadelphus prostratus by Gao and Cao (1992). Our observation of the type of M. brevicosta shows that it is conspecific with Bryocrumia vivicolor (Broth. & Dixon) W.R. Buck (1987: 522) , which is noted as growing on moist rocks, most along streams, seasonally (irregularly) submerged ( Ma et al. 2016). Although G. prostratus resembles B. vivicolor , the former species can be separated from the latter in having acuminate perichaetial leaves and incurved capsules ( Ma et al. 2016). Thus, we place M. brevicosta in synonymy with B. vivicolor .

Bryocrumia vivicolor has various leaf forms in different collections ( Kim & Yamaguchi 2020). The leaves of Xizang plants are elliptic, much larger, and arrange closer, which are similar to those from Mt. Li (Taiwan) specimen ( Kim & Yamaguchi 2020). Bryocrumia vivicolor is known in China from Yunnan ( Redfearn et al. 1989, O’Shea & Buck 2001, Ma et al. 2016) and Taiwan ( Kim & Yamaguchi 2020). As Myurella brevicosta becoming a synonym, a new provincial record in China, Xizang, is added for B. vivicolor .

Figures

FIGURE 2. Bryocrumia vivicolor. A, B: Leafy branches; C, D: Branch leaves; E: Plants; F: Pseudoparaphyllium and primordium; G: Cross-section of stem; H: Leaf apex; I: Basal laminal cells; J: Median laminal cells. A, C & E–J from holotype of Myurella brevicosta; B & D from lectotype of B. vivicolor. Scale bars: a for G–I; b for F, J.