Orthotrichum revolutum(Orthotrichaceae, Bryophyta), an Endemic Species to China, Rediscovered after 123 Years

doi:10.7525/j.issn.1673-5102.2021.04.001

Abstract

Abstract:

Orthotrichum revolutum， an endemic to China, has not been re-found since its original collection made 123 years ago. It is recorded from a new locality: Baihuashan Nature Reserve, Beijing, China. The plants morphologically agree well with the type specimens. Orthotrichum revolutum is firstly well photoed and its distribution is firstly mapped. Four records of this species from China’s Gansu, Xinjiang and Japan, Kyrgyzstan are all misidentifications in previous studies. We also discuss its main differences from close species and re-evaluate its threat status in the field.

Key words: mosses, taxonomy, Orthotrichum, Baihuashan, threat status

CLC Number:

Q949.35

Qing-Hua WANG, Qiang HE, Yu JIA. Orthotrichum revolutum(Orthotrichaceae, Bryophyta), an Endemic Species to China, Rediscovered after 123 Years[J]. Bulletin of Botanical Research, 2021, 41(4): 481-487.

Figures/Tables 4

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Table 1

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References 12

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	O.revolutum	O.crenulatum	O.erubescens	O.vermiferum
plants	0.5-1 cm, forming loosely tufts	0.5-1.1 cm, forming more compact tufts	(0.3)0.5-0.8(1.2) cm, forming loosely tufts	0.5-1.1 cm, forming loosely tufts
leaf apexes	acute	obtuse	acute or obtuse	acuminate
dry capsules	hardly constricted, often hollowed at the base	somewhat constricted, never hollowed at the base	strongly constricted, rarely hollowed at the base	somewhat constricted, never hollowed at the base
vaginula	naked	naked	naked	hairy
endostome segments	16,linear,finely papillose	8,9,10,12 or 16,linear, finely papillose,rarely smooth	8,linear-lanceolate, smooth to striate,united at the base	16,linear,finely papillose, united at the base
exostome teeth	densely and finely papillose,partially fused into ridges near the base	densely and finely papillose outside,in inside papillose often gathered around the edge and sparse in the middle near the apex and arranged in lines at the lower part	finely and evenly papillose on the outside,longitudinally-striate on the inside	papillose throughout on outside,vertically-striate below and finely papillose above on inner surface
calyptra	naked	naked	sparsely hairy near the apex,rarely naked	few hairs near the apex or naked
spores	(13)17-19(21) μm	(12)15-19(22) μm	(12)15-18(29) μm	(13)17-26(42) μm

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