Page 142 - 《广西植物》2024年第10期
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1 9 4 4                                广  西  植  物                                         44 卷
                  Vietnam is located in the east of Indochina  lanceolateꎬ obliquely spreadingꎬ included angle with
            Peninsulaꎬ bordering Guangxi and Yunnan of China to  stem about 40°ꎬ length ̄width ratio about 5 ∶ 1ꎬ base
            the northꎬ Laos and Cambodia to the west. Affected by  cuneateꎬ sessileꎬ apex acuminateꎬ margin entire.
            the tropical monsoon climateꎬ it has high annual rainfall  Sporangium spikes terminalꎻ sporophylls ovate or ovate ̄
            and humidityꎬ and is one of the 16 countries with high  triangularꎬ acuminate or acute. Sporangia in axils of
            biodiversity in the world. There are a total of 874 species  sporophyllsꎬ reniformꎬ 2 ̄valvedꎬ yellow.
            of lycopsids and ferns in 38 families and 116 genera   Specimens examined: Lam Dong Prov.ꎬ Lac
            (POWOꎬ 2024)ꎬ and there have been frequent reports of  Duong  Distr.ꎬ  Da  Chays  Communeꎬ   Hon
            new species (Parris et al.ꎬ 2015ꎻ Pham et al.ꎬ 2022) and  Ginomountainous rangeꎬ ca. 1 530 mꎬ epiphyte in
            new recorded species (Wu et al.ꎬ 2005ꎬ 2006ꎬ 2012ꎻ  evergreen seasonal tropical mixte broadꎬ 29 Oct. 2006ꎬ
            Chen et al.ꎬ 2020ꎬ 2021ꎬ 2023ꎻ Wei et al.ꎬ 2022) in  S. G. Wuet P. K. Loc etc. WP1194(KUN)ꎻ Lam Dong
            recent years. While examining photographs and specimens  Prov.ꎬ Lac Duong Distr.ꎬ Da Chays Communeꎬ BiDoup
            of lycopsids and ferns collected in northern Vietnamꎬ the  mountainous rangeꎬ around pointꎬ ca. 1 900 - 2 000 mꎬ
            authors identified two species ( Adiantum longzhouensis  epiphyte in evergreen seasonal tropical broad ̄leavedꎬ 31
            and Lepisorus bicolor ) as newly recorded species in  Oct. 2006ꎬ S. G. Wuet P. K. Loc etc. WP1264(KUN)ꎻ
            Vietnam ( Wang et al.ꎬ 2017 ). Through consulting  Lam Dong Prov.ꎬ Lac Duong Distr.ꎬ Cong Troi
            relevant materials and specimensꎬ it was found that  FPStationꎬ around pointꎬ ca. 1 680 -1 760 mꎬ epiphyte
            Adiantum longzhouensis had been collected in Vietnam  in evergreen seasonal tropical broad ̄leavedꎬ 7 Nov.
            before (Wei et al.ꎬ 2022)ꎬ the reported A. juxtapositum  2006ꎬ S. G. Wuet P. K. Loc etc. WP1443(KUN).
            Ching   should  be  the  misidentification  of  A.     Distribution: Type specimens were collected from
            longzhouensis. Phlegmariurus guangdongensis was also a  Guangdong and distributed in Guangxiꎬ Guangdong and
            newly recorded species from Vietnam(Wu et al.ꎬ 2013ꎻ  Hainan of China. Epiphytic on tree trunks or rock
            Nong et al.ꎬ 2016). It is now reported together to increase  walls. Newly recorded species for Vietnam.
            the biodiversity inventory of Vietnam. The voucher     Notes: P. guangdongensis is similar to P. fordii
            specimens were kept in the Herbarium of Kunming    and P. henryiꎬ difference is that the sporophylls and
            Institute of Botanyꎬ Chinese Academy of Sciences   trophophylls distinctly dimorphic and the middle
            (KUN)ꎬ Herbarium of Institute of Botanyꎬ Chinese   trophophylls are sessile. It is also similar to P.
            Academy of Sciences (PE) and Herbarium of Guangxi  phlegmariaꎬ except that the stems of P. guangdongensis
            Forestry Research Institute (GXFI).                are 1 to 2 dichotomous branchesꎬ the plants are nearly
                 Phlegmariurus guangdongensis Ching in Acta    erect or inclinedꎬ and the trophophylls are lanceolate or
            Bot. Yunnan. 4 (2): 123. 1982ꎻ Li Bing Zhang et    elliptical lanceolateꎬ with a length ̄width ratio less than
            H. S. Kung in Acta Phytotax. Sin. 38 (1): 28. 2000ꎬ et  7 ∶ 1.
            in Fl. Reipubl. Popularis Sin. 6(3): 35. 2004ꎻ Li Bing  Adiantum longzhouensis A. H. Wangꎬ F. G.
            Zhang et Kunio Iwatsuki in Flora of China Vol. 2 – 3:  Wang & F. W. Xing in PLoS ONE 12(4): e0172729
            22. 2013. ——— Huperzia guangdongensis ( Ching )    (14). 2017. 龙州铁线蕨 (Fig. 1: D-F)
            Holub in Folia Geobot. Phytotax. 20: 73. 1985. 广东马     Type: China. Guangxiꎬ Daxin Countyꎬ Baoxu

            尾杉 (Fig. 1: A-C)                                   Townꎬ Jing ̄Yang ̄Cun Primary Schoolꎬ 10 Jun. 2014ꎬ
                 Type: China. Guangdongꎬ Xinyiꎬ 14 Apr. 1931ꎬ  WAH017 (Holotype: IBSC!ꎻ Isotype: IBSC!).
            S. P. Ko 51291 ( Holotype: PE!ꎻ Isotypes: PE!ꎬ         Plants epilithicꎬ about 14 cm tall. Rhizomes shortꎬ
            IBK!ꎬ SZ!).                                        erectꎬ covered with lanceolate and black brown scalesꎬ
                 Epiphytic on rocks under forests. Stems caespitoseꎬ  scales margin entire. Leaves clusteredꎬ about 5-11 cm
            1- 3 ̄forked. Leaves spirally arrangedꎬ sporophylls and  longꎬ about 1 mm thickꎬ glossy and smooth. Lamina 1 ̄
            trophophylls distinctly dimorphic. Trophophylls elliptic ̄  pinnateꎬ odd ̄pinnate or paripinnateꎬ pinnae 9 - 14ꎬ
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