中国藓类植物一新记录种——芒果树生藓

Erpodium mangiferae C. Muell.(Erpodiaceae)——a newly recorded species from China

关键词:  芒果树生藓, 树生藓属, 新记录, 中国

Key words:  Erpodium mangiferae C. Muell., Erpodium, new record, China

摘要:

报道产自贵州省的中国藓类植物一新记录种——芒果树生藓(Erpodium mangiferae)。树生藓科(Erpodiaceae)隶属于变齿藓目(Isobryales)木灵藓亚目(Orthotrichinales),该科全世界共有5属24种,主要分布在热带地区。中国报道有3属4种。该科的树生藓属(Erpodium),在我国曾经有过2种的记录,被认为是细鳞藓[Solmsiella biseriata(Austin)Steere.]和钟帽藓[Venturiella sinensis(Vent.)C. Müll.]的异名。2004年熊源新等人在贵州省罗甸县红水河谷采到1号树生藓科标本,最终鉴定为芒果树生藓(E. mangiferae C. Muell.)。此次发现也为树生藓属在中国的新分布记录。至此,我国的树生藓科共有4属5种。该文根据对标本的显微观察提供了详细的形态描述和各部分细节线条图,并对该种的分布状况进行了简要的讨论。根据资料,该种主要分布于印度南部、中部、北部和东北部,该种的发现地“贵州罗甸县红水河谷”从经纬度上看,与此前报道的最北分布地印度阿萨姆邦基本在同一纬度上,仅在经度上相差约10°,距离上相差约1 400 km。该种与Erpodium glaziovii的外形相似,但根据雌苞叶与营养叶的尺寸比较,以及叶片细胞中是否存在原始小囊(primordial utricle)等可将两者区分开。

Abstract:

Erpodium mangiferae(Erpodiaceae)was reported as a new record species in China from Guizhou Province. Erpodiaceae belongs to Orthotrichinales, Isobryales and consists of five genera and 24 species of Erpodiaceae mosses which are known all over the world. They are mainly distributed in the tropical regions and among them, three genera and four species are currently recorded in China. Two species of Erpodium was reported as synonyms of Solmsiella biseriata(Austin)Steere. and Venturiella sinensis(Vent.)C. Müll. One Erpodiaceae specimen was discovered by Professor Xiong YX and ect. in Red River canyon of Luodian Town of Guizhou Province and finally was identified as E. mangiferae C. Muell. which was the first record in China. At the last, Erpodiaceae included four genera and five species in china. In this paper,detail morphological characteristics and the specific line description of each part of the sample were provided by microscope observation and the distribution feature of it was discussed. In the terms of the references,E. mangiferae C. Muell.was mainly located in the south,mid,north and northeast of India. From the latitude and longitude, this discovery site, Red River Canyon of Luodian Town of Guizhou Province is similar at the latitude to the most north distribution Assam of India and apart from the Assam about 10° at the longitude or about 1 400 km in the distance. This species was familiar with Erpodium glaziovii in the appearance,but compared the size of the perichaetial leaves and foliage leaves and whether they has primordial utricle or not with it, E. mangiferae C. Muell. are greatly different from Erpodium glaziovii.