| 摘要: |
| 对中国马尾藻属，真马尾藻亚属，滑托组，丛伞托序族的种类进行系统研究。此族种类的主要特征是生殖托光滑，聚伞状排列在小校上，生殖托柄状部位都有生殖窝。多孢马尾藻是该族的非常特殊种类，它的分校和小分枝上密生刺和羽状分裂的藻叶。文中还报道了一个新种一长干马尾藻。模式标本产自广东省徐闻，还见于海丰。至今为止，丛伞托序族在中国共有两种。 |
| 关键词: 马尾藻属 丛伞托序族 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助，391800号 |
附件 |
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| STUDIES ON THE SARGASSUM OF CHINAIII. FRUTICULIFERAE |
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Zeng Chengkui (C.K. Tseng), Lu Baoren
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Institute of Oceanology, Acadcmia Sinica, Qingdao 266071
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| Abstract: |
| The Chinese species of the Tribe Fruticuliferae of the Malacocarpic Sargassum are reviewed. This tribe is characterized by species with smooth receptacles arranged in bristly (squarrose) cymes, that are pedicellate, but with both axes and branches merging with receptacular tissue. Of the ten species assigned by J. Agardh to this group, Setchell (1936) accepted only two and transfered Sargassum polyporum Montagne to the Tribe. This is a very special Sargassum with spinous branches and very crowded leaves that are mostly pinnatifid, Its type specimen was collected by Gaudichaud at Macao during the Voyage of La Bonite. Montagne (1842) described but did not illustrate this species, which is deposited in the herbarium of Montagne (Paris). According to Setchell (1936) it seems to be an upper branch, or branchlets, of a mature plant, and he did not find anything like a well-developed inflorescence and did not investigate its sex. Our specimens seem to agree with the description of Grunow (1916) and figures of Setchell (1936), though our specimens have no vesicles. According to the description of Grunow, the vesicles of the type specimen are numerous, globular, 2 – 3 mm in diameter, muticous, and supported on a rather long and compressed stipe. According to our specimens collected at Xuwen, Guangdong Province, receptacles are often arranged cymosely on branchlets and are female. Grunow(1916) described the receptacles as racemosely dichotomous filiform and subtorulose and probably male. It seems that we must wait until we obtain some good specimens before we can settle the problem of the receptacles.
A new species, Sargassum longicaulis sp. nov., is reported. It is characterized by its very long main axes (to 6 cm), very long (to 21 cm) deeply pinnately divided primary leaves; its male receptacles forked two to three times, cymosely arranged without any sterile axes or sterile bases. It is related to Sargassum polyporum Montagne, differing in its smooth branches and very long basal leaves. |
| Key words: Sargassum, Fruticuliferae |
