J Syst Evol ›› 2006, Vol. 44 ›› Issue (4): 437-442.doi: 10.1360/aps050066

• Research Articles • Previous Articles     Next Articles

On the circumscription of Machilus and

WEI Fa-Nan, TANG Sai-Chun   

  1. (Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and the Chinese Academy of Sciences, Guilin 541006, China)
  • Received:2005-04-15 Online:2006-03-16 Published:2006-07-18

Abstract: The circumscription of Machilus Nees and of Persea Mill. (Lauraceae) has long been in dispute. In this paper, the generic boundary between Machilus and Persea is discussed. Machilus and Persea are two distinct genera different in some important characters. The perianth-segments in the genus Machilus are equal or subequal, rarely with the outer whorl conspicuously shorter than the inner whorl, and the segments at fruiting stage become chartaceous, rarely thinly coriaceous, elongated, strongly reflexed, rarely patent and not reflexed, almost persistent, rarely deciduous, and if deciduous, the perianth-segments of both outer and inner whorls fall from the base; the style is deciduous early. The species in this genus are distributed in tropical and subtropical Asia. On the contrary, the perianth-segments in the genus Persea are very unequal, with the outer whorl conspicuously shorter than the inner whorl, rarely subequal, and the segments at fruiting stage become coriaceous to lignescent, rarely thinly coriaceous, patent or erect, almost not reflexed, mostly persistent or falling 1/3 to 1/2 the distance from the base of the inner whorl perianth-segments, rarely wholly falling from the base; the style is sometimes persistent. The species in this genus are native to America. Two new combinations, Machilus balansae (Airy Shaw) F. N. Wei & S. C. Tang and M. sumatrana (Kosterm.) F. N. Wei & S. C. Tang, are proposed.

Key words: Lauraceae, Machilus, Persea, generic circumscription, new combination

[1] Yu-Xiao Zhang, Peng-Fei Ma, Thomas Havermans, Maria S. Vorontsova, Ting Zhang, Olinirina Prisca Nanjarisoa, De-Zhu Li. In search of the phylogenetic affinity of the temperate woody bamboos from Madagascar, with description of a new species (Bambusoideae, Poaceae) . J Syst Evol, 2017, 55(5): 453-465.
[2] Chuan Chen, Min-Qi Cai, Bo Xu, Xin-Jie Jin, Rui-Hong Wang, Pan Li, Yun-Peng Zhao, Cheng-Xin Fu. Systematic position of Oreosolen (tribe Scrophularieae, Scrophulariaceae) based on nuclear and plastid sequences . J Syst Evol, 2017, 55(5): 446-452.
[3] ,Zhong-Jian LIU, Li-Jun CHEN. Singchia and Gunnaria, two new genera of Orchidaceae . J Syst Evol, 2009, 47(6): 599-604.
[4] Zhong-Jian LIU, Sing-Chi CHEN, Li-Jun CHEN. Ypsilorchis and Ypsilorchidinae, a new genus and a new subtribe of Orchidaceae . J Syst Evol, 2008, 46(4): 622-627.
[5] DENG Yun-Fei, WANG Hong, ZHOU Shi-Shun. Two newly recorded species of Strobilanthes (Acanthaceae) from China . J Syst Evol, 2007, 45(6): 849-854.
[6] CHEN Wen-Hong, SHUI Yu-Min, ZHOU Lu-Men. Additional notes on Melastomataceae of China . J Syst Evol, 2007, 45(4): 587-592.
[7] CAI Lian-Bing, ZHANG Tong-Lin. Taxonomic notes on two taxa of Leymus (Poaceae) from China . J Syst Evol, 2007, 45(3): 376-382.
[8] JI Yun-Heng, ZHOU Zhe-Kun, LI Heng*. Paris xichouensis, a new combination of Trilliaceae from China . J Syst Evol, 2006, 44(5): 612-613.
[9] WANG Wen-Tsai. Notes on the genus Clematis (Ranunculaceae) (VI) . J Syst Evol, 2006, 44(3): 327-339.
[10] LI Zhi-Ming, LI Jie, LI Xi-Wen. Polyphyly of the genus Actinodaphne (Lauraceae) inferred from the analyses of nrDNA ITS and ETS sequences . J Syst Evol, 2006, 44(3): 272-285.
[11] YANG Yong*, ZHANG Li-Yan. Notes on the publication date of four names of Lauraceae from China . J Syst Evol, 2005, 43(6): 565-566.
[12] WANG Yong, LI Zhen-Yu, WU Jin-Qing, HUANG Hong-Wen1*. Plantago fengdouensis, a new combination in the . J Syst Evol, 2004, 42(6): 557-560.
[13] LI His-Wen, SHUI Yu-Min. Alseodaphne huanglianshanensis, a new species of the Lauraceae from Yunnan, China . J Syst Evol, 2004, 42(6): 551-554.
[14] ZHANG Xian-Chun, ZHANG Gang-Min. A new combination in Leptolepidium (Pteridophyta: Sinopteridaceae) . J Syst Evol, 2002, 40(3): 286-288.
[15] HONG De-Yuan. Xizangia bartschioides (Hand.-Mazz.) D. Y. Hong, a new combination in Scrophulariaceae . J Syst Evol, 2001, 39(6): 544-546.
Full text



[1] NIE Lei LIU Hong-Xian PENG Shao-Lin. Enhancement of Drought Resistance in Pomelo Seedlings by CPPU[J]. Chin Bull Bot, 2001, 18(01): 90 -95 .
[2] LIU Jun HUANG Shang-Zhi FU Jia-Rui TANG Xue-Jun. Advances on Relation between Seed Vigor and Proteins[J]. Chin Bull Bot, 2001, 18(01): 46 -51 .
[3] Han Yu-qin;Yu Shi-xuan;Liu Wen-ping and Zhao Ri. Influence of Culturing Temperature on the Regeneration Frequency of Pollen Plants of Spring Wheat[J]. Chin Bull Bot, 1994, 11(01): 51 -53 .
[4] Huang Tian-fang. The Preliminary Research into the Greening of the Lotus (nelumbo Nucifera Gaertn.) Seed Embryo ''[J]. Chin Bull Bot, 1995, 12(03): 48 -50 .
[5] Wu Renye, Sun Yuanfen, Zheng Jingui, Deng Chuanyuan, Ye Dapeng, Wang Qingshui. Relationship Between Negative Air Ion Generation by Plants and Stomatal Characteristics Under Stimulation of Pulsed Electrical Field[J]. Chin Bull Bot, 2017, 52(6): 744 -755 .
[6] Xiangdong Luo, Liangfang Dai, Yong Wan, Biaolin Hu, Fosheng Li, Xia Li, Jiankun Xie. Cytological Studies of Male Gametogenesis and Development in the Reciprocal Interspecific Hybrid F1 of Dongxiang Wild Rice (Oryza rufipogon) and Oryza sativa[J]. Chin Bull Bot, 2011, 46(4): 407 -412 .
[7] Li Bo-nian Gao Jing-cheng and Cheng Chi-bo. Preparation of SEM Specimen from Plant Leaves[J]. Chin Bull Bot, 1988, 5(02): 119 -121 .
[8] Liu Jian-hua. The Experiments of the Cold-Resister Applied to Rice Seedling Raising in Yohong District of Shenyang[J]. Chin Bull Bot, 1994, 11(特辑): 109 -111 .
[9] Cui Ying-guo Wang Yuan-xi Mei Jin-long. The Application Studies of the Cold-Resister CR-4 For Rice Seedling Culture in Tongling County[J]. Chin Bull Bot, 1994, 11(特辑): 55 -57 .
[10] Zhang Shang-hong. Ecology and Evolutionary Biology[J]. Chin Bull Bot, 1990, 7(04): 7 -9 .