| 摘要: |
| 我国有记录的苋属植物20余种,主要为外来杂草。苋属植物形态相近,常被误鉴。作者从送检的误鉴的标本中发现2个新外来种,根据拉丁文名种加词释义,分别命名为鲍氏苋(Amaranthus powellii S. Watson)和布氏苋(A. bouchonii Thell.)。鲍氏苋和布氏苋形态相近,分别产自美国西南部和欧洲,雌雄同株,具3～5雌花花被片,花被片不等长,等于或短于胞果,胞果开裂或不开裂。鲍氏苋和布氏苋可通过花被片数目和形态、胞果是否开裂、苞片大小相区分。该文还提供了鲍氏苋和布氏苋的中文形态描述及彩色图片,并对其分布、生境和危害状况进行了报道。 |
| 关键词: 苋属, 外来杂草, 新记录, 鲍氏苋, 布氏苋 |
| DOI：10.11931/guihaia.gxzw201806048 |
| 分类号:Q949 |
| 文章编号:1000-3142(2019)10-1416-04 |
| 基金项目:国家农业标准化项目(NBFW-14-2018); 中国科学院植物研究所基本科研业务费项目(2014JK010, 2017JK038)[Supported by the National Agricultural Standardization Program of China(NBFW-14-2018); Basic Scientific Research Program of Institute of Botany, Chinese Academy of Sciences(2014JK010,2017JK038)]。 |
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| Amaranthus powellii S. Watson and A. bouchonii Thell., two newly naturalized species in China |
|
XU Han1*, LI Zhenyu2
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1. Chinese Academy of Inspection and Quarantine, Beijing 100176, China;2. Institute of
Botany, Chinese Academy of Sciences, Beijing 100093, China
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| Abstract: |
| About twenty Amaranthus species have been recorded in China and most are alien weeds. The morphological characteristics are similar under genus, and often occurrring misidentifications. We found two newly alien species from submitted specimens which were identified as another species. Two Chinese epithets were entitled separately by the Latin names of specific meaning. Amaranthus powellii S. Watson and A. bouchonii Thell., two invasive plants from Southwest USA and Europe separately, are similar on morphology, monoecism, pistillate flowers with 3-5 unequal tepals, equal or short of utricle, utricle dehiscence or indehiscence. Both of them can be distinguished by numbers and shapes of tepals, features of utricles, and shapes and sizes of bracts. In this paper, their Chinese description, color illustrations, key features and distribution and harmful status are provided as well. |
| Key words: Amaranthus, alien weeds, new records, Amaranthus powellii S. Watson, A. bouchonii Thell. |
