国产姜科植物的染色体计数(四)

<正> 本文继续报道对国产姜科植物8属15种所作的染色体计数观察的结果,其中9种是染色体计数的新记录(表1、图1),并初步确定茴香砂仁属Achasma和喙花姜属Rhynchanthus的染色体基数分别为12和11。

REPORTS ON THE CHROMOSOME NUMBERS OF CHINESE SPECISE OF ZINGIBERACEAE (IV)

Chromosome of somatic cells (root tips or young inflorescences) are reported for 15 specise of Chinese Zingiberaceae distributed under 8 genera (Achasma, Alpinia, Amomum, Costus, Kaempferia, Rhynchanthus, Roscoea and Zingiber). Of these, 7 species are new records.Our present records are as follows: Achasma megalocheilos Griff. 2n=48 (Hainan, Guangdong),Achasma yunnanense T. L. Wu & Senjen 2n=48 (Yunnan), Alpinia aquatica (Koen.) Rose. 2n=48 (Yunnan), Alpinia calcarata Rose. 2n=48 (Guangdong), Alpinia intermedia Gagnep. 2n=48 (Hainan, Guangdong), Alpinia japonica (Thunb.) Miq. 2n=48 (Guangxi), Alpinia pumila Hook. f. 2n=48 (Guangdong), Alpinia gtiina-nensis D. Fang ex X. X. Chen 2n=48 (Guangxi), Alpinia zerumbet (Pers. Burtt & Smith 2n=48 (Guangdong), Amomum compactum Soland. ex Maton 2n=48 (introduced from Indonesia), Costus lacerus Gagnep. 2n=18 (Yunnan), Kaempferia elegans Wall.)Bak. 2n=22(Hongkong), Rhynchanthus beesianus W. W. Smith 2n=44 (Yunnan), Roscoea cautleoides Gagnep. 2n=24 (Yunnan), and Zingiber nudicarpum D. Fang 2n=22 (Guangxi).The new basic numbers of chromosomes of the two genera examined,are 12 for Achasma and 11 for Rhynchanthus. They all belong to Trib. Alpineae.All the voucher specimens for the present study are well preserved in the Herbarium of South China Institute of Botany, Academia Sinica.