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›› 2000, Vol. 38 ›› Issue (3): 236-241.

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Systematic position of Nannoglottis Maxim. s.l. (Asteraceae): karyomorphological data

LIU Jian-Quan, HO Ting-Nong, LIU Shang-Wu   

  • Received:1900-01-01 Revised:1900-01-01 Online:2000-05-10
  • Contact: LIU Jian-Quan

Abstract:

This paper describes for the first time the karyomorphology of 4 populations of 2 species
of Nannoglottis Maxim. s. l. The two species both show the resting nuclei of the complex chromo-
center type and the mitotic prophase chromosomes of the interstitial type. The karyotype formula of
N. gynura is 2n = 18 = 14m + 2sm + 2st(SAT) in two populations while that of N. carpesioides is
2n = 18 = 14m + 2sm(2SAT) + 2st in two populations. The two species under study represent two
sections of Nannoglottis s. l. N. gynura, the only species of sect. Stenolepis, is considered as the
most primitive member of the genus. Accordingly, the basic chromosome number of the genus might
be x＝9. Karyomorphological data indicate that Nannoglottis should be placed in the tribe Astereae
rather than in the Inuleae and the Senecioneae.

Key words: Nannoglottis Maxim., Karyomorphology, Tribal classification

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