Page 10 - 《广西植物》2022年第10期
P. 10

1 6 2 8                                广  西  植  物                                         42 卷




























































    A. Habitꎻ B. Plants with wide wing at the base of leafꎻ C. Microsporangiumꎻ D. Megasporangiumꎻ E. Liguleꎻ F. Transection of rhizome
    (3 ̄lobed)ꎻ G. Transection of leaf baseꎻ H. Chromosomes.

           Fig. 2  Morphological and anatomic characteristics of Isoëtes xiangfei Y.H. Yanꎬ Y.F. Gu & J.P. Shu


   3  Key to Isoëtes of China


   (1) Individual diploid.   (2)
   (1) Individual polyploid.   (6)
   (2) Megaspore levigate or just tuberculate ̄regulate.   (3)
   (2) Megaspore with various types of ornamentation.   (4)
   (3) Leaves 2-5 cm longꎬ microspores echinate.   I. hypsophila
   (3) Leaves 3-18 cm longꎬ microspores echinate to cristate.   I. shangrilaensis
   (4) Megaspore tuberculate ̄cristateꎬ just distributing in Taiwan.  I. taiwanensis
   5   6   7   8   9   10   11   12   13   14   15