Study on the Systematic Position of Tetraena Maxim

Study on the Systematic Position of Tetraena Maxim

Ma Yu-Chuan, Zhang Shou-Zhou

(Biology Dcpartment, Inner Mongolia University, Hohhot)

Received:1900-01-01 Revised:1900-01-01 Online:1990-03-10 Published:1990-03-10
Contact: Ma Yu-Chuan

Abstract

Abstract:

Tetraena Maxim. is an endemic genus of Inner Mongolia and the desert region

of Central Asia. It is also a rare and endangered plant. Some botanists had made some research

on the systematic positions of this genus, but their views are debatable. Through a comprehensive

study: research history, morphology (pistil, fruit), pollen grains, chromosomes, the authors sug-

gest that this genus be separated from Zygophylloideae (Zygophyllaceae, Takhtajan. 1987) and

a new subfamily-Tetraenoideae be set up for it. A key to subfamilies of Zygophyllaceae

(sen. str.) is provided. The systematic position of Tetraena Maxim. is: Rutales-Zygophyllaceae

-Tetraenoideae-Tetraena.

Key words: Tetraena, Pollen grain, Chromosome, Systematic position, Tetraenoideae

Ma Yu-Chuan, Zhang Shou-Zhou. Study on the Systematic Position of Tetraena Maxim[J]. .

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