Spore morphology of pteridophytes from China Ⅱ. Sinopteridaceae

doi:10.7523/j.issn.2095-6134.2001.3.003

Abstract

Abstract:

Spores of 61 species and 6 varieties in 9 genera of the Sinopteridaceae were examined

under scanning electron microscope (SEM). Based on surface ornamentation and other features, the

spores of the Sinopteridaceae are divided into three types. In type Ⅰ , the exospore is smooth and

the surface ornamentation, which is reticulate, cristate, echinate or rugate, is formed by the peris-

pore. All the other genera of this family, except for Onychium and Cryptogramma, have this pat-

tern of spores. In type Ⅱ, the surface ornamentation is formed by both perispore and exospore. This

pattern is found only in Cryptogramma. In type Ⅲ, the perispore is thin and the surface ornamenta-

tion is formed by the exospore. Onychium is characterized by this type of spores. Those genera with

spores of type Ⅰ of the Sinopteridaceae seem to be closely related to each other and should be natu-

ral members of this family. The systematic position of Cryptogramma and Onychium, with spores of

type Ⅱ and type Ⅲ respectively, however, should be reconsidered. Aleuritopteris might be the most

primitive member of the Sinopteridaceae from the evidence of spore morphology.

Key words: Pteridophyte, Spore morphology, Sinopteridaceae, China

YU Jing, WANG Quan-Xi, BAO Wen-Mei. Spore morphology of pteridophytes from China Ⅱ. Sinopteridaceae[J]. , 2001, 39(3): 224-233.

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Spore morphology of pteridophytes from China Ⅱ. Sinopteridaceae

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