カザリシダ類(ウラボシ科)の脈理と毛状体

概要

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Venation and trichomes of five Drynarioid ferns were observed in various stages of juvenile plants, and compared with those of ten allied or related genera. Developmental pattern of the venation of Drynarioid taxa is quite different from that of Microsorium and its closely related taxa in the behavior of the lowermost acroscopic veinlet and the included veinlets at the early juvenile leaves, but fairly coincides with that of Polypodium, although included veinlets are usually single and simple in the latter. Scales on the rhizome are typically clathrate from the early stage of the juvenile plants in Microsorium and its closely related taxa, but soft usual type in Drynarioid taxa and the most of Polypodium. Long multicellular hairs were observed on the juvenile leaves in various Drynarioid ferns such as Photinopteris, Aglaomorpha meyeniana, Dryostachyum pilosa, etc. This type of hairs is totally lacking in Microsorioid ferns, but present in some Polypodium. The Drynarioid ferns share such characteristics as mentioned above with Polypodium. The resemblance between Drynarioid and Microsorioid taxa, on the contrary, seems to be superficial in the respects of these characteristics.
1982-04-20