Epidermal Characters of Rattan Stems and Their Taxonomic Implications

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Epidermal Characters of Rattan Stems and Their Taxonomic Implications

LIU Cheng-Gang, HU YU-Shi, LIN Jin-Xing

Received:1900-01-01 Revised:1900-01-01 Online:1998-11-10 Published:1998-11-10
Contact: LIU Cheng-Gang

Abstract

Abstract:

The stem epidermal characters of 21 species belonging to three genera (Calamus,

Daemonorops, Plectocomia) from China were investigated. The results show that the ar-

rangement of epidermal cells, stomatal types and occurrence of reflective body are of taxo-

nomic significance. Based on these features, epidermal cells of rattan stems can be divided

into three types and three subtypes. (1) Plectocomia-type: epidermal cells rectangle, wall-like

arranged; stomata tetracytic, found in P.himalayana Griff., P.microstachys Burret.

(2) Daemonorops-type: epidermal cells irregularly quadrilateral, net-like arranged; stomata

tetracytic, found in D. margaritae(Hance) Becc., D. jenkinsiana (Griff.) Mart. (3)

Calamus-type: Subtype A: epidermal cells hexagonal, net-like arranged; stomata tetracytic

or paracytic, found in C. henryanus Becc., C. tetradactylus Hance, C. viminalis Willd.

var. fasciculatus(Roxb.) Becc., C. flagellum Griff., C. gracilis Roxb., C. dioicus

Lour., C. melanoloma Mart., C. yunnanensis S. J. Pei et S. Y. Chen, C. nambariensis

Becc. var. yingjiangensis S. J. Pei et S. Y. Chen, C. multinervis Becc., C. nam-

bariensis Becc. var. xishuangbannaensis S. J. Pei et S. Y. Chen, C. balansaeanus Becc.

Subtype B: epidermal cells rectangle, wall-like arranged, with the long axes parallel to stem

axes; stomata shuttle tetracytic, found in C. australis Mart., C. bonianus Becc., C.

rhabdocladus Burret, C. compsostachys Burret. Subtype C: epidermal cells rectangle, anti-

clinal wall curved, wall-like arranged, with the long axes parallel to stem axes, found in C.

caryatoides Becc. In addition, the taxonomic implications of epidermal characters are dis-

cussed. It is possible to distinguish Calamus and Daemonorops by stem epidermal characters.

Key words: Rattan stem, Epidermal cells, Stomata, Taxonomic implications, Calamus

LIU Cheng-Gang, HU YU-Shi, LIN Jin-Xing. Epidermal Characters of Rattan Stems and Their Taxonomic Implications[J]. .

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