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Comparative study of fruit wall structure in Lapsana L. and Lapsanastrum J. H. Pak & K. Bremer (Asteraceae; Lactuceae)  

Pak, Jae-Hong (Department of Biology, College of Natural Sciences, and Research Institute for Dokdo & Ulleungdo Islands, Kyungpook National University)
Choi, Kyung (National Arboretum)
Ito, Motorni (Department of General System Studies, The University of Tokyo)
Publication Information
Korean Journal of Plant Taxonomy / v.38, no.4, 2008 , pp. 359-369 More about this Journal
Abstract
The mature fruit wall structures were investigated in Lapsana communis, its six subspecies and the four species of Lapsanastrum (Asteraceae; Lactuceae). Lapsanastrum differs from Lapsana communis in some features: two or three protrudent costae verse equally developed costae, hairly versus glabrous exocarp, respectively. Moreover, Lapsana has no sclerenchymatous‐fiber cells in mesocarp, while Lapsanastrum has sclerenchymatous fiber cells. The differences in fruit wall structure between Lapsana and Lapsanastrum obviously support the separation of Lapsanastrum from Lapsana s. lat.
Keywords
Asteraceae; costae; fruit wall anatomy; Lapsana; Lapsanastrum;
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  • Reference
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