Monographs Details:
Authority:
Koyama, Tetsuo M. 1966. The systematic significance of leaf structure in the Cyperaceae-Mapanieae. Mem. New York Bot. Gard. 15: 136-159.
Koyama, Tetsuo M. 1966. The systematic significance of leaf structure in the Cyperaceae-Mapanieae. Mem. New York Bot. Gard. 15: 136-159.
Family:
Cyperaceae
Cyperaceae
Description:
Species Description - Structure resembling that of Hypolytrum nudum, differing from it in the following particulars: median adaxial surface consisting of 2-layered swollen translucent cells, the cells of epidermal layer round to transversely oval, the median hypodermal cells (Fig. 12, b) 4 to 6, oblong or bulliform; adaxial hypodermis 2- or in part 3-layered, the component cells round-hexagonal or round-pentagonal, tending to be oblong or bulliform above vascular sclerenchyma; abaxial hypodermis 1-layered, scarcely sclerified except on both sides of abaxial median costa; abaxial girders supporting lateral costal vascular bundles deeply crescentiform with extended margins.
Species Description - Structure resembling that of Hypolytrum nudum, differing from it in the following particulars: median adaxial surface consisting of 2-layered swollen translucent cells, the cells of epidermal layer round to transversely oval, the median hypodermal cells (Fig. 12, b) 4 to 6, oblong or bulliform; adaxial hypodermis 2- or in part 3-layered, the component cells round-hexagonal or round-pentagonal, tending to be oblong or bulliform above vascular sclerenchyma; abaxial hypodermis 1-layered, scarcely sclerified except on both sides of abaxial median costa; abaxial girders supporting lateral costal vascular bundles deeply crescentiform with extended margins.
Discussion:
Note. Of all Mapanioid species examined H. strictum is the only example in which some of swollen dermal cells are bulliform. H. spongiosum, which is not described here, also exhibits a structure similar to those of both H. nudum and H. strictum, but its median adaxial translucent cells are narrowly rectangular.