作 者 ：Hu Yu-Shi
期 刊 ：植物分类学报 1984年 4期
Keywords:Cephalotaxus,
Abstract:
The internal structure and cuticular characters of the leaves of Cephalota-
xus were investigated under light microscope and scanning electron microscope. The
materials used belong to 9 species, 2 varieties and 1 cultivar.
The leaf characters of C. oliveri Mast. are as follows: stomata are amphicyclic
and occasionally monocyclic, the stomatal frequency is 120.6/mm2, the hypodermis is
present, there are a large number of filiform sclereids and a few brachysclereids and
astrosclereids in the mesophyll, the cuticular projections on the lower surfaces are in-
distinct. This species differs from all the other species of Cephalotaxus, in which
stomata are amphicyclic only, the stomatal frequency is 47.3-88.1/mm2, hypodermis
is absent except in C. harringtonia and C. harringtonia cv. ‘Fastigiata’, foliar astroscle-
reids, hrachysclereids asd fibriform selereids may be present or entirely absent, there
are distinct cuticular projections on the lower surface. Based upon the above-mentioned
features, the gross morphology as well as the alkaloids. Cephalotaxus may be divided
into two sections, namely: Sect. Cephalotaxus and Sect. Pectinatae.
In addition, also discussed are following problems: the classification of some species
in Sect. Cephalotaxus, the suggested subdivision of Sect. Cephalotaxus into 4 series,
and the systematic position of Cephalotaxaceae.