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陈介 《中国科学院研究生院学报》1983,21(4):416-422
In this paper, the present writer has discussed the lemurian intercontinental discontinuous distribution of the genus Medinilla of Melastomataceae between Tropical Asia and Tropical Africa. It appears to be that the genus was first brought to Eurasia continent from Africa continent as a result of Indian Plate drift. Therefore we conjecture that the genus probably occurred in Upper Cretaceous and its birthplace is probably in the southern part of Gondwanaland. In addition, we have reduced the genus Pseudodissochaeta M. P. Nayar published in 1969, because in this taxon the extra-ovarial chambers may go down to the middle or to the base of the ovary, as in other genera of Melastomataceae. Besides, no differences in pollen have been found between the taxon and the genus Medinilla. 相似文献
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本文报道了杭子梢属Campylotropis Bunge国产10种1变种的染色体数目，其小孢子染色体数目为n=11，体细胞染色体数目为2n=22。 在光果小雀花C．polyantha var．leiocarpa中发现有少数个体为2n=23的非整倍体。 相似文献
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本文着重讨论山豆根属植物的分类、分布、系统亲缘及起源等问题。对本属的分类历史和”山豆
根”一名的由来作了回顾和考证．按中国古典植物文献，”山豆根’指的是Euchresta japonica 。
我们对山豆根属进行一次清理，在本文共报道4种3变种，其中发现一新变种——短管山豆根
Ｅ.tubulosa Dunn var.brevituba C.Chen，井以萼管的有无建立I.山豆根组sect．I．Euchrestae(3种1变
种)及II．管萼组sect．II．Tubulosae(1种2变种)。
山豆根属的现代分布中心在我国中部及南部，可能是第三纪或略早一些的古热带山地森林植物区
系的成员。推测本属可能出现于晚白垩纪，可能是华夏起源。本属的分布区正好处于 “华莱士线”的西
侧，从古地理的资料告诉我们大约在五千万年前，新几内亚和澳大利亚还处在向北移动的状态，这时本
属已遍布东亚和东南亚地区，因此，新几内亚和澳大利亚等地没有本属的分布，这一分布格局正好又一
次证明，在这一地区的诸多的生物地理分界线中，”华莱士线’更符合自然，使我们更清楚的认识到”华莱
士线”的实际意义不仅是劳亚古陆与冈瓦纳古陆的分界线，而且还是亚洲与澳大利亚地区劳亚古陆植物区系与冈瓦纳古陆植物区系的分界线。 相似文献
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In this paper, natural distribution of the genus Calliandra Benth. and anew record species, Calliandra umbrosa, from China are reported. 相似文献
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陈介 《中国科学院研究生院学报》1964,9(1):1-12
The purpose of the present paper is to discuss the systematic position of the genus
Schnabelia originally proposed by H. Handel-Mazzatti in 1921, who considered it as be-
longing to the family Verbenaceae, a point which he further emphasized in 1936. How-
ever, in his paper on the Chinese verbenaceous plants (1932), Prof. Pei Chien thought
the genus should be removed from Verbenaceae into Labiatae and allied it with such
genera as Ajuga and Teucrium on the ground that it also has deeply lobed ovary. Since
then botanists on Chinese plants, such as Prof. Y. Z. Sun, F. C. How, etc. have always
considered Schnabelia Hand.-Mazz. as a genus of Labiatae.
The present writer has recently studied the genus, comparing its morphology of
ovary, calyx lobes, pedicels, pollen grains, etc. with a number of verbenaceous genera,
and comes to the conclusion that the genus should belong to Verbenaceae as H. Handel-
Mazzatti first proposed and that it is closely allied to the genus Caryopteris, especially
C. nepetaefolia (Benth.) Maxim. Moreover, he considers that the deeply lobed ovary
is not at all a good character even for generic separation, for several genera in Ver-
benaceae, such as Caryopteris, Clerodendron, just like Teucrium and Ajuga of Labiatae,
also have deeply lobed ovaries.
From the ample herbarium material, the present writer discovered for the first time
that the genus Schnabelia has two types of flowers, cleistogamous and chasmogamous.
The original founder of the genus did not know this peculiar floral character, as not
mention of it was made in the generic diagnosis. Chienodoxa Sun (1951) proves to be
the present genus, which is based upon the cleistogamous type of flowers of an allied or
perhaps the same species.
相似文献
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我参加西双版纳的生物考察队,出發的时候,北京刚下过一場大雪,一般生物都还在冬眠,但是在祖国的南方,云南南部的西双版納,却是另有一番景象。这里的气候非常溫和,田野里生长着各种各样的花草,鳥語虫声扣人心弦。到处是一丛丛浓密的森林和一片片青綠的草原。 相似文献
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