共查询到20条相似文献，搜索用时 612 毫秒
1.
2.
对中国兰科植物新种云南巾唇兰Pennilabium yunnanense S.C.Chen&Y.B.Luo作了
描述和绘图。该新种与P.acuminatum（Ridley）Holttum较为接近，区别点在于具较小的花朵
，直径仅3cm;花瓣白色且上面有深紫色斑点，以及唇瓣侧裂片顶端有流苏。 相似文献
3.
4.
新种墨脱毛兰可能是足茎毛兰的“异常整齐花”型。 “异常整齐花”现象在兰科中时
有所见，在不同分类群中情况各异，至今尚未见系统的研究。本文认为辐射对称花被是兰科的
正常特征之一，主要见于原始的种类和少数进化的种类，也不同程度地存在于“异常整齐花”实
体中。具辐射对称花被的兰科植物大多数不是“异常整齐花”型，判断时要参酌其他特点，持慎
重态度。兰科“异常整齐花”有两种情况，一是异常型，亦即正常植株中仅偶见“异常整齐花”，
或同一个种可同时产生“异常整齐花”植株与正常植株，两者并存。另一种情况是正常型，亦即
只产生“异常整齐花”，而无正常的两侧对称花。后者意味着在进化过程中的一种飞跃，即形成
了新植物。对此最好作为独立的种处理，特别是在它的来源还不清楚的情况下更是如此。目
前所认为的一些所谓“异常整齐花”实体，大都是推测而已，其中有些或许在将来会被证明为正 常的、原始的植物。 相似文献
5.
郎楷永 《中国科学院研究生院学报》1998,36(5):449-458
笔者曾在1994年发表的“兰科植物区系中一些有意义属的地理分布格局的研究”一文中介绍了
此新亚属——显柱舌唇兰亚属的分布格局及其与舌唇兰亚属的区别。现将它正式发表。此新亚属含12种,其中1种为新组合种。 相似文献
6.
7.
乌蒙杓兰及其近亲种 总被引：1，自引：0，他引：1
陈心启 《中国科学院研究生院学报》1985,23(5):369-375
In addition to describing a new species, Cypripedium wumengense, as well
as a new variety, C. bardolphianum var. zhongdianense, nomenclatural and taxonomic
notes are made on its allies and the division to which they belong. They are ltrge]y
found in the Hengduan Mountains in southwestern China, characterized by the absence
of bract, havirg lip more or less covered with small wart-like outgrowths, and that as
the capsule matures the scape becomes much elongated. Six species of this group have
hitherto been reported, of which, however, C. ebracteatum and C. nutans are regarded
here as conspecific with C. fargesii and C. bardolphianum respectively. Thus, including
the new taxa described here, it composes five species and one variety: C. bardolphianum
W. W. Sm. et Farrer (var. bardolphianum and var. zhongdianense S. C. Chen), C. mic-
ranthum Franch., C. fargesii Franch., C. margaritaceum Franch. and C. wumengense
S. C. Chen. They are all grouped here into the same section, Sect. Trigonopedium
(Franch.) Pfitz., the oldest legitimate name of this group in the rank of section. 相似文献
8.
Cypripedium daliense S. C. Chen et J. L. Wu, a new Species ofOrchidaceae is described with illustrations. 相似文献
9.
讨论了北美火烧兰 Epipactis gigantea、卵叶火烧兰 E．royleana和大叶火烧兰 E．mairei之间的异同。过去被许多作者认为是北美火烧兰 E．gigantea和卵叶火烧兰 E．royleana的中国植物实际上应是大叶火烧兰 E.mairei。卵叶火烧兰在中国仅局限于西藏东南部。 相似文献
10.
11.
12.
通过刺激——反映（S-R）联结,每个人在学习历程中建立起一系列习得性的对自身行之有效的学习策略和学习习惯。作为教师,针对学生不同学习类型的认识,可以更好的引导学生,帮助他们认识自己,发掘自身潜质,形成自己独创性的良好学习习惯,从而极大的发挥其主观能动性。 相似文献
13.
14.
15.
16.
17.
18.
向秋云 《中国科学院研究生院学报》1987,25(2):125-131
Cornus L. s. 1. is a large polytypic genus. The classificantion of which has been
so different that some authors recognize several separate genera, while others treat them as ei-
ther subgenera or sections. New evidence from many disciplines such as palynology, cyto-
logy, wood anatomy and embryology supports the view that the genus should remain in the
broad sense. I basically agree with the treatment by Ferguson (1966b) before my finishing
a comprehensive study on Cornus L. s. 1. except for supporting the separation of subgenus
Afrocrania as an independent genus. A new subgenus Sinocornus Q. Y. Xiang, containing
one species, C. chinensis Wangerin, is established here on account of its inflorescence axillary
and different from the other members of the genus which all have terminal inflorescences only.
The inflorescence developed from a terminal bud implicates the sympodial nature of axis of
stem and the one from an axillary bud the monopodial one. It is reasonable to regard the
character as of subgeneric value. Also a new combination, Cornus subgen. Syncarpea (Na-
kai) Q. Y. Xiang, is proposed here as a substitute for Cornus subgen. Benthamia (C. B. Clar-
ke) Schneider used for a long time. Because the valid publication of the former name subgen.
Syncarpea Nakai is earlier than the latter one. The types of inflorescences of 8 subgenera re-
presented by type or selected species are illustrated. 相似文献
19.
20.