共查询到19条相似文献，搜索用时 93 毫秒
1.
根据对Elatostema gagnepainianum H. Schröter模式材料的研究,为它指定了后选模式,并将其处理为藤麻Procris crenata C. B. Robinson的新异名。 相似文献
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本文通过对本属研究历史、形态特征和各类标本的系统研究，确认了M . compactilorus命名模式在中国有分布，发表了2个新种，M . scandens Hsueh et Hui和M . fimbriatus Hsueh et Hui编制了分种检索表。 相似文献
3.
报道了产滇东南斑果藤属的2个中国新记录，即锥序斑果藤Stixis ovata (Korth.) Hall. f. ssp. fasciculata(King) Jacobs和闭脉斑果藤S. scandens Lour. 相似文献
4.
报道南五味子属Kadsura的黑老虎K. coccinea (Lem.) A. C. Smith在印度尼西亚的分布新记录,毛南五味子K. induta A. C. Smith在中国贵州的分布新记录,冷饭藤K. oblongifolia Merrill在中国福建和台湾以及越南的分布新记录,补充或纠正了前人对毛南五味子的形态描述,取消了Saunders对海南黑老虎K. hainanensis Merrill和冷饭藤所作的后选模式。 相似文献
5.
目的:为了促进浙江地产药材研究,更好地利用本地资源。方法:利用历史典籍、地方志,考证和识别地龙藤的名称、起源、分布和用药;同时通过实地考察、利用防谈、调查编目、传统医药文化研究和定量评估。结果:地龙藤最为相似的种类有4种。即:桑科Moraceae薜荔Ficus pumila Linn;卫矛科Celastraceae扶芳藤Euonymus fortunei Hand.-Mazz.;五加科Araliaceae中华常春藤Hederae nepalensis K.Koch.var.sinensis(Tobl.)Rehd.;夹竹桃科Apocynaceae络石藤Trachelospermum jasminoides(Lindl.)Lem.。结论:地龙藤为五加科Araliaceae中华常春藤Hederae nepalensis K.Koch.var.sinensis(Tobl.)Re hd.,理由是该植物从产地、生长习性和性味功效与原文献记载最为接近。 相似文献
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The present paper reports the first record of the genus Hymenopyramis in China.
H. cana is a new record on Hainan Island of Guangdong Province. It grows in deciduous mon-
soon forests or shrubby savanna (western Hainan) at 50 to 150 m alt. 相似文献
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培养学生的创新能力是素质教育的要求,更是新课程理念的要求.如何在初中化学教学中通过实验培养学生的创新能力,本文从平时的化学教学、演示实验中通过对学生的观察、思维、自学等能力方面的培养力求来达到这一目的. 相似文献
11.
Apostasioideae, a small subfamily of Orchidaceae, is largely distributed in tropical
Asia with its northern limit extending to the Ryukyu Islands and south China. The first Chinese
species of this subfamily was reported by E. D. Merrill (1927) based on a specimen collected
from Hainan (McClure 9519, AMES), which he regarded as Apostasia wallichii R. Br. As
later labelled by E. F. de Vogel, it is in fact identical with A. odorata Bl., a widespread spe-
cies also found in southern Guangdong, Guangxi and Yunnan of China. It was not until re-
cently that the true A. wallichii was collected from southwestern Yunnan bordering on Burma,
which is initially reported here. In addition, an interesting new species, A. ramifera S. C. Chen
et K. Y. Lang, is described from Hainan.
The only Chinese species of Neuwiedia has long been known as N. veratrifolia Bl. (of.
Iconographia Cormophytorum Sinicorum 5: 602, t. 8034. 1976, and Flora Hainanica 4 180, t.
1078. 1977), which, however, was considered by de Vogel (1969) to be not found in China. In
de Vogel's revision, no Chinese taxon but a variety, N. zollingeri Rchb. f. var. singapureana
(Baker) de Vogel, is cited with some doubt based on a specimen of Hainan (F. C. How 73122,
in young fruit, AMES). N. zollingeri var. singapureana is in fact quite different from N.
veratrifolia by having glandular hair, much shorter inflorescence and flattened filaments. As
recently pointed out by de Vogel and G. Barretto (in Journ. Taiwan Museum 37: 78. 1984),
the plants found in Hongkong, as well as those in Guangdong and Yunnan, possess glandular
hair and short inflorescence. They are identical with the Vietnamese species N. balansae Gagnep.,
which was reduced by de Vogel to a synonym of N. zollingeri var singapureana. E. F. de
Vogel's suggestion seems to be acceptable except the varietal rank. It is treated here as a se-
parate species, N. singapureana (Baker) Rolfe, according to its fruit and hair characters. Thus
we have altogether one species of Neuwiedia and three species of Apostasia in China, including a new species and a newly recorded one. 相似文献
12.
通过对我国北部各省区所产的杏Armeniaca vulgaris Lam．及野杏 A．vulgaris Lam．var．
ansu(Maxim．) Yϋ et Lu的形态学比较研究结果表明，杏分类群存在较大的变异，在一些标本馆内被
鉴定为野杏的标本实际上包括了一个混杂的类群。本文对杏及野杏的描述作了修订，分出一个新种志丹杏A．zhidanensis C．Z．Qiao et Y．P．Zhu． 相似文献
13.
通过对狭叶沙参复合体进行居群(共46个)采样、引种、栽培实验，生物学特性观察，染色体观察
(已发表)，杂交、同工酶比较、形态性状的定性定量分析、茎解剖和花粉形态的观察，发现：(1)该
复合体主要进行异花授粉，实生苗第二年才抽茎生花；(2)32个居群的染色体计数表明，在辽宁东部、
辽宁西部(绝大部分地区)和山西霍县的居群都为二倍体(2n=34)，而其它地方的居群为四倍体(2n
68)；(3)叶的酯酶同工酶的变异大，和一些形态特征，尤其是叶的形态和大小的变异相似，而种子的酯
酶同工酶则相当稳定；(4)通过9个居群的杂交试验，在狭叶沙参和石沙参四倍体居群间得到了一
些F1种子，而辽宁西部二倍体与上述的四倍体居群间的杂交未产生任何F1种子；(5)性状分析(包括
聚类分析与主成份分析)和茎解剖的研究，揭示了它们在叶、果实、花和种子的形态、髓纤维组织的有无、
叶锯齿和花萼裂片齿的有无和多少等形状上的变异幅度，并据此分辨出8个宗。其中辽宁西部的二倍
体宗形态上相当独特，被提升为种的等级。 其余7个宗，根据不同的分化程度被处理为三个种和5个
亚种；(6)运用杂交指数法分析了石沙参和狭叶沙参在太行山一带杂交的可能性；(7)分析讨论了复合体内各类群的起源和进化关系。 相似文献
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The development of metabolic acidosis during cardio-pulmonary bypass (CPB) is a well recognized but poorly explained phenomenon.
It has been hypothesized that it is purely a development after the delivery of pump prime. A retrospective study was conducted
at our hospital on 68 patients who underwent elective coronary artery bypass grafting (CABG). Sampling of arterial blood was
performed at three time intervals: (T1) Baseline, prior to induction; (T2) 5 minutes after initiation of CPB and prior to administration of cardioplegia solution; (T3) during rewarming prior to weaning
the patient off CPB. Measurements of Na+, K+, Cl−, pH, pCO2, HCO3
−, Base excess, Anion gap, Strong ion difference at each collection point were performed. Results were analyzed in a quantitative
manner. On delivery of pump prime, all patients' developed metabolic acidosis. However, it is very important to distinguish
the metabolic acidosis as their management varies. Anion gap has been found to be useful in managing peri-operative metabolic
acidosis. 相似文献
16.
eterachopsis was proposed by the senior author as an independent genus of
the family Aspleniaceae in 1940 with 2 species. Since then much study on its morpho-
logy, anatomy, gametophyte and palynology has been carried out by Nayar, Bir, Chan-
dra & Nayar and Chang et al., and they are of the opinion that the genus like Ceterach,
is a comparatively primitive element in the family Aspleniaceae. The queer zigzag pa-
tern of cutting of lanceolate fronds appears extraordinary in the family Aspleniaceae,
and also suggests its antiquity in evolution. So far only 3 species (C. dalhousiae, C.
paucivenosa and C. magnifica) are recognized, the former from W. Himalayas, also
known from Africa, while the latter two from W. S. China (Yunnan). However, in
the past forty years the Chinese botanists have discovered 2 more species as new in N.
W. Yunnan, thus bringing the total known species of the genus up to 5. The present
paper is a brief summary on the genus Ceterachopsis, which will be published in detail
in the Flora Sinica vol. 4.
Pteridologists are also divided in their views regarding the generic status of Cete-
rachopsis with 5 well-defined species in Yunnan and the East Himalayas. We prefer
to mintain it as a genus separate from Asplenium on account of its distinct morpholo-
gical features. It is to be hoped that more species may come to light in the mountainsin N. W. Yunnan through further exploration now under way. 相似文献
17.
陈家瑞 《中国科学院研究生院学报》1990,28(6):467-470
作者检查了肉被麻属及球隔麻属的模式及其他大量标本后，认为它们是同一个单种属。
它们均具有环状柱头和肉质的具4一5裂的管状花被，这与它们各自的原描述都有所不同。球
隔麻、球隔麻属及球隔麻亚族应分别被归并作为肉被麻、肉被麻属及肉被麻亚族的异名。与此 同时，肉被麻及肉被麻属的定义也应进行修正。 相似文献
18.
此文包括了缢花沙参Adenophora contracta (Kitag．) J． Z． Qu et Hong 和松叶沙参 A．pinifolia Kitag．两个种。在过去，前者曾被处理为石沙参的变种(A.polyantha Nakai var．contracta Kitag．)。本文通过对它的地理分布、植物体形态和细胞学特征的研究，发现它相当独特。所以，把它处理为种的等级A．contracta (Kitag．) J．Z．Qu. et Hong。后者，曾被洪德元(1983)处理为存疑种。在此被确认为独立的种。 相似文献
19.
This article proposes a syntactic parsing strategy based on a dependency grammar containing formal rules and a compression technique that reduces the complexity of those rules. Compression parsing is mainly driven by the ‘single-head’ constraint of Dependency Grammar, and can be seen as an alternative method to the well-known constructive strategy. The compression algorithm simplifies the input sentence by progressively removing from it the dependent tokens as soon as binary syntactic dependencies are recognized. This strategy is thus similar to that used in deterministic dependency parsing. A compression parser was implemented and released under General Public License, as well as a cross-lingual grammar with Universal Dependencies, containing only broad-coverage rules applied to Romance languages. The system is an almost delexicalized parser which does not need training data to analyze Romance languages. The rule-based cross-lingual parser was submitted to CoNLL 2017 Shared Task: Multilingual Parsing from Raw Text to Universal Dependencies. The performance of our system was compared to the other supervised systems participating in the competition, paying special attention to the parsing of different treebanks of the same language. We also trained a supervised delexicalized parser for Romance languages in order to compare it to our rule-based system. The results show that the performance of our cross-lingual method does not change across related languages and across different treebanks, while most supervised methods turn out to be very dependent on the text domain used to train the system. 相似文献