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作为一个植物科学工作者,呆在实验室摆弄一些仪器、试剂,或坐在办公室敲击键盘处理数据、写点文章固然必不可少,开展野外考察和学术会议交流也十分重要.比起参加会议,野外考察更具有挑战性,充满艰辛甚至冒险.今年8月,鉴于课题研究和交流的需要,在兼顾参加美国秋海棠协会(American Begonia Society,简称ABS)年度大会和美洲黄莲(Nelumbo lutea)野外考察的情况下,我花了3周多时间,圆满地完成了美国科考之旅,收获之多,感触之深,难用言语尽述. 相似文献
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在为编写《Flora of China》伞形科而进行的修订工作中，提出了11个新组合，即矮小丝瓣芹Acronema minus (M. F. Watson) M. F. Watson & Z. H. Pan, 短柄丝瓣芹A. brevipedicellatum Z. H. Pan & M. F. Watson, 川西当归Angelica sinensis var. wilsonii (H. Wolff) Z. H. Pan & M. F. Watson, 云南细裂芹Harrysmithia franchetii (M. Hiroe) M. L. Sheh, 钝叶独活Heracleum candicans var. obtusifolium (Wall. ex DC.) F. T. Pu & M. F. Watson, 中华天胡荽Hydrocotyle hookeri ssp. chinensis (Dunn ex R. H. Shan & S. L. Liou) M. F. Watson & M. L. Sheh, 普渡天胡荽H. hookeri ssp. handelii (H. Wolff) M. F. Watson & M. L. Sheh, 锐棱岩风Libanotis grubovii (V. M. Vinogradova) M. L. Sheh & M. F. Watson, 美脉藁本Ligusticum likiangense (H. Wolff) F. T. Pu & M. F. Watson和线叶藁本L. nematophyllum (Pimenov & Kljuykov) F. T. Pu & M. F. Watson, 无管藁本L. nullivittatum (K. T. Fu) F. T. Pu & M. F. Watson和二色棱子芹Pleurospermum bicolor (Franch.) C. Norman ex Z. H. Pan & M. F. Watson.; 发现了1个新种，即短柄丝瓣芹。此外，还为Pleurospermum govanianum var. bicolor Franch.指定了后选模式。 相似文献
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本文提出了龙胆属两个种的新名称(Gentiana membranulifera T．N．Ho,G．nudicaulisKurz var. assa-
mensis T．N．Ho)和5个变种的新组合[(Gentiana lateriflora Hemsl．var. uncifolia(H．J．Lam)T．N．Ho,
G．sumatrana Ridl．var．humifusa(S．Moore)T．N．Ho,G. quadrifaria Bl．var．wightii(Kusnez．)T．N．Ho,
G．loerzingii Ridl. var．timida(Kerr)T．N．Ho,G．membranulifera T．N．Ho var．recurvata (Kusnez．)T．N．Ho)〕。 相似文献
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卢生莲 《中国科学院研究生院学报》1992,30(6):529-540
Some new taxa of the genus Festuca (Gramineae) are described
from China. They are Sect. Longiglumes S.L. Lu,Sect. Muticae S.L. Lu, Sect.
Sinensis S.L. Lu, Sect, Nitidulae S.L. Lu, and Festuca pubiglumis S.L. Lu, F.
longiglumis S. L. Lu, F.fascinata Keng, F. mutica S.L. Lu, F. sinensis Keng, F.
subalpina Chang et Skvort. ex S.L. Lu, F. chelungkingnica Chang et Skvort. exS.L. Lu. In addition, one new name F. taiwanensis S.L. Lu is included. 相似文献
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马炜梁 《中国科学院研究生院学报》1991,29(4):289-314
本文报道了谷精草属3个新系，7个新种、5个新变种、2个新组合、3个新记录、修正了5个种的特征记载，新归并学名15个，共涉及全国32种8变种中的34个。 相似文献
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横断山区马先蒿属新分类群 总被引：1，自引：0，他引：1
杨汉碧 《中国科学院研究生院学报》1990,28(2):136-144
Six new species, 1 new subspecies and 1 new variety are described in
this paper. They are P. salviiflora Franch. ex Forbes et Hemsl. var. leiocarpa
H. P. Yang (Ser. Salviiflorae Prain), P. rex C. B. Clarke subsp. zayuensis H. P.
Yang (Ser. Reges Li), P. xiangchengensis H. P. Yang (Ser. Cyathophyllae Li), P.
deqinensis H. P. Yang (Ser. Myriophyllae Maxim.), P. weixiensis H. P. Yang(Ser.
pectinatiformes Tsoong), P. rizhaoensis H. P. Yang (Ser. Lyratae Maxim.), P.
gongshanensis H. P. Yang (Ser. Cernuae Li), P. dulongensis H. P. Yang (Ser.
Wilsoniae Li). 相似文献
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根据对中国楼梯草属Elatostema植物标本的研究，将碧江楼梯草E．bijiangense归并入楼梯草E．
involucratum，长叶墨脱楼梯草E．medogense var．oblongum和树志楼梯草E．shuzhii归并入墨脱楼梯草E．
medogense，光茎钝叶楼梯草E．obtusum var．glabrescens归并入三齿钝叶楼梯草E．obtusum var．trilobula-
tum，三裂楼梯草E．sinense var．trilobatum归并入对叶楼梯草E．sinense,赤水楼梯草E．strigulosum var．semitripilinerve归并入伏毛楼梯草E．strigulosum。 相似文献
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本文报道了产自湖南省的轮藻1新种、4新变种、 5个亚洲新记录和8个中国新
记录：四盾轮藻Chara quadriscutula sp．nov., 布氏轮藻柱孢变种 C．braunii Gmelin var．
cylindrospora，var．nov., 松形轮藻湖南变种 C．hydropitys var．hunanensis，var．nov., 腋球丽
藻二型变种 Nitella axilliformis Imahori var．biformis var． nov．, 小果丽藻单果变种N．
microcarpa Braun var．unicarpa，var．nov．以及小果丽藻N．microcarpa Braun，细枝丽藻 N．
leptoclada Braun，安氏丽藻N．annandalei Pal，疏丝丽藻N.confervacea A Braun, 细形丽
藻N．gracilliformis J. Groves，倒置丽藻N．inversa Imahori，武藏丽藻N.musashiensis Mo-
rioka，稀脊丽藻N．paucicostata T. F. Allen，尖头丽藻戈尔梅变种 N． acuminata var．
gollmeriana(A．Br．)Zanev．＆ R．D. Wood，博尔德鸟巢藻Tolypella boldii Sawa，长枝轮
藻Chara longifolia Robinson，匹斯汀轮藻C．pistianensis J．Vilhelm 和格氏轮藻 C.grovesiiPal。 相似文献
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The present paper, mainly dealing with phytogeographical, Cytological and Palynolo
gical studies on Chinese Stachyuraceae, is the first part of a series of contributions to systematics of this family. As we know, Stachyuraceae, a monogeneric family, is endemic to
East Asia, with a strong differentiation in China. Systematic position of the family is still uncertain. Undoubtedly, multidisciplinary studies on it wisl give a better understanding of plant differentiation in East-Asiatic floristic region and systematic position of the family.
The distribution of all the 9 Chinese species of Stachyurus have been studied on the basis of morphogeographical method. The status of some taxa has been changed as follows: Stachyurus chinensis Franch. ssp. latus (Li) Y. C. Tang et Y. L. Cao, stat. nov. S. chinen-sis Franch. Ssp. cuspidatus (Li) Y. C. Tang et Y. L. Cao, stat. nov. S. chinensis Franch. ssp. brachystachyus (C. Y. Wu et S. K. Chen) Y. C. Tang et Y. L. Cao, stat. nov. S. salicifolius Franch. ssp. lancifolius (C. Y. Wu) Y. C. Tang et Y. L. Cao, stat. nov., S. yunnanensis Franch. var. pedicellatus Rehd. and S. oblongifolius Wang et Tang being reduced as synonyms of S. yunnanensis Franch. From morphological point of view, we would consider that sect. Callosurus is more primitive and its present area might be the preservation center of the family.
In this paper the chromosome numbers of 5 taxa, i.e. Stachyurus yunnanensis, S. chinensis ssp. chinensis, S. chinensis ssp. cuspidatus, S. salicifolius ssp. salicifolius, S. retusus, are reported for the first time. Along with the chromosome countings of S. himalaicus and S. sigeyosii by S. kurosawa, we come to the conclusion that all the species so far studied have 24 small somatic chromosomes (2n=24).
The pollen grains of 6 taxa, i.e. Stachyurus yunnanensis, S. obovatus, S. himalaicus, S. chinensis ssp. chinensis, S. salicifolius ssp. salicifolius, S. retusus were also examined. Together with the observations of G. Erdman and Huang Tsengchien on S. himalaicus, it seems that the pollen grains of the genus Stachyurus are rather uniform in morphology. The pollen grains of sect. Callosurus are tricolporoidate, while those of sect. Stachyurusare tricolporate. Two pollen types, representeb by the two sections, though not strongly distinct, may be considered as further evidence of the validity of the two taxa as section.
Sexuality of flowers is also disscussed in the paper. According to our observationon six species, i.e. Stachyurus yunnanensis, S. obovatus, S. himalaicus, S. chinensis, S. salicifolius, S. retusus, the plants are dioecious, which supports T. Makino's observation on S. praecox and H. Hara's on S. himalaicus. Female flowers have relatively large pistils and short stamens with empty anthers, while male flowers have smaller sterile pistils and longer stamens with well developed anthers. 相似文献
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唐亚 《中国科学院研究生院学报》1992,30(5):385-404
本文根据最新研究结果，对国产杜英属植物进行了清理。这里报道的是对《中国植物志》
49(1)杜英属的修订和补充。它包括：(1)纠正3个错误鉴定：Elaeocarpus rugosus Poxb．=E．
apiculatus sensu Merr.；E.sikkimensis Mast.=E.fleuryi sensu H.T.Chang；E.decandrus
Merr.=E.chinensis sensu H.T.Chang pro parte。 (2) 发表1个新种和1个新变种：E．
limitaneioides Y.Tang；E.glabripetalus Merr．var．grandifructusy．Tang． (3)归并了4种2
变种：E．boreali-yunnanensis H．T．Chang归并为E．lacunosus Wall. ex Kurz，E.floribundioides
H．T．Chang归并到E．austro-yunnanensis Hu，E.fengjieensis P.C.Tuan归并至E．duclouxii
Gagnep．，E．kwangsiensis H．T．Chang归并为E.glabripetalus Merr. var．alatus(Knuth)
H. T. Chang，E. glabripetalus Merr. var．teres H.T.H.T.Chang归并为E.glabripetalus
var．glabripetalus，E.prunifolioides Hu var．rectinervis H.T.Chang归并至E.prunifolioidesHu。 (4)报道了一些省级分布新记录；并简单讨论了属下系统。 相似文献
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梁松筠 《中国科学院研究生院学报》1990,28(2):153-158
In addition, two new sections, Echinochlomorphae Y. L. Chang and
Thomsonianae Y. L. Chang, two new combinations, C. duriuscula subsp. rigescens
(Franch.) S. Y. Liang et Y. C. Tang (=C. stenophylla var. rigescens Franch.) and
C. rochebrunii Franch. Subsp. reptans (Franch.) S. Y. Liang et Y. C. Tang (=C.
remotae L. var. reptans Franch.) are made, and C. stenophylloides V. Krecz. is
reduced to C. duriuscula subsp. stenophylloides (V. Krecz.) S. Y. Liang et Y. C.Tang. 相似文献