摘要:

SummaryThe technique of somatic cell hybridization or the fusion of protoplasts of different plant species has reached the stage that it may be exploited by systematists for experimentally interpreting phylogenetic relationships of highly divergent lineages. The value of this technique is discussed in relation to others currently employed, and in relation to what we might expect to find at the levels of proteins, secondary products, and morphology based upon our knowledge of plant hybrids and animal hybrid cell cultures.

ISSN:0040-0262    

DOI:10.2307/1218333

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.1002/j.1996-8175.1975.tb04082.x

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThe chromosomes of sixteen species of nine genera of Lauraceae were studied morphologically at interphase, prophase and metaphase. The chromosomes ofCassytha filiformiswere found to show different morphological characteristics in comparison with the other fifteen species, although the basic number of its chromosomes was the same,i.e., x = 12. The karyomorphological evidence in these species coincides with the proposal of Melchior (1964) to divide the Lauraceae into two subfamilies, Lauroideae and Cassythoideae.

ISSN:0040-0262    

DOI:10.2307/1218335

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryA number of recent publications have erroneously stated that the Orchidaceae are characterized by stornata that lack subsidiary cells. The situation is clarified in this article by information obtained from the study of development of the stomatal complex inLudisia discolorandSpiranthessp., representatives of the subfamily Neottioideae of the Orchidaceae, as well as by studies of mature stomata of five additional genera of the Neottioideae. These developmental studies document the presence of mesoperigenous subsidiary cells in the Neottioideae and also substantiate the presence of mesoperigenous subsidiary cells in at least one group of the monocotyledons.

ISSN:0040-0262    

DOI:10.2307/1218336

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1218337

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1218338

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.1002/j.1996-8175.1975.tb04087.x

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.1002/j.1996-8175.1975.tb04088.x

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryOther than the insectivorous nature of the three families, there is little evidence supporting an alliance between the Sarraceniaceae, Droseraceae, and Nepenthaceae. Floral morphology and embryology indicate a relationship between the Sarraceniaceae and the Theales. The Sarraceniaceae are best placed as a suborder in the Theales.

ISSN:0040-0262    

DOI:10.2307/1218339

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThe principles of botanical nomenclature proposed by Thouars in his works on orchids are reviewed. Throughout these works Thouars rather consistently coined names according to his own principles, as alternatives to names in accordance with traditional nomenclature. The alternative specific names were used as binary combinations and can be accepted under the present rules of botanical nomenclature. For this reason they must be taken into consideration in cases where the traditionally formed names have earlier homonyms. It is shown that O. Kuntze's interpretation of Thouars' nomenclature is erroneous.

ISSN:0040-0262    

DOI:10.2307/1218340

出版商:Wiley    

年代:2019

数据来源: WILEY