摘要:

SummaryThe discovery of new fossil plant remains, together with new interpretations of previously described forms, suggests that some ideas regarding the origin of land plants need to be modified. Some evidence suggests that perhaps plants with a bryophytic level of organization were on the land as early as the Ordovician. This suggestion is strengthened by a number of Devonian plants that lack tracheide despite possessing a suite of morphological features generally attributed to vascular plants. Such information necessitates that the current classification of early land plants be re‐examined, together with ideas about the origin and subsequent evolution of vascular plants and bryophytes.

ISSN:0040-0262    

DOI:10.2307/1222087

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryA recent classification of the Monimiaceae is considered. Several overlooked aspects of some South American species are pointed out. A ‘new’ genus and a ‘new’ combination are shown to have been already published.

ISSN:0040-0262    

DOI:10.2307/1222088

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryBryophyte systematists have long believed that because both the gametophytic and sporophytic generations are well developed and diverse, the classification of mosses presents difficulties not found in other plants. Often classifications based on the sporophyte are quite different from those based on the gametophyte. Following methods developed by Rohlf, the product–moment correlation between two matrices of similarity values was used as a numerical measure of congruence, and a randomization test was applied to assess its significance. The degree of incongruence between phenetic similarity matrices based independently on gametophytic and sporophytic characters was measured for three published data sets. The similarity matrix correlation coefficients range from 0.07 to 0.21, all indicating a high degree of incongruence. This incongruence is as great as or greater than that reported for classifications based on different life stages or body parts in other groups of plants and animals. For two of the three data sets studied, classifications based independently on gametophytic and sporophytic characters are significantly less congruent than classifications based on randomized subsets of the characters. The differences in phenetic relationships as expressed by the gametophytic and sporophytic generations thus appear to be real rather than being simply an artifact of splitting a homogeneous set of characters into two subsets.

ISSN:0040-0262    

DOI:10.2307/1222089

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryA list of the taxa of Araceae in W. H. Schott's herbarium in Vienna which were lost at the end of World War II is given.

ISSN:0040-0262    

DOI:10.2307/1222090

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThis account concerning the distribution of living or dried collections of Araceae should provide the reader with facts about where the better collections of Araceae are deposited. This information is important, because of the low rate of duplication of aroid collections, and the generally low rate of collection and poor preservation of specimens, resulting generally in few, relatively poorly preserved collections of any given species. This generally translates into need to borrow on a much broader basis for revisionary studies of Araceae. This survey should provide additional details about the locations of Araceae collections which are most likely to yield material of interest to the monographer or to the writers of floristic accounts.

ISSN:0040-0262    

DOI:10.2307/1222091

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryChina is a large country, vast in territory and rich in natural resources. But the country has been isolated from the international botanical community for the past several decades. Since Liberation in 1949 the number of herbaria in China has increased by more than 500%. At the same time an extensive program to inventory the nation's botanical wealth and produce a flora for all of China has been undertaken. This paper attempts to summarize the history of herbaria in China and to make known their current status so that the rich resources they contain may become better known to the world's botanists.

ISSN:0040-0262    

DOI:10.2307/1222092

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryA software package called DIDEA‐FR was written using dBase III/dBase III Plus. DIDEA‐FR includes 36 interconnected program files and is subdivided into two ranges (subdirectories), one for the management of plant data (including seedlists) comprising 11 subranges, the other for the management of address data comprising five subranges. All subranges (input, search for and change of data, print out of various list types, of the seedlist (Index Seminum) and of seed and address labels) work in dialogue mode and automatically. DIDEA‐FR can be managed by a trained part time user.

ISSN:0040-0262    

DOI:10.2307/1222093

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThe diagnostics, ecology, damage caused and controls for the chief pests in herbaria are described. The effectiveness and safety of available pest controls are reviewed. It is shown that a number of chemical controls are less effective than widely believed while the hazards to health and herbarium materials posed by some may often be overlooked. Neither of the currently used specimen poisons, mercuric chloride and lauryl pentachlorphenate are satisfactory. It is shown that pest controllers should integrate chemical methods with safe and effective physical measures. These include having barriers to the entry of flying insects; treating incoming specimens with freezing, microwaves or aerosol insecticides; monitoring pest arrivals using baited traps; restricting breeding by having low relative humidity, dustless floors and sealed steel cabinets containing a fumigant; and periodic eradication by fumigation with methyl bromide.

ISSN:0040-0262    

DOI:10.2307/1222094

出版商:Wiley    

年代:2019

数据来源: WILEY

摘要:

SummaryThe presence of abietane derived diterpenoids in a few members of the large AmericanSalviasubgenusCalosphacesuggests that it may have differentiated from groups ancestral to the Old World salvias or even prior to the differentiation of the groups inSalvia.

ISSN:0040-0262    

DOI:10.2307/1222095

出版商:Wiley    

年代:2019

数据来源: WILEY

ISSN:0040-0262    

DOI:10.2307/1222096

出版商:Wiley    

年代:2019

数据来源: WILEY