摘要:

An investigation of species of the Antirrhineae (Scrophulariaceae), primarily from the point of view of seed morphology, has indicated that the inclusion ofLinaria chalepensisandL. armeniacain sectionVersicoloresis unsatisfactory. Several unusual features of both the seeds and other parts of the plants provide a basis for recognizing a distinct section to include these two species. An overlooked infrageneric taxon ofLinariahas been reinstated as sectionMacrocentrum(C. Koch) D. Sutton. All taxa included in this section are described and illustrated. The significance of the unusual seed morphology is discussed in relation to the affinities of the genus.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01671.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

The anatomy of the leaf epidermis of 49 of the approximately 65 African species ofCombretumsubgenusCacouciais described. This is discussed in relation to the taxonomy of the subgenus, particularly its sectional classification. Of the 17 sections which have been describrd,Campylogyneis now referred to the genusQuisqualis, Argyrotrichais referred toCombretumsubgenusCombretum, andAngolensia, Grandiflora, Mweroensia, ParvulaandTrichopetalaare included with other sections.Combretum grandidieriis referred to the genusCalopyxis. In general the leaf epidermis of speries of subgenusCacouciais of far lower taxonomic value than in subgenusCombretum.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01672.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Epidermal features, mesophyll differentiation and calcium oxalate characteristics of 19 species and 12 hybrids ofSalixare described. The species and hybrids can be distinguished by the presence or absence of the following epidermal features: striated cuticle; stomata; covering trichomes; beaded anticlinal walls, and diosmin‐like njstals. In or near marginal teeth, glandular trichomes are present in all cases. The leaf veins of all specimens examined have calcium oxalate prism sheaths and, with the exception ofS. herbacea, cluster crystals in some cells of the mesophyll. Most sprcies studied in the subgenusSalixshow: both adaxial and abaxial stomata; striated cuticle metopllyll of palisade cells, with little or no spongy mesophyll, but with a well‐defined hypodermis, and absence of thick‐walled, sinuous trichomes. Characteristic features of the subgenusCaprisalixare: abaxial stomata only; epidermal crystals; smooth cuticle; mesophyll diflerentiated into palisade cells and spongy mesophyll and without a hypodermis, and trichomes more numerous and varied than those of the subgenusSalix. Leaves of the two species of the subgenusChaemeliaexamined and those ofS. lapponum, have predominantly anomocytic stomata, whereas all the other leaves studied have predominantly paracytic stomata. The anatomical features described, in conjunction with the morphologiral characters, enable the species and hybrids ofSalixstudied to be autheenti

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01673.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

The essential oils isolated from foliage of various clones of xCupressocyparis leylandziwere analyzed by gas chromatography to determine whether the oils could be used as aids in clonal identification. Several botanical gardens supplied foliage which was submitted to hydrodistillation. The oils were isolated under standardized conditions and then analyzed. Comparison of the oil components (mostly monoterpene hydrocarbons) revealed that it is possible to identify, on the basis of the composition of the monoterpene hydrocarbon mixture, clones 1–6 as a group and clones 10 and 11 individually. The composition of the oils from foliage of the widely propagated clones 1,2, 10 and 11 is given in more detai

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01674.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

The results of attempted hybridization between European species of large‐grained speciesof Lupinus, L. albus, L. angustifoliusandL. luteusand between these and the South American speciesL. mutabilisare described. Pollen‐tube growth in interspecific combinations differed significantly from those after self‐pollination only whenL. luteus, was the female parent. All combinations InvolvingL. mutabilispollen exhibited unilateral compatible pollen‐tube growth. Substantial evidence of ovule stimulation and enhanced pod retention was recorded in crosses between the European species andL. mutabilis, but viable seeds were not obtained. The indications, from pollen‐tube growth and pod retention in certain crosses, are that genetical isolation between some of the species could be

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01675.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Progress in studies of Cucurbitaceae since 1964 is reviewed, particular attention being paid to the roles of seed‐coat anatomy, palynology and phytochemistry in elucidating the taxonomy of the family; to the use of wild species and land‐races as sources of horticulturally desirable traits for the improvement of crops; to the potentialities of wild species for domestication as new crops for tropical areas, and to the biology of reproduction, sex control and sex expression. The classification of the lady is outlined, illustrated by discussion of the more important members of each tribe, and a revised classification ofCucumisis presen

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01676.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY