摘要:

RAMIREZ, N.&BRITO, Y., 1992. Pollination biology in a palm swamp community in theVenezuelan central plains. In a palm swamp community that differs strongly from the surrounding savanna in the Venezuelan central plains, the pollination and floral biology of 33 plant species were studied during three years: 1983, 1984 and 1989. The most frequent flower colours were white, pink, yellow, and in a lesser proportion green, brown, purple and red. Floral symmetry was found in roughly equal proportion for actinomorphic and zygomorphic flowers. Most flowers were short‐lived (6–12 hours); in monoecious species the female flowers were longer‐lived than the male flowers. The most frequent rewards were pollen and nectar (36.4%) and pollen (30.3%). At the community level, bee‐ and wasp‐pollination prevailed in 57.1% of plant species studies, followed by wind‐ (14.3%), fly‐ (11.4%), butterfly‐ (8.6%), bird‐ (5.7%) and beetle‐pollination (2.9%). Between one and five plant species were simultaneously visited by the visitor species. The vast majority of the pollinating species displayed a high degree of load specificity: 26 pollinator species (65.0%) carried pollen from only one plant species, eight (20.0%,) carried pollen from two plant species, three (7.5%) carried pollen from three plant species and one (2.5%) carried pollen from five plant species. Visitor specificity and pollen transportation were similar amongst the visiting agents. Plant pollination‐system specificity and pollen transportation were statistically significant among plant species with different pollinator types, but plant pollination system and pollen transportation were not different among floral symmetry, floral longevity, reward type, plant sexuality, breeding system and plant life form. The visitor species/plant species ratio was 1.6, and the pollinator species/ plant species ratio was 1.3. Among different guilds, birds, Coleoptera and Lepidoptera showed the highest pollinator species/plant species ratio, and wind pollination

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00294.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

CHINNAPPA, C. C, GIFFORD, D. J.&RAMAMORRTHY, J., 1992. Studies on theStellaria longipescomplex (Caryophyllaceae): relationships among the species based on seed protein profiles. The protein profiles of nine genera of the family Caryophyllaceae show distinct patterns. Within the genusStellaria, six species were studied. The four North American species show more or less similar profiles, while the two European species have quite different patterns. There are some indications to suggest that the polyploid species, 5.longipes, is closely related to diploidS. longifoliaandS. porsildii.The seed protein profiles of these species support the view that 5.longipesmight have originated from hybridization between the two diploid species.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00295.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

MIDDLETON, D. J., 1992. A chemotaxonomic survey of flavonoids and simple phenols in the leaves ofGaultheriaL. and related genera (Ericaceae). Species ofGaultheriaandLeucothoehave been screened for a number of flavonoids and simple phenols. Many of these, particularly the American species, are surveyed for the first time. Extensive sampling has also been carried out within some of the species ofGaultheria.Together with previously published data the results are discussed in relation to the position ofGaultheriain the Ericaceae and the infrageneric classification ofGaultheria.The infraspecific variation is commented on.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00296.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

MIDDLETON, D. J., 1992. Infrageneric combinations inGaultheriaL. (Ericaceae). SectionsPseudogaultheriaandBrossaeaand seriesLeucothoidesandGymnobotrys, previously invalidly published new combinations inGaultheria, have been validated.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00297.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

ABEBE, D., 1992. Systematic studies in the genusPimpinella(Umbelliferae) from tropical Africa. Twenty species of the genus Pimpinella, mostly from tropical Africa, were studied by a multidisciplinary approach. The overall results showed that morphological and anatomical characters of the fruit were crucial in determining the generic and specific status.Pimpinella simense sensuBenth.,Schimperella verrucosa sensuWolff are recognized asSium simense.Four recently described species are included.Pimpinella englerianais reduced to varietal status in the new combination,P. ledermanniivar.engleriana.The general evolutionary trends and the probable migration route of the genus to tropical Africa are discussed. A taxonomic treatment grouping all the species into two sections is presented along with keys and descriptions for each taxon.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00298.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

RAHMAN, M. A.&WILCOCK, C. C, 1992. A new species ofPeriploca(Periplocaceae) from Bangladesh. A new species ofPeriplocais described from Bangladesh. This is the only representative of the genus occurring in the flora of Bangladesh. It resemblesP. graecabut may be distinguished by having shorter peduncles, glabrous calyx lobes, hairy coronal scales, broader and horizontally spreading follicles.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00299.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

CARRETERO, J. L., 1992. A new species ofAnthemisL. (Asteraceae) from Central Spain. A new species ofAnthemisis described from the eastern Toledo Mountains. The morphological relationships to other taxa, as well as the chorology and ecology of the new species are presented.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00300.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

CUTLER, D. F., 1992. Vegetative anatomy of Ophiopogoneae (Convallariaceae). The vegetative anatomy (particularly leaf) of species ofOphiopogon, LiriopeandPeliosanthesis described from observations with light and scanning electron microscopy. A syndrome of leaf characters is present, including epidermal features; hypodermal fibre‐like cells; raphides and unusual short, square‐ended prismatic crystals arranged in plates; phloem with abundant sclerenchyma and frequent individual strands each composed of a sieve tube element and its associated companion cell; and vascular bundles with unusual orientation, which shows the very close inter‐relationship betweenOphiopogonandLiriope. Peliosanthesshares the phloem type, hypodermal fibre‐like cells and raphides, but is less similar in epidermal characters and vascular bundle orientation. The significance of the unusual phloem type is considered in relation to similar types in other members of the Lili

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00301.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Taxonomy of Economic Seaweeds with Reference to some Pacific and Western Atlantic Species, Volume 3, edited by Isabella A. AbbottConservation of Medicinal Plants edited by Olayiwola Akerele, Vernon Heywood&Hugh SyngeIntroduction to Floriculture, 2nd Ed., edited by R. A. LarsonPlant Membranes: A Biophysical Approach to Structure, Development and Senescence by Ya'acov Y. LeshemThe Ecology o/Fynbos, edited by R. CowlingA Dictionary of Plant Pathology, by P. Holliday7th International Exhibition of Botanical Art and Illustration 13 April to 31 July 1992. Catalogue by James J. White&Autumn M. FarolePlant Growth: interactions with nutrition and environment, edited by J. R. Porter&D. W. LawlorResponse of Plants to Multiple Stresses, edited by H. A. Mooney, W. E. Winner&E. J. PellPollen and Spores: Patterns of Diversification, edited by S. Blackmore and S. H. BarnesInternational Checklist for Hyacinths and Miscellaneous Bulbs, edited by J. van ScheepenAtlas Florae Europaeae, 9 (Paeoniaceae to Capparaceae), edited by Jaakko Jalas&Juha SuominenNitrogen fixation, edited by M. Polsinelli, R. Materassi&M. VincenziniCrucifers of Great Britain and Ireland, by T.C.G. RichMicropropagation: Technology and Application, edited by P. C. Debergh&R. H. ZimmermanPhytochemical Induction by Herbivores, edited by D. W. Tallamy&M. J. RauppPattern Formation in Plant Tissues, by T. SachsIntroduction to the Principles of Plant Taxonomy, 2nd ed, by V. V. Sivarajan (edited by N. K. B. Robson)Signal Perception and Transduction in Higher Plants, edited by R. Ranjeva&A. M. BoudetPlant Growth Substances 1988, edited by R. P. Pharis&S. B. RoodGibberellins, edited by N. Takahashi, B.O. Phinney&J. MacMillan

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00302.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY