Showing papers on "Plant morphology published in 1992"

Effects of NO2 on hoop pine can be counteracted by SO2

Abstract: Long intermittent exposures ofAraucaria cunninghamii to SO2 and NO2 produced complex interactions with effects on resource allocation and plant morphology. Exposure to NO2 decreased chlorophyll concentrations but increased stem diameter and shoot fresh weight, in an apparent compensatory response, altering the growth form of the tree. The effects of NO2 were counteracted by the additional presence of SO2, although SO2 alone had little effect.

Reproductive biology of Geranium sessiliflorum III. Population ecology of two populations and three leaf colour morphs

Abstract: Two populations and three leaf colour morphs of Geranium sessiliflorum were compared using data obtained during one growing season in New Zealand. In fixed quadrats germination, size specific survival and reproduction, flowering phenology, fate of flowers, and seedfall were investigated. The two populations differ in plant morphology, population structure, and various life history features. Differences are found between the three morphs with regard to survival of small plants and seed set. Mechanisms for the maintenance of the polymorphism are discussed.

A new species of Cyananthus (Campanulaceae) from Nepal

Abstract: A new species, Cyananthus himalaicus from Gurjakhani, Nepal is described and illustrated, and its relationship with C. cordifolius and C. pedunculatus is discussed.