Zobrazeno 1 - 10
of 33
pro vyhledávání: '"P. B. Cavers"'
Publikováno v:
Canadian Journal of Plant Science. 89:191-206
The cruciferous weed Hesperis matronalis, dame's rocket (Brassicaceae), is an introduced Eurasian garden plant that began to escape shortly after its introduction to North America in the 19th century. It has gradually become naturalized across Canada
Publikováno v:
Canadian Journal of Plant Science. 83:217-237
Cannabis sativa has been cultivated for millennia in Eurasia and for centuries in North America, as a source of a textile fibre, oilseed, and intoxicating drugs such as marijuana. Considerable literature is available on the agricultural and biologica
Publikováno v:
Canadian Journal of Botany. 67:2833-2840
The dimension of soil augers needed to sample a seed bank of Chenopodium spp. (lamb's-quarters) was determined by randomly sampling a 1.35-ha area within a cornfield in Oxford County, Ontario. Sampling units of three different auger sizes (1.9, 2.7,
Publikováno v:
Canadian Journal of Plant Science. 60:1269-1282
Narrow-leaved plantain (Plantago lanceolata L.) is particularly abundant in southern areas of British Columbia, Ontario and Quebec, and the coastline of Prince Edward Island and Nova Scotia. It is a serious weed of lawns, dry grasslands and roadsides
Autor:
P. B. Cavers
Publikováno v:
Canadian Journal of Botany. 52:575-583
Seeds from six individual plants of Rumex crispus L. were stored under four contrasting conditions of temperature and relative humidity for 6 mo to 5 years. After storage, all viable seeds germinated under conditions of diurnally alternating light an
Autor:
L. Hume, P. B. Cavers
Publikováno v:
Canadian Journal of Botany. 61:1276-1282
Genetically based differences among widespread populations of Rumex crispus L. from 10 localities in eastern North America and 1 in Bangor, Wales, were examined. Plants from all populations allocated the same proportions of resources to reproductive
Autor:
R. J. Staniforth, P. B. Cavers
Publikováno v:
Canadian Journal of Botany. 54:2587-2596
The annual smartweeds Polygonum lapathifolium L., P. pensylvanicum L., and P. persicaria L. grow on alluvial river bars during the summer and autumn when their substrate is free of flood waters and physical disturbance. They are dependent upon disper
Autor:
R. A. Turkington, P. B. Cavers
Publikováno v:
Canadian Journal of Botany. 56:413-416
The partitioning of dry matter into component plant parts has been traced for four legumes. The four species were chosen to represent different positions along the r-K continuum. Three of the species, Medicago lupulina, M. sativa, and Trifolium prate
Autor:
S. S. Sidhu, P. B. Cavers
Publikováno v:
Botanical Gazette. 138:174-182
Seeds of Medicago lupulina L. (black medick) possess a nondormant phase during their development. The duration of this phase depends on the environment under which the seeds mature and the genotype of the parent plant. Both seeds attached to the pare