1. Senescent and rejuvenescent change in leaf form is a prime factor in producing variations in Taraxacum vulgare and T. laevigatum. 2. Senescence produces a steadily increasing degree of dissection, ...
Two new species are described, which were collected in Lapland in 1984 and 1990 and later cultivated in Denmark and Finland. One of them, Taraxacum harpagoides Sonck et H. Øllg. spec. nova, belongs to ...
Most angiosperms reproduce sexually through seeds, but in more than 140 genera at least some taxa can produce seeds parthenogenetically (Carman, 1998). These apomicts produce clonal offspring that are ...
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