have gained the Royal Horticultural Society's Award of Garden Merit. Picea glauca ‘Echiniformis’ Picea glauca var. albertiana ‘Alberta Globe’ Picea glauca var. albertiana ‘Conica’ 'Conica' is a dwarf conifer with very slender leaves, like those normally found only on one-year-old seedlings, and very slow growth, typically only per year. Older specimens commonly 'revert', developing normal adult foliage and starting to grow much faster; this 'reverted' growth must be pruned if the plant is to be kept dwarf. Genome P. glauca has three different genomes; a nuclear genome, a mitochondrial genome, and a plastid (i.e. chloroplast) genome. The large (20 Gbp) nuclear genome of P. glauca (genotype WS77111) was published in 2015, and the organellar (plastid and mitochondrial) genomes (genotype PG29) were published in SD Jackman et al. 2015. The plastid genome of P. glauca (genotype WS77111) has also been published. References External links Least concern plants Ornamental trees glauca Provincial symbols of Manitoba Taiga and boreal forests Trees of humid continental climate Trees of continental subarctic climate Trees of Alberta Trees of British Columbia Trees of Canada Trees of Manitoba Trees of Ontario Trees of Saskatchewan Trees of Western Canada Trees of Subarctic America Trees of Eastern Canada Trees of Alaska Trees of the Northeastern United States Trees of the Northwestern United States Trees of the North-Central United States Trees of the United States Trees of the Great Lakes region (North America) Trees of North America Symbols of South Dakota