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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Canadian wildlife. The flora of Canada is quite diverse, due to the wide range of ecoregions and environmental conditions present in Canada. From the warm, temperate broadleaf forests of southern Ontario to the frigid Arctic plains of Northern Canada, from the wet temperate rainforests of the west coast to the arid deserts, badlands and tundra ...
List of Canadian Heritage Wheat Varieties. List of Canadian plants by genus. List of the plants of Canada. List of the ferns and allies of Canada. List of the conifers of Canada. List of the bryophytes of Canada. List of wildflowers of the Canadian Rocky Mountains.
Convergence insufficiency. Convergence Insufficiency. Other names. Convergence disorder. Specialty. Ophthalmology, optometry. Convergence insufficiency is a sensory and neuromuscular anomaly of the binocular vision system, characterized by a reduced ability of the eyes to turn towards each other, or sustain convergence .
Generally, Lactuca canadensis is a biennial herb in the daisy family growing from a taproot to maximum heights of 50–200 cm (19.5–78.5 in) or more. The leaves are deeply lobed and occasionally toothed. The top of the stem bears an inflorescence with many flower heads, each up to 1 cm (0.5 in) wide when open. The heads have many pale yellow ...
Esotropia is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [1] It is the opposite of exotropia and usually involves more severe axis deviation than esophoria. Esotropia is sometimes erroneously called ...
Calopogon — grass-pinks. Calopogon tuberosus — tuberous grass-pink. Caltha — marsh marigolds. Caltha natans — floating marsh marigold. Caltha palustris — marsh marigold, cowslip, kingcup, cowflock. Calypso — calypsoes. Calypso bulbosa — calypso, fairy-slipper, nymph-of-the-north. Calystegia — bindweeds.
Range in Canada Global rank Notes YK NT NU LB CA; BC AB SK MB ON QC NB PE NS NL; Anacolia menziesii: YK NT NU LB CA Apparently secure IDD BC AB SK MB ON QC NB PE NS NF Bartramia halleriana: YK NT NU LB CA Apparently secure IDD COSEWIC: Threatened BC AB SK MB ON QC NB PE NS NF Bartramia ithyphylla: YK NT NU LB CA Apparently secure IDD BC AB SK ...
Canada, defined politically, is not a category used in the World Geographical Scheme for Recording Plant Distributions. In the WGSRPD, the flora of Canada is divided as follows and these categories should be used instead: Category:Flora of Western Canada. Category:Flora of Eastern Canada. Category:Flora of Subarctic America (Nunavut, Northwest ...
An early system of plant taxonomy developed by Antoine Laurent de Jussieu (1748 – 1836), the de Jussieu System' (1789), is of great importance as a starting point for botanical nomenclature at the rank of family, together with Michel Adanson 's Familles naturelles des plantes (1763). While Adanson introduced the concept of families, Jussieu ...