Apium virus Y sea celery ("Apium prostratum"), cilantro ("Coriandrum sativum"), and bishop’s weed ("Ammi majus"). In Germany it has recently been found naturally infecting celeriac or celery root. All are members of the plant family "Apiaceae". Symptoms reported included mosaic, vein clearing or banding, necrotic/chlorotic line patterns and stunting. Some samples of parsley, celery and poison hemlock, that gave positive results in tests, however, were asymptomatic. In host range studies, the virus causes local lesions on "Chenopodium quinoa" and "C. amaraticolor" ("Amaranthaceae"). Apium virus Y "Apium virus Y" (ApVY) is a plant pathogenic virus in the genus "Potyvirus" and the virus family "Potyviridae".
Plant identification standard size of 16 × 11 inches or 41.25 × 28.75 cm. The identified plant ideally includes all parts including roots, flowers and fruits, strobili, etc. One of the largest herbaria in the world is kept at the Royal Botanic Gardens, Kew England and has collected an estimated 7 Million specimens. Plant identification Plant identification is the process of matching a specimen plant to a known taxon. It uses various methods, most commonly dichotomous keys or multi-access keys. Plant identification has evolved over hundreds of years and depends to a large extent on what criteria and whose system is used.