this new variety of chrysanthemum is of the botanical classification chrysanthemum morifolium l . the observations and measurements were gathered from plants grown in april / may in a greenhouse in rijsenhout holland in a photo - periodic controlled crop under conditions generally used in commercial practice . the greenhouse temperatures during this crop were at day - time between 18 ° c . and 25 ° c . and at night 20 ° c . after a long day period of 14 days the photo - periodic response time in this crop was 47 days . after the long day period to flowering growth retardants were applied 3 times in an average dose of 2 . 5 gram / liter water . no tests were done on disease or insect resistance or susceptibility . this new variety produces medium sized blooms with white ray - florets and yellow - green disc - florets blooming on the plant for 4 weeks . this new variety of chrysanthemum has been found to retain its distinctive characteristics throughout successive propagations however the phenotype may vary significantly with variations in environment such as light intensity and temperature . to show the phenotype as described ‘ redock white ’ can be planted without assimilation lightning ( high pressure sodium lamps ) between week 1 and week 52 under greenhouse conditions in holland . with assimilation light ( minimum level 2500 lux ) it can be planted year round under greenhouse conditions in holland . the difference between ‘ redock ’ and its sport ‘ redock white ’ is flower color . from the cultivars known to inventor the most similar existing cultivars in comparison to ‘ redock white ’ are the original ‘ redock ’ and its several sports and ‘ white reagan ’ ( u . s . plant pat . no . 8 , 784 ). when ‘ redock white ’ is being compared with ‘ redock ’, the following differences and similarities are noticed : the difference of ‘ redock white ’, and ‘ redock ’ is the ( 1 ) ray - floret color . the color of ‘ redock white ’ is white , that of ‘ redock ’ is pink . all other characteristics of members of the ‘ redock ’ family are similar . while when ‘ redock white ’ is being compared with ‘ reagan white ’, the following differences and similarities are noticed . ( 1 ) ray - floret color . both ‘ redock white ’ and ‘ white reagan ’ have white florets . ( 2 ) height of bloom . the bloom height of ‘ redock white ’ is high , while that of ‘ white reagan ’ is low . ( 3 ) cross - section of ray - florets . this is strongly concave for ‘ redock white ’, while it is flat for ‘ white reagan ’. ( 4 ) vigour . the plants of ‘ redock white ’ are more vigorous than those of ‘ white reagan ’. ( 5 ) plant height . the plants of ‘ redock white ’ are higher than ‘ white reagan ’. the following is a description of the plant and characteristics that distinguish ‘ redock white ’ as a new and distinct variety . the color designations are taken from the plant itself . accordingly , any discrepancies between the color designations and the colors depicted in the photographs are due to photographic tolerances . the color chart used in this description is : the royal horticultural society colour chart , edition 1995 .
a chrysanthemum plant named ‘ redock white ’ characterized by its medium sized single type blooms with white ray - florets and yellow - green disc florets .