42 
SILVA OF NORTH AMERICA. 
ROSACEZ. 
Bay in Cecil County, Maryland. It grows also in the meadows of Tohickon Creek at Quakerstown, 
Pennsylvania, and on Tenicum Island, at Haddington, and at Gray’s Ferry, Philadelphia. 
Yorkshire in England, had settled in 1680. William M. Canby 
was educated principally at Westhouse, the Friends’ School near 
Chansford in Chester County, Pennsylvania, and by private tutors. 
He was brought up on a farm, and when he was twenty years old 
he began to manage a farm for himself. In 1866, fifteen years 
later, family affairs carried him to Wilmington. Since that time 
he has been principally occupied in various business affairs there, 
having been receiver and afterwards president of the Delaware 
Western Railroad, director in the Union National Bank, and for 
more than twenty years president of the Wilmington Saving Fund 
Society. He acquired a taste for botany early in life from rela- 
tives and afterward in school, and since 1858, when he visited 
Florida for the first time in search of health and began to gather 
plants, he has been an active and assiduous collector in many 
parts of the United States during long and frequent journeys, and 
his specimens, which have been distributed with a lavish hand, 
are found in all the large herbaria of the world. His own herba- 
rium of about 30,000 species, the harvest of many years of work in 
the field, supplemented by liberal purchases and by exchanges, 
having outgrown the space at its disposal, is now in possession of 
the College of Pharmacy of New York ; and since 1893 Mr. Canby 
has been engaged in forming an herbarium for the Natural History 
Society of Delaware, which now contains about 13,000 species. 
Canbya, a genus of delicate and interesting annual plants of the 
Poppy family, natives of the deserts of the west, dedicated to him 
by his friend Asa Gray, will recall to botanists the name of Canby 
and his important and unselfish labors in increasing the knowledge 
of the American flora after the memory of his kindness, geniality, 
and helpfulness has passed with the generations of his friends and 
associates. 
EXPLANATION OF THE PLATE. 
Pirate DCXXXVIII. Cratzeus Cansyi. 
Do fF WD & 
. A flowering branch, natural size. 
. Vertical section of a flower, enlarged. 
. A fruiting branch, natural size. 
. Vertical section of a fruit, natural size. 
. Cross section of a fruit showing the nutlets, natural size. 
. A nutlet, side view, enlarged. 
