THE BOTANISTS OF PHILADEU'HIA. 91 



Of Isaac Hartman, Esq., by whom he had two sons. For 

 some time before his death liis bodily streiigtli began to 

 fail, which induced him, in the autumn of 1815, to relinquish 

 his practice, to the great regret of the families whom he ha.l 

 attended. A genus, Kuhnia, of compositou.s plants was 

 named by Linnreus in honor of Kuhn. 



After a confinement to the house of about three weeks, 

 he expired .July 5, 1817, aged seventy-five vears, without 

 pam, and fully sensible of the approaching dissolution. 



DAVID LANDRETH. 



David Landreth * (1752-1836) was born at Brunswick 

 on the Tweed, the son of a Northumberland farmer. 

 Having learned the trade of nurseryman, he emigrated to 

 Canada in 1781, removing afterward to Philadelphia, 

 where in 1786, in partnership with his brother Cuthbert, he 

 started the nursery and seed business, still carried on by his 

 descendants. In 1804 or 1805 David Landreth ol.tained 

 from the Lewis and Clark expedition seeds of the Osage 

 Orange, from which Avas grown a number of trees. One of 

 these was planted in front of the old Landreth mansion on 

 the ground now occupied by the Landreth Public School, 

 22nd and Federal Streets. It was a pistillate plant, and never 

 fruited until fertilized by pollen, brought from a tree grow- 

 ing in M'Mahon's garden. David Landreth, and his succes- 

 sors of the same name are not botanists in the strict sense of 

 the term, although their knowledge of plant life is verv 

 intimate and precise. Bloomsdale form is an example of 

 how a seed ferm should be maintained. Situated .m tlie 

 Delaware River, near Bristol, it commands the tra<le of New 

 York and Philadelphia. 



• 1S.J5. SARGENT-»ii-a„/ivro,.,A A,nerica, VII. S7. See lilograpl.y otR. Ilui.s., 



