Emerald Isle Books Catalogue No. 95 listing trees incidentally quotes his birth as 1857 in Portglenone, Co. Antrim [var. Cookstown], but other sources suggest Dundee as his birthplace on the same date. He was educated in Ireland before setting out on his now famous plant expeditions to China.
I hope that this is the man for whom you were looking. His quiet genius has lead to our understanding of many plants that he discovered and classified. More info on this man of whiskers at
http://www.plantexplorers.com/Explorers/Biographie
s/Henry/index.html