FARWELL ON THE FLORA OF DETROIT. 43 



SUBCLASS 2. DICOTYLEDONES. 

 SERIES 1. CH0RIPETAL.13. 



Order 8. Salic ales. 



FAMILY 17. SALICACE.E. Willow Family. 



78. POPULUS, Lin. Poplar. 



242. tremuloides, Mx. American Aspen. Linden Park. Frequent. 



243. deltoides, Marsh. Cotton wood. Frequent on Belle Isle. 



79. SALIX. Willow. 



244. amygdaloides, Anders. Belle Isle shores. Common. 



245. lucida, Muhl. On Belle Isle and elsewhere. Rare. 



246. fragilis, Lin. Northeast shores of Belle Isle. Rare, 



247. alba, Lin. var. vitellina (Lin.) Koch. On Belle Isle. Frequent. 



248. Babylonica, Lin. Common on Belle Isle and elsewhere. 



249. purpurea, Lin. South shores of Belle Isle. Rare. 



250. tiuviatilis, Nutt. North shores of Belle Isle. Rare. 



251. Bebbiana, Sarg. At Linden Park. Frequent. 



252. tristis, Ait. At Linden Park. Frequent. 



253. discolor, Muhl. Shores of Belle Isle. Frequent. 



254. var. eriocephala (Mx.) Anders. At Linden Park. Rare. 



255. sericea, Marsh. At Linden Park. Frequent. 



256. petiolaris, J. E. Sm. On Belle Isle. Rare. 



257. Candida, Fluegge. At old race-course. Frequent. 



258. cordata, Muhl. At Linden Park. Rare. 



259. var. angustata (Ph.) Anders. On Belle Isle. Frequent. 



Order 9. Juglandales. 



FAMILY 18. JUGLANDACE^. Walnut Family. 



80. HICORIA, Raf. Hickory. 



260. minima (Marsh.) Britt. Bitter-nut. 



261. ovata (Mill.) Britton. Shell-bark. 



262. var. borealis (Ashe.) 



E. borealis Ashe. Notes on Hickories, 1896. 



263. laciniosa (Mx.) Sarg. Shag-bark. 



264. alba (Lin.) Britt. Mocker-nut. 



265. glabra (Mill.) Britt. Pig-nut. 



266. var. odorata (Marsh.) Sarg. . 



All these hickories are more or less common on Belle Isle. The seeds 

 of all except H. minima and of H. glabra are edible. The fruit of 

 H. borealis has a thick husk completely separating into four valves, 

 a thin shell, and a sweet seed; the bark is shaggy; it therefore 

 is a variety of H. ovata. It differs from tlie species in having a 

 smaller fruit (not over one-half so large) and smaller, narrower 

 leaflets, foliage resiniferous shining and drying black when young. 



Order 10. Fagales. 



FAMILY 19. BETULACE.E. Birch Family. 



81. BETULA, Lin. 



267. papyrifera, Marsh. Canoe Birch. Near Palmer Park. Common. 



