50 MICHIGAN ACADEMY OF SCIENCE. 



152. ARABIS, Lin. 



412. Canadensis, Lin. Sickle-pod. Near Palmer Park. Frequent. 



413. glabra (Lin.) Bernh. Tower Mustard. Unimproved property at 



Detroit. Frequent. 



153. ERYSIMUM, Lin. 



414. cheiranthoides, Lin. Treackle Mustard. Roadsides on Belle Isle. 



Frequent. 



154. ALYSSUM. Lin. 



415. alyssoides (Lin.) Gouan. Sweet alyssum. On the southeast shore 



of Belle Isle where it is quite frequent. 



155. KOXIGA, Adans. 



411). maritima (Lin.) R. Br. Waste place at Detroit. Frequent. 



156. HESPERIS, Lin. , 



417. matronalis, Lin. Dame's Rocket. With the last. Frequent. 



FAMILY 42. CAPPARIDACE-E. Caper Family. 



157. CLEOME, Lin. 



418. spinosa, Lin. Spider-flower. Waste grounds at Detroit. Rare. 



158. POLANISIA. Raf. 



419. graveolens, Raf. Sandy places on Belle Isle. Frequent. 



FAMILY 43. RESEDACE.E. Mignonette Family. 



159. RESEDA. Lin. 



420. alba, Lin. On ballast grounds at Detroit. Rare. 



Order 18. Rosales. 



FAMILY 44. CRASSULACE-E. Orpine Family. 



160. PENTHORUM, Lin. 



421. sedoides, Lin. Ditch Stone-crop. Ditches, etc., Belle Isle. Common. 



FAMILY 45. SAXIFRAGACE.E. Saxifrage Family. 



161. HEUCHERA. Lin. 



422. Americana, Lin. Alum-root. Dry woods on Belle Isle. Rare. 



162. MITELLA. Lin. Mitrewort. 



423. diphylla, Lin. Bishop's Cap. Near Palmer Park. Frequent. 



163. RIBES, Lin. Gooseberry, Currant. 



424. Cynosbati, Lin. Wild Gooseberry, Dogberry. 



425. floridum, L'Her. Wild Black Currant. Both species are common in 



woods on Belle Isle. 



FAMILY 46. HAMAMELIDACE.E. Witch Hazel Family. 



164. HAMAIMELIS. Lin. 



426. Virginiana. Lin. Witch Hazel. Frequent in sparsely wooded places 



at Detroit. 



FAMILY 47. ROSACE.E. Rose Family. 



165. SPIR.^A, Lin. Meadow Sweet. 



427. salicifolia, Lin. Quaker Lady. Moist grounds on Belle Isle. 



428. tomentosa, Lin. Hardback. Near Linden Park. Rare. 



166. PORTERANTHUS, Britt. 



429. stipulatus (Muhl.) Britt. American Ipecac. Belle Isle. Rare. 



