90 MICHIGAN SURVEY, 1905. 



49. Spiraea salicifolia L. Willow-leaved or American Meadow-sweet. 

 This shrub was found along Washington river, II, between the alder and 

 sedge zones, where the latter was well developed. 



50. Rubus parviflorus Nutt. White-flowering Raspberry. In sunny- 

 spots in the woods. III, VI, also along the shore of Washington Harbor, X. 



51. Ruhus ardicus L. Arctic Raspberry. In the bogs, IV, and V. Appar- 

 ently not common. 



52. Rubus strigosus Michx. Wild Red Raspberry. In burnings and 

 clearings, Siskowit Bay, VIII, and at Washington Harbor, I. 



53. Potentilla argentea L. Silvery or Hoary Cinquefoil. On the shingle 

 beach at Siskowit Bay, VIII. 



54. Sibbaldiopsis trideniata (Soland.) Rydb. Three-toothed Cinquefoil. 

 On the shingle beach and in the rock crevices at Siskowit Bay, VIII, and in 

 the rock crevices on the Minong Trap promontory, IX. 



55. Dasiphora fruticosa (L.) Rydb. Shrubby Cinquefoil. In the rock 

 crevices on the Minong Trap promontory, IX. 



Pomaceae L. Apple Family. 



56. Sorbus americana Marsh. American Mountain Ash. In rocky ex- 

 posed situations, especially about the shores of the island and on the islands 

 in Lake Desor, VII. 



57. Amelanchier canadensis (L.) Medic. June-berry. On the shore at 

 Siskowit Bay, VIII, and Grace Harbor; also in burnings and clearings, and 

 on the small islands in Lake Desor, VII. 



Drupaceae DC. Plum Family. 



58. Primus pumila L. Sand Cherry. In the clearing at Siskowit Bay, 

 VIII, and on the rocky bluffs along the northwest shore of the island. 



59. Prunus pennsylvanica L. f. Wild Red Cherry. On the islands in 

 Lake Desor, VII. 



Papilionaceae L. Pea Family. 



60. Lathyrus maritimus (L.) Bigel. Beach Pea. On shingle beaches 

 in the bays on the southwest end of the island (Macduff). 



6L Lathyrus ochroleucus Hook. Cream-colored Vetchling. As the last. 



62. Empetrum nigrum L. Black Cranberry. With the heaths on thin 

 soil on the Minong Trap promontory, IX. 



Aceraceae St. Hil. Maple Family. 



63. Acer saccharum Marsh. Sugar or Rock Maple. Only found on the 

 top of the Greenstone Range, III, where it predominates in a narrow strip 

 along the crest of the ridge. This is the only hardwood forest on the south 

 end of the island, and it is reported by Mr. Hollinger to extend the length 

 of the island. 



64. Acer spicatum Lam. Mountain Maple. This shrub is generally 

 distributed as undergrowth in the forest. III, VI, with Taxus canadensis 

 and Corylus rostrata. Although more abundant than the latter, it does not 

 form as large a proportion of the undergrowth as the former. 



Rhamnaceae Dumort. Buckthorn Family. 



65. Rhamnus alnifolia L'Her. In the alder thickets, II, IV. 



