ECOLOGY OF NORTHERN MICHIGAN. 91 



66. Ceanothus americanus L. New Jersey Tea. With the heaths on 

 the Minong Trap promontory, IX. 



Violaceae DC. Violet Family. 



67. Viola spp. Violet. A number of species of violets '\vere observed 

 in the woods and alder thickets, but, as they were not in bloom, they were 

 not identified with certainty. 



Haloragidaceae Kl. and Garcke. Water-milfoil Family. 



68. Myriophyllum sp. An unidentified species was abundant in Wash- 

 ington river near the mouth, II. 



Araliaceae Vent. Ginseng Family. 



69. Aralia nudicaulis L. Wild Sarsaparilla. Generally distributed 

 throughout the forests of the slope, III, VI, and river valleys, II, IV. 



Cornaceae Link. Dogwood Family. 



70. Cornus canadensis L. Dwarf Cornel. Generally distributed through 

 the forests of the slopes, III, VI, and in the forest of the river valleys, II, 

 IV, V. It also occurs with the heaths on the Minong Trap promontory, IX. 



71. Cornus stolonifera Michx. Red-osier Dogwood. Occasional in the 

 tamarack-spruce forests of the river bottoms, II, IV, V. Also about the 

 shore of Lake Desor, VII. 



Pyrolaceae Agardh. Wintergreen Family. 



72. Chimaphila umbellata (L.) Nutt. Pipsissewa. Prince's Pine. In 

 damp woods, III, and VI. 



Monotropaceae Lindl. Indian-pipe Family. 



73. Monotropa uniflora L. Indian-pipe. Occasional in shady situations 

 in the forest, III, VI, and in the tamarack and spruce woods in the river 

 valleys, II, IV and V. 



Ericacae DC. Heath Family. 



74. Ledum groenlandicum OEder. Labrador Tea. In the tamarack- 

 spruce forest, on the flood-plain of Washington river, II, and on the Sphagnum 

 in old pools on the Minong Trap promontory, IX. 



75. Andromeda polifolia L. Wild Rosemary. In the tamarack and spruce 

 woods on the flood-plain of Washington river, II. 



76. Chamaedaphne calyculata (L.) Moench. Dwarf Cassandra. On the 

 Sphagnum growth in old rock pools on the Minong Trap promontory, IX. 



77. Arctostaphylos uva-ursi (L.) Spreng. Red Bearberry. On the thin 

 soil on the outer end of the Minong Trap promontory, IX. With the other 

 heaths, it follows the crevice grasses and sedges. 



Vacciniaceae Lindl. Huckleberry Family. 



78. Vaccinium pennsylvanicum Lain. Dwarf or Low-bush Blueberry. 

 Distribution as the last. 



