ECOLOGY OF ISLE ROYALE. 243 



Polygalaceae — Milkwort Family. 



277. Polygala paudfolia Willd. Fringed Polygala. Fairly common in 

 rich, moist woods. I, 3; III, 4. 



Empetraceae — Crowberry Family. 



278. Empetrum nigrum L. Crowberry, Heath-berry. On exposed, 

 nearly bare rocks at Scovill Point. IV, 1. 



Anacardiaeeae — Suma,c Family. 



279. Rhus hirta (L) Sudw. Staghorn Sumac. Sparingly distributed 

 on higher parts of Greenstone. II, 3. 



Hypericaceae — St. John's-wort Family. 



280. Triadenum virginicum (L) Eaf. Marsh St. John's-wort. Bog 

 margin of Sumner Lake (III, 5) ; also margin of Forbes Lake (II, 5). 

 Common. 



Violaceae — "\"iolet Family. 



281. Viola rotundifoUa Michx. Eound-leaved Violet. Fairly com- 

 mon in rich, moist woods, especially near I, 6. 



282. Viola Idbradorica Schrank. American Dog Violet, Few Speci- 

 mens in low moist ground near shore at Siskowit Bay cabin, V, 1. 



283. Viola arenaria DC. Sand Violet. Rocky shore near Siskowit 

 cabin V, 1. 



Onagraceae — Evening Primrose Family. 



284. Ghamaenerion angustifolium (L) Scop. Fireweed. Very abund- 

 ant everywhere in burnings and clearings. 



285. Epiloikim Uneare Muhl. Narrow-leaved Willow-Herb. Bog mar- 

 gin Sumner Lake, III, 5. 



286. EpiloMum adenoca/ukm Haussk. Northern Bog Willow-Herb. 

 Wet soil near shore of Siskowit cabin, V, 1. 



287. Circaea Alpina, L. Smaller Enchanter's Nightshade. Cool 

 moist woods at head of Rock Harbor. Not common. 



Pyrolaeeae — Wintergreen Family. 



288. Pyrola chlorantM. Sw. Greenish-flowered Wintergreen. Rich, 

 moist woods. 



289. Pyrola asarifolia Michx. Liver-leaf Pyrola. Most common of the 

 island pyrolas. Woods. 



290. Pyrola secunda L. One-sided Wintergreen. Rich, moist woods. 

 Not common. 



291. Pyrola minor L. Lesser Pyrola. Woods.. Scarce. 



292. Moneses uniflora (L) A. Gray. One-flowered Wintergreen. 

 Rather widely distributed in rich, moist woods, although nowhere abund- 

 ant. I, 3, 4; III, 4; IV, 4. 



293. ChimapMla umhellata (L) Nutt. Pipsissewa. Dry woods and 

 exposed sunny places, as the pine ridge near Sumner Lake. 



