MICHIGAN ACADEMY OF SCIENCE. 121 



262. Rumex Acetosella L. Sheep Sorrel. Clearings. 



263. Polygonum aviculare L. Knotweed. Clearings. 



264. Polygonum Douglasii Greene. Rock shore crevices, heath mat, and 

 bare burned ridges. 



265. Polygonum viviparum L. Alpine Buckwheat. Protected rock shore 

 crevices and margins of rock pools. 



266. Polygonum tomentosum Schrank. Sand beaches. 



267. Polygonum cil node Michx. Recent burn: Smithwick Island: Gull 

 Islands. 



Chenopodiaceae. Goosefoot Family. 



268. Chenopodium capitatum (L.) Asch. Strawberry Elite. 



269. Chenopodium album L. Lamb's Quarters. Clearings. 



Caryophyllaceae. Pink Family. 



270. Sagina nodosa (L.) Fenzl. Pearlwort. Rock shore crevices. 



271. Stellaria borealis Bigel. Climax forest: on cliffs and boulders and on 

 the ground in wet places. 



• *272. Stellaria longifolia Muhl. Long-leaved Stitchwort. Hoh. 



273. Cerastium vulgatum L. Mouse-ear Chickweed. Clearings. 



274. Silene antirrhina L. Sleepy Catchfly. Rock shore crevices and bare 

 burned ridges. 



275. Silene noctiflora L. Night-flowering Catchfly. Clearings. 



CeratophyUaceae. Hornwort Family. 



276. Ceratophyllum demersum L. Hornwort. Delta streams. 



Nymphaeaceae. Water Lily Family. 



277. Nymphaea advena Ait. Yellow Pond Lily. Common aquatic in bog 

 lakes, sheltered bays, and delta streams. 



278. Castalia odorata (Ait.) Woodville and Wood. White Water I^ily. 

 Bog lakes and delta streams. 



279. Castalia tetragona (Georgi.) Lawson. Small Northern Water Lily. 

 Delta streams: Chippewa Harbor; Duncan Bay. 



Ranunadaceae. Buttercup Family. 



280. Ranunculus aquatilis L. var. capillaceous DC. White Water Crow- 

 foot. Delta streams and sheltered bays. 



28L Ranunculus Flammula L. var. reptans (L.) Mey. Creeping Spear- 

 wort. Muddy shores. 



282. Ranunculus rhomboideus Goldie. Dwarf Buttercup. Heath mat 

 and bare burned ridges. 



283. Ranunculus abortivus L. Small-flowered Buttercup. Depression in 

 climax forest. 



284. Ranunculus Macounii Britton. Macoun's Buttercup. Sand beaches. 



285. Ranunculus acris L. Tall Buttercup. Clearings. 



286. Thalictrum dasycarpum Fisch. and Lall. Tall Meadow Rue. Grass 

 Zone, Delta Swani)) Succession. 



287. Hepatica triloba Chaix. Very old burn west of Sumner Lake. 



288. Anemone multifida Poir. Northern Anemone. Rock shore crevices: 

 Mott Islantl. 



