MICHIGAN ACADEMY OF SCIENCE. 163 



Cerastium arvense L. Field Chickweed. — Occasional as a weed about 

 Forest. Newton Tripp. 



Cerastium arvense oblongifolium (Torr.) Hollick and Britton. Field 

 Chickweed. — Occasional. Very abundant in dry ground at the north end 

 of Walpole Island. Not noticed elsewhere in county. 



Cerastium vulgatum L. Common Mouse-ear Chickweed. — -Very common 

 as a weed in lawns, gardens, fields and waste places. 



Cerastium semidecandrum L. Small Mouse-ear Chickweed. — Abundant 

 in sand at Point Edward. 



Cerastitrai nutans Raf. Nodding Chickweed. — Frequent in sandy or 

 moist rich ground. Newton Tripp. 



Agrostemma githago L. Cockle. Corn Cockle. — Frequent as a weed in 

 grain fields. 



Lychnis coronaria (L.) Desr. Mullen Pink. — Occasional in poor and sandy 

 ground. Noticed at Port Franks and Uttoxeter. F. M. McCordick. 



Lychnis alba Mill. White Campion. — Becoming common in dry and 

 sandy ground on roadsides, in fields and waste places. 



Silene antirrhina L. Sleepy Catchfly. — Common in dry and sandy ground 

 and in fields and waste places. 



Silene armeria L. Sweet William Catchfly. — Occasionally escaping to 

 roadsides and persisting. 



Silene noctiflora L. Night-flowering Catchfly. — Frequent in cultivated 

 grounds and waste places. 



Silene virginica L. Fire Pink. Open woods near Port Franks. Ap- 

 parently infrequent. 



Silene latifolia (Mill.) Britten and Rendle. Bladder Campion. — In cities, 

 villages and towns and along railways. Frequent. 



Saponaria officinalis L. Soapwort. Bouncing Bet. — Becoming very com- 

 mon in dr}' and sandy ground along railways and near the Lake Huron 

 shore. 



Saponaria vaccaria L. Cow-herb. — Occasional along railways and in the 

 streets of towns and villages. 



Gypsophila paniculata L. Tall Gypsophyll. — Occasional as a weed about 

 Forest. N. Tripp. 



Dianthus chinensis L. China Pink. — Inclined to persist in sandy gromid 

 at Point Edward. 



Portulacaceae. Purslane Family. 



Claytonia virginica L. Spring Beauty. — Common in rich open woods and 

 thickets. 



Portulaca oleracea L. Common Purslane. — Very common as a weed in 

 cultivated and waste grounds. 



Ceratophyllaceae. Hornwort Family. 



Ceratophyllum demersum L. Hornwort. — Frequent in slow streams and in 

 ponds. 



Nyviphaeaceae. Water Lily Family. 



Nymphaea advena Ait. Yellow Water Lily. Cow Lily. — Very common 

 in still or stagnant water. 



Castalia tuberosa (Paine) Greene. White Water Lily. — Frequent in ponds, 



