168 SIXTEENTH REPORT. 



Arabis glabra (L.) Bernh. Tower Mustard. — Occasional in dry woods and 

 thickets. 



Arabis drummondi Grey. Drummond's Rock Cress. — Occasional about 

 Port Franks. 



Arabis hirsuta (L.) Scop. Hairy Rock-Cress. — Noticed near Blackwell 

 Station. Api:)arently rare. 



Arabis laevigata (Muhl.) Poir. Smooth Rock Cress.— Frequent in poor 

 and sandy ground, usually near the Lake Huron shore or along the dry banks 

 of streams. 



Arabis canadensis L. Sickle Pod. — Occasional in woods and thickets. 



Capparidaceae. Caper Family. 



Polanisia graveolens Raf. Clammy Weed. — Reported by Prof. John 

 Macoun as noticed on the lake shore near Point Edward. Rare. 



Sarraceniaceae. Pitcher-plant Family. 



Sarracenia purpurea L. Pitcher-Plant. — Now plentiful in swampy places 

 at Port Franks. Formerly very abundant in and about tamarack swamps. 



Droseraceae. Sundew Family. 



Drosera rotundifolia L. Round-Leaved Sundew. — Frequent in peat-bogs, 

 and growing in Sphagnum of swamps. 



Crassulaceae. Orpine Family. 



Penthorum sedoides L. Ditch Stonecrop. — Very common in wet open 

 places. 



Sedum acre L. Mossy Stonecrop. — Common in dr}^ and sandy ground 

 near towns, villages and in cemeteries. 



Sedum purpureum Tausch. Live-for-ever. — Frequent in poor and sandy 

 ground as an escape from cultivation. Slow to bloom. 



Saxifragaceae. Saxifrage Family. 



Tiarella cordifolia L. False Miterwort. — Common in damp rich woods and 

 thickets. 



Mitella diphylla L. Two-leaved Bishop's Cap. — Very common in rich 

 woods and thickets. 



Mitella nuda L. Stoloniferous Miterwort. — Common in moist woods and 

 thickets. 



Chrysosplenium americanum Schwein. Golden Saxifrage. — Frequent in 

 very wet, usually shady places, and about living springs. 



Parnassia caroliniana Michx. Carolina Grass of Parnassus. — Common in 

 marshy open places. 



Ribes cynosbati L. Prickly Gooseberry. — Common in open woods and 

 thickets. 



Ribes oxyacanthoides L. Smooth Gooseberry. — Frequent in damp places, 

 rich open woods and thickets. 



Ribes floridum L'Her. Wild Black Currant. — Common in damp rich 

 woods and thickets. 



