178 SIXTEENTH REPORT. 



Ceanothus ovatus Desf. Smaller Red-root. — Common in many places on 

 shaded sand ridges near Lake Huron shore. 



Vitaceae. Vine Family. 



Psedera vitacea (Kneer.) Greene. American Woodbine. — Frequent in 

 rich oi:>en woods, thickets, and along streams. Often cultivated. 



Vitis bicolor Le Conte. Summer Grape. — Frequent in woods and thickets. 



Vitis vulpina L. Frost Grape. River-bank Grape. — Common along 

 streams. Often abundant in sand along Lake Huron shore. A good sand- 

 binder. 



TiUiaceae. Linden Family. 



Tilia americana L. Basswood. — Common in rich ground with other 

 trees. 



Malvaceae. Mallow Family. 



Abutilon theophrasti Medic. Velvet Leaf. Indian Mallow. — Occasional 

 on roadsides and in waste places. Often a garden and field weed. 



Malva rotundifolia L. Common Mallow. — Common in waste places and 

 cultivated grounds. 



Malva sylvestris L. High Mallow. — Occasional^ escaping from cultiva- 

 tion to roadsides and waste places. Noticed in particular on Walpole Island. 



Malva moschata L. Musk Mallow. — Occasional on roadsides and in old 

 fields. Well established as an escape. 



Hibiscus moscheutos L. Swamp Rose Mallow. — Noticed in marshy 

 ground on the south shore of Lake St. Clair. It may yet be found on the 

 delta islands of St. Clair River. I am informed this is the plant lately 

 named by Dr. E. L. Greene as H. opulifolius, the type plant coming from the 

 big marsh at Point Pelee on Lake Erie, Essex Co., Ont., w^here it was for- 

 merly abundant. 



Hibiscus trionum L. Flower-of-an-hour — Occasional as a weed in gardens 

 and fields near Forest. Newton Tripp. 



Hypericaceae. St. John's-w^ort Family. 



Hypericum ascyron L. Great St. John's-wort. — Frequent in damp ground 

 and along banks of streams. Noticed in particular along the Aux Sables 

 river. 



Hypericum perforatum L. Common St. John's-wort. — Frequent in poor 

 and sandy ground on roadsides and in fields. Often a bad field weed. 



Hypericum punctatum Lam. Spotted St. John's wort. — Frequent in damp 

 shaded places. 



Hypericum prolificum L. Shrubby St. John's-wort. — Frequent in open 

 woods and thickets. 



Hypericum kalmianum L. Kalm's St. John's-wort. — Abundant in damp 

 sand along the Lake Huron shore, especially at and near Port Franks. 



Hypericum mutilum L. Dwarf St. John's-w^ort. — Common in low damp 

 ground. 



Hypericum majus (Gray) Britton. Larger Canadian St. John's-wort. — 

 Occasional in damj) grassy ground. 



Hypericum canadense L. Canadian St. John's-wort. — Occasional in damp 

 marshy ground. 



Hypericum virginicum L, Marsh St. John's-wort. — Common in swamps 

 and marshy ground. 



