MICHIGAN ACADEMY OF SCIENCE. 179 



Cistaceae. Rockrose Family. 



Helianthemum eanadense L. (?) Michx. Frostweed. — Common on dry and 

 sandy ground, especially near the Lake Huron shore. 



Helianthemum majus BSP. Hoary Frostweed.— Frequent in poor and 

 sandy ground. 



Lechea villosa Ell. Large Pinweed. — Frequent in dry and sandy ground. 



Lechea intermedia Leggett. Large-podded Pinweed. — Occasional in dry 

 and sandy ground, especially near the Lake Huron shore. 



Violaceae. Violet Family. 



Hybanthus concolor (Forster) Spreng. Green Violet. — Along Aux Sables 

 River. Alnmdant in one place. Newton Tripp. 



Viola pedata lineariloba DC. Bird-foot Violet. — Abundant in several 

 places on shaded sand ridges near Lake Huron shore. Newton Tripp. A 

 ver}^ beautiful violet. 



Viola cucuUata Ait. Marsh Blue Violet. — Common in damp and marshy 

 places. A beautiful violet. 



Viola nephrophylla Greene. Small Mottled Blue Violet. — Noticed at Rock 

 Glen in 1906 by Dodge and near Sarnia by N. Tripp. 



Viola afiinis LeConte. LeConte's Violet. Wet ground on borders of 

 woods. Frecjuent. 



Viola palmata L. Early Blue Violet. — In damp woods on the delta islands 

 of St. Clair River. Fast disappearing. 



Viola sororia Willd. Woolly Blue Violet. — Common in meadows and 

 woods. 



Viola fimbriatula Sm. Ovate-leaved Violet. — Occasional in dry and sandy 

 ground, especially on and near the shaded and fixed sand dunes along Lake 

 Huron shore. 



Viola sagittata Ait. Arrow-leaved Violet. — Moist prairie-like ground on 

 the delta islands of St. Clair River. Abundant in spots. 



Viola pallens (Banks) Brainard. Northern White Violet. — Frequent in 

 wet springy places. A small white violet appearing very early in the spring. 



Viola blanda Willd. Sweet White Violet. — ^Moist rich woods near Forest. 

 Frequent. Newton Tripp. 



Viola incognita Brainard. Large-leaved White Violet. — Common in moist 

 woodlands. 



Viola renifolia Gray. Kidney-leaved Violet. — ^Frequent in swamps. 

 Newton Tripp. 



Viola pubescens Ait. Downy Yellow Violet. — Frequent in dry open woods 

 and thickets, especially on the shaded and fixed sand dunes along the Lake 

 Huron shore. 



Viola scabriuscula Schwein. Smooth Yellow Violet. — Common in damp 

 open woods and thickets. 



Viola canadensis L. Canada Violet. — Frequent in rich woods and thickets.- 



Viola striata Ait. Striped Violet. Damp shaded gromid near Forest. 

 Newton Tripp. 



Viola conspersa Reichenb. American Dog Violet. — Common in low and 

 shaded ground. 



Viola arenaria DC. Sand Violet. — Common on the sand dunes at Port 

 Franks. 



Viola rostrata Pursh. Long-spurred Violet. Frequent in rich open woods 

 and thickets. 



