108 BOTANY OF MICHIGAN 



VITACEAE. Vine Family 



Psedera vilacea (Kneer) Greene. Grape-like Virginia creeper. In 

 rich woods and on banks of streams. A vine and tree climber. Fre- 

 quent throughout. 



Vitis vulpina L. Riverside grape. Plentiful on Round Island in 

 Mackinac County. Not noticed elsewhere yet (1915) in the Upper 

 Peninsula. 



TILIACEAE. Linden Family 



Tilia americana L. Occasional in hardwoods and reaching the south 

 shore of Lake Superior. Trees often very large. 



MALVACEAE. Mallow Family 



Abutilon theophrasti Medic. (A. abutilon (L.) Rusby). Velvet-leaf. 

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



Malva rotundifolia L. Common mallow. Cheeses. Plentiful as a 

 weed in waste places and cultivated grounds. 



Malva moschata L. Musk mallow. Noticed as a weed in fields and on 

 roadsides west of Manistique. 



HYPERICACEAE. St. John's-wort Family 



Hypericum ascyron L. Great St. John's-wort. Damp open ground 

 and on banks of small streams west of Manistique. Apparently infre- 

 quent. 



Hypericum kalmianum L. Kalm's St. John's-wort. Usually in dry, 

 sandy, open ground on and near the sandy beaches of Lake Michigan 

 and Lake Superior. Often plentiful. 



Hypericum ellipticum Hook. Pale St. John's-wort. Wet places, along 

 streams and on wet sandy shores. Frequent. 



Hypericum boreale (Britton) Bicknell. Northern St. John's-wort. 

 Very wet boggy places and margins of ponds. Frequent. 



Hypericum virginicum L. {Triadenum virginicum (L.) Raf.). Marsh 

 St. John's-wort. Open marshy and swampy places. Frequent. 



CISTACEAE. Rockrose Family 



Helianthemum canadense (L?) Michx. (Cracanthemum canadense (L.) 

 Britton). Long-branched frostweed. On sand dunes west of Manis- 

 tique. Plentiful. Prof. C. A. Davis, 1905. 



Hudsonia tomentosa Nutt. False heather. Sandy beaches of Lake 

 Michigan and Lake Superior. Often abundant. 



