234 
IOWA ACADEMY OF SCIENCES. 
MALVACEAE. 
Malva L. 
375. M. sylvestris L. High Mallow. Streets of Esther- 
ville; adventive from Europe. 
376. M. rotundifolia L. Running Mallow. Streets of 
Estherville; introduced from Europe. 
Hibiscus L. 
377. IT. trionum L. Bladder Ketmia. Venice Mallow. 
Rarely escaped from cultivation; a native of 
southern Europe. 
HYPERICACEAE. 
Hypericum L. 
378. H. canademe L. Rare in wet places. 
Triadenum Raf. 
379. T. virginicum (L.) Raf. ( Elodea canipanulata 
Pursh.) Common in marshes. 
CISTACEAE. 
Helianthemum Pers. 
380. II. canadense (L.) Michx. Frostweed. Very rare 
on gravelly banks. 
VIOLACE^}. 
Viola L. 
381. F pedatifida Don. (F delphinifolia Nutt.) 
Prairie Violet. Common on dry prairies. 
382 1 . V. obliqua Hill. (F cucullata Ait.) Meadow 
Violet. Very common in low ground; variable. 
383. F pubescens Ait. Yellow Violet. Common in 
woods. 
LYTHRACEAE. 
Lythrum L. 
384. L. alcitum Pursh. Very common in low ground. 
