318 OHIO BIOLOGICAL SUKVEY 



Polygala senega L. Seneca Snakeroot. Fide Bigelow. 



Polygala incarnata L. Pink Milkwort. Fide Bigelow. Xo authentic specimens are 

 now known from Ohio. 



Euphorbiaceae, Spurge Family. 



Aealypha virginica L. Virginia Three-seeded Mercury. 

 Acalypha graeiliens Gr. Slender Three-seeded Mercury. 



Titythynialus lathrus (L.) Hill. (Euphorbia). Caper Spurge. Known from Hock- 

 ing County only. 

 Titythynialus obtusatus (Pursh) K. & G. Blunt-leaf Spurge. Fide Bigelow. 

 Titythymalopsis corallata (L.) K. & G. (Euphorbia). Flowering S]mrge. 

 Chamaesyce preslii (Guss) Arth. (Euphorbia nutans). Nodding Spurge. 

 Chamaesyce maculata (L.) Small. (Euphorbia). Milk Spurge. 



Callitrichaceae, Water Starwort Family. 

 Callitriche sp. Fide Bigelow. 



Malvales. 

 Malvaceae, Mallow Family. 

 Abutilon abutilon (L.) Eusby (A. theophrasti Medic). Velvet Leaf. Common. 



No specimen. 

 Malva rotundifolia L. Low Mallow. Xo specimen. 

 Xapaea dioica L. Glade Mallow. 

 Sida spinosa L. Prickly Sida. Xo specimen. 

 Hibiscus militaris Cav. Fide Bigelow. 



Tiliaceae, Linden Family. 

 Tilia americana L. Basswood. 



Guttiferales. 

 Hypericaceae, St. .Tohn"s-wort Family. 



Ascron hypericoides L. St. Andrew 's Cross. 



Hypericum ascyron L. Fide Bigelow. 



Hypericum prolificum L. Shrubby St. John 's-wort. 



Hypericum {tunctatum Lorn. (IL umculatum). Spotted St. John 's-wort. Fide 



Bigelow. 

 Hypericum mutilum I,. Dwarf S. .Tohn 's-wort. 

 Hypericum drummundii (Grev. & Hook.) T. & G. Drummond's St. John 's-wort. 



A single statiiui mi the to|> of the cliff overlooking the junction of "The Gulf' 



with the Canyon of Clear Creek, fairly numerous in 19(19, less so in 1910 and 



1911. The extreme eastern edge of its range. 

 Sarothra gentianoides L. Orange Grass. Fide Bigelow. 



Cistaceae, Rock-rose Family. 

 Crocanthemum niajus (L.) Britt. (Helianthemum). Hoary Frost-weed. 

 Lechea minor L. Thyme-leaf Pinweed. 

 Lechea racemubosa Mx. Oblong-fruited Pinweed. 



Violaceae, A'iolet Family. 

 Cubelium concolor (Forst.) Raf. (Hybanthus). Green Violet. 



