VASCULAR PLANTS OF OHIO 173 



792. Croton monanthogynus Mx. Single-fruited Croton. Franklin 



County. 



793. Acalypha virginica L. Virginia Three-seeded Mercury. General. 



794. Acalypha graeilens Gr. Slender Three-seeded Mercury. Rather 



general. 



795. Acalypha ostryaefolia Ridd. Hornbeam Three-seeded Mercury. 



Washington County. 



796. Mercurialis annua L. Mercury. Lake County. Introduced. 



797. Ricinus commuiiis L. Castor-oil-plant. Brie, Ottawa, Franklin. 



Escaped. 



798. Poinsettia dentata (Mx.) Small. Toothed Spurge. Lake, Cuya- 



hoga, Ottawa, Lucas, Franklin, Greene, Warren, Hamilton. 



799. Tithymalus lathyrus (L.) Hill. Caper Spurge. Hocking Coun- 



ty. From Europe. 



800. Tithymalus obtusatus (Pursh) K. & G. Bluntleaf Spurge. 



Lucas, Wyandot, Auglaize, Jackson, Hamilton. 



801. Tithymalus platyphyllus (L.) Hill. Broadleaf Spurge. Ash- 



tabula, Cuyahoga. From Europe. 



802. Tithymalus helioseopia (L.) Hill. Sun Spurge. Lake County. 



From Europe. 



803. Tithymalus cyparissias (L.) Hill. Cypress Spurge. General. 



From Europe. 



804. Tithymalus peplus (L.) Hill. Petty Spurge. Clark, Erie, Sum- 



mit, Lake. From Europe. 



805. Tithymalus commutatus (Eng.) K. & G. Tinted Spurge. Gen- 



eral. 



806. Tithymalus corollata (L.) K. & G. Flowering Spurge. General 



and abundant. 



807. Dichrophyllum marginatum (Pursh) K. & G. Snow-on-the- 



mountain. Lake, Cuyahoga, Erie, Auglaize, Franklin, Clark, 

 Montgomery, Hamilton. From the West. 



808. Chamaesyce preslii (Guss.) Arth. Nodding Spurge. General 



and abundant. 



809. Chamaesyce rafinesqui (Greene) Small. Hairy Spurge. Defi- 



ance, Vinton. 



810. Chamaesyce humistrata (Eng.) Small. Hairy Spreading Spurge. 



Cuyahoga, Erie, Belmont, Champaign. 



811. Chamaesyce maculata (L.) Small. Spotted Spurge. Rather 



general. 



