248 PROCEEDINGS OF THE ACADEMY OF [DeC, 



14. GLOBIFERA.l. F. Gmelin. 

 Globifera J. F. Gmel., Syst. 2: 32. 1791. 



Type species, Anonymos umhrosa Walt. 



1. Globifera umbrosa (Walt.) J. F. Gmel. 



Anonymos umbrosa Walt., Fl. Carol. 63. 1788. Type, probably from 

 lower South Carolina, identified by Dr. S. F. Blake, in Rhodora 17: 131. 

 1915, as the species here considered. 



Micranthemum orhindalum Midix., Fl. Bor. Amer. 1: 10. pi. 2. 1803. Type 

 not verified, but description and plate evidently of species here considered. 

 Type of genus Micranthemum Michx. 



Micranthethum emarginatum Ell., Sketch Bot. S. C. and Ga. 1: 18. 1816. 

 "Grows in ditches and wet places — Vail 'Ombrosa, Great Ogechee." 

 . Type seen in Elliott Herbarium at the Charleston Museum. Said to be 

 "in the upper country, common," and characterized from the "very 

 common" (and evidently lowland) M. orbiculatum by its more remote 

 and larger leaves. Globifera umbrosa varies considerably in size of leaves, 

 but the ample collections at hand show this to be ecologic, and not to 

 distinguish plants of differing range. 



Wet loam or in shallow water, in woodland, especially in river- 

 bottoms, locally common throughout the Coastal Plain, especially 

 near the ocean. North Carolina to central Florida and eastern Texas; 

 rarely reported from above the fall-line. Also in eastern Mexico 

 and the West Indies. 



Flowering from May to October, and soon ripening fruit. Corolla 

 uniformly dull-white. Anthers red-brown. 



Pennell (Florida)— 9706. 



15. HEMIANTHUS Nuttall. 

 Hemianthus Nutt., Journ. Acad. Nat. Sci. Phila. 1: 119. pi. 6. 1817. 

 Type species, H. micranthemoides Nutt., of Pennsylvania. 



1. Hemianthus glomeratus (Chapm.) Pemiell, comb. nov. 



Micranthemum nultallii glomer- turn Chapm., Fl. S. Un. St. ed. III. 313. 

 1897. "Rivers and wet banks, South Florida." Tj^pe not verified. 



Sandy shores of lakes and rivers, known from Lake Okeechobee 

 and along the Gulf coast from Tampa to the Caloosahatchee River, 

 southern Florida. 



Flowering and fruiting probably throughout the year, the speci- 

 mens seen collected in May and November. Not seen growing. 



This may be distinguished from the other species of the Eastern 

 United States, Hemianthus micranthus (Pursh) Pennell (H. micran- 

 themoides Nutt.) of the Delaware and Chesapeake drainage by the 

 following contrast: 



Calyx-lobes obtuse or obtusish, less than one-fourth the length of the 

 tube. Anterior lobe of the corolla nearly as long as the portion 

 of the anterior lip below the base of the lateral lobes. 



H. micranthus. 



