races of the cowpea (Vigna wngwiculata) have the seed coat completely\ pigm ented, others have 110 pigment, while others have pigment confined to certain areas. In this paper the fully pigmented races are referred to as having, solid color, those without pigment as white, while the pigmented area of the partially pigmiented seed coats is called the "eye." This eve, when small, is always confined to the region of the hilumL, and when large always surrounds the hilum. It varies widely in size and form, as shown in the accompanyiln, illustrations, whiclh show the principal types of eye. In a the pigmented area is confined to two patches on opposite sides of the hilum. In b the area surrounds the hilum except at its micropylar end. bc d G g FI4. 1. Forms of the "eye," or piglelnt area, in the seeds of the cowNrpea. In c the hilum is completely surrounded, but there is a broad indentation at the lo wer end of the pigmented area. In dc the eve covers nearlyT the entire ventral1.
Pine-barrens extend as far west as Texas, and there ought to be some species of pinebarren plants confined to Louisiana and Texas, but too little is known of the flora of those parts as yet. Plants of muddy swamps seem from all accounts to be most numerous in the Mississippi embayment of the coastal plain, from about the mouth of the Ohio River southward. Characteristic species of this region, most of them woody plants, are:
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.