This list grew from an earlier Kansas list of grasses and legumes that emphasized chiefly range and pasture plants. It is extended here to include most plant families and genera that occur in Kansas and many species that do not necessarily occur in Kansas but may be important or closely related to those listed. Obviously, not all Kansas plants could be included, and therefore many minor plants have been omitted. Species not obviously important had to be somewhat arbitrary. Perhaps certain species listed could have been omitted and others not included might have been added. The list can, therefore, grow or be altered as need for change is shown. If further information on common names is needed, the Kelsey and Dayton 1942 edition of Standardized Plant Names[3] should be consulted. =Genus Common Names= In preparing this list, we attempted to give a single common name to each genus and to use it in connection with common names for each of the species listed under that genus. For example, brome for the genus, _Bromus_, and various species such as smooth brome and hairy brome. Thus, there are two words for species names. However, common names of some species are single words and may not bear the generic name at all; for example, switchgrass, curlymesquite, catchflygrass, darnel, needleandthread, berseem, and horsebean. Some genera have more than one common name, but in that case the genus is subdivided into different types, each with its own common name. For example, most species of the genus _Panicum_ are called panicum, but certain others are witchgrass; _Melica_ is melic, but bulbous species of that genus are called oniongrass; and _Setaria_ is bristlegrass, but the name millet is applied to certain ones. Some poisonous species of _Astragalus_ are called loco, but nonpoisonous ones are milkvetch and the selenium-gathering ones, poisonvetch. In a few cases the same common name is applied to two genera, but that generally occurs only when the genera involved are closely related. They may formerly have been considered a single genus. The words tree, grass, bean, seed, etc. are combined with key words to make common names of many genera and species. Examples of the former are dropseed, cupgrass, tanglehead, peavine, wildindigo, coffeetree, and sensitivebriar; and of the latter, breadroot scurfpea, splitbeard bluestem, shortawn foxtail, and smoothseed wildbean. Hyphens are avoided except in a few cases where they are used to make spelling, meaning, or pronunciation more clearly understood. Some examples are s-curve threeawn, blue-eyedgrass, climbing-buckwheat, dutchmans-breeches, snow-on-the-mountain, fat-hen saltbrush, false-alyssum. =Species Common Names=