was included. They are quite distinct species, however, and hence texensis is not the state flower.
Drummond's Phlox, rated the most loved of all garden annuals and cultivated in every civilized country on earth, is native of the same region and not known to be native elsewhere, at least not with the beautiful shade of deep red which charactrized the plant upon which the original description and the colored illustration accompanying it were based some hundred years ago. Seeds sent to England by Drummond were planted, the species figured and described, and the plant widely introduced into gardens by the Botanical Garden at Edinburgh. It thrived in cultivation, grew in favor, produced a prodigious number of varieties, and has, within the short space of a century, attained first place among cultivated garden annuals: Its behavior, both wild and under culture, has led many to believe that hybridity was involved in the original col' lection of seeds and that the immense number (150 or more) of varieties has been produced by the segregation of sets of heritable unit characters. (See frontispiece.)
Also south of the Brazos, the region is cleft by the Fayette Prairie. Again, marl of limestone origin and with a very fine texture, highly colloidal 10 in nature, is correlated with the vegetational cover of the cleavage grassland (Region 3). The lower fork of Region 16, char acterized by diminishing height and increasingly open stand of the postoaks, reaches the vicinity of Sinton in San Patricia County. Its line of contact with the Pine-Oak Forest constituting Region 17 will be discussed in connection with that region.
In the general, the vegetation and agricultural adaptations of the region are very similar to those of the preceding two. Rainfall con tinues to increase eastward and is reflected in a taller and denser stand of timber; but, otherwise, the -differences are too slight to warrant any attempt at description within our limited space.
18 Colloidal. This term means that the individual particles are so fine as to cause a wet mass rubbed between the fingers to appear smooth-textured and gelatinous. This fineness of texture prevents the particles from existing as separate granules (as in sands); it causes them when dry rather to adhere tightly together in aggregate clumps ranging in size from flocculate crumbs to hard clods.
The Vegetation of Texas