BLUE GRASS (Poa pratensis), a perennial rough-stalked meadow grass which owes its name to the tiny, bright blue flowers it bears. It is also called June grass, spear grass and meadow grass. The seeds are brown in colour. Common to meadows all over temperate parts of the United States, Europe and Asia, it has reached greatest perfection in the limestone regions of Ken tucky aqd Tennessee. Because of the plentiful and high-quality blue grass crops in this State, Kentucky is known as the "Blue Grass State." Blue grass, while usually sown from seed by the farmer for pasture land, is generally present in permanent grass-lands which are moderately well drained and in a fair condition of fertility, and is indispensable for any mixed pasture in the eastern United States. It also yields hay of fine quality, but not of great quan tity. It is widely spreading in habit and under favourable con ditions forms a dense sod. It grows in clump-like formations with a considerable growth of lower leaves; the stem is com paratively short and slender. For sowing purposes, the blue grass seeds are harvested and before being marketed are sub jected to a rubbing process which frees them of their silky, webby hairs.