This is Poa arachnoidea, and promises to be one of the very best grasses for lawn purposes for Southern use. While it is so sensitive to heat that it will start into growth at a very low temperature, its roots run deep into the ground, and this enables it to hold on long after other grasses have had to succumb to summer heat and grass. It is allied to the Kentucky Blue grass, but is well characterized by webby hair under the flower, from which it takes its specific name, arachnoidea. It was so named by Dr. Torrey from specimens first found on Marcy's expedition into the Red river country.