Grasses of the Trans-Pecos and Adjacent Areas

absent Acacia Achenes Agave anthers apex bark Benth bracts branches Brewster Brewster County calyx Canyon carpels Chih Chihuahuan Desert Chinati Mts Chisos Mountains Chisos Mts clusters cm long cm wide Coah common corolla counties Creek Culberson Davis Mts dense distributed drupe Edwards Plateau Engelm flattened Franklin Mts Fruit a capsule fused genera genus glabrous Glass Mts Gray Guadalupe Mts habitats hairs hairy herbaceous herbs Hudspeth involucre Jeff Davis lanceolate Leaf blades leaflets Leaves alternate Leaves opposite limestone linear lobes margins Mexico Mountains occur in Texas Opuntia ovary ovate pappus Paso Pecos River perennial Perityle petals petioles phyllaries pinnate pistillate plants Presidio pubescent Quercus rarely ray flowers rocky roundish seeds sepals shrubs Sierra Vieja slender slopes small trees solitary species occur spines stamens stems style subshrubs subsp Terrell texana toothed Torr Trans-Pecos tube unisexual upper Val Verde whitish widespread woody yellow Yucca