. California grasslands and range forage grasses. Grasses; Forage plants. 3. OAT TRIBE (AVENEAE) Spikelets 2-several-flowered in open or contracted panicles; glumes usually as long or longer than the first lemma, commonly longer than all the florets; lemmas usually awned from the back, the awn mostly bent and twisted. Some genera in this tribe, Koeleria, approach Festuceae. A small tribe, but containing the cultivated oat and several important forage grasses, of which wild oats are especially valuable. 17. Avena (p. 74) 18. Danthonia (p. 75) KEY TO GENERA Spikelets awnless or lemmas rarel
. California grasslands and range forage grasses. Grasses; Forage plants. 3. OAT TRIBE (AVENEAE) Spikelets 2-several-flowered in open or contracted panicles; glumes usually as long or longer than the first lemma, commonly longer than all the florets; lemmas usually awned from the back, the awn mostly bent and twisted. Some genera in this tribe, Koeleria, approach Festuceae. A small tribe, but containing the cultivated oat and several important forage grasses, of which wild oats are especially valuable. 17. Avena (p. 74) 18. Danthonia (p. 75) KEY TO GENERA Spikelets awnless or lemmas rarely minutely awned 20. Koeleria (p. 79) Spikelets awned Spikelets large, cm long, rarely 1 cm; awns prominent Spikelets 2—3 flowered, lemmas acuminate, toothed; plants annual Spikelets several-flowered; lemmas bifid; plants perennial Spikelets not more than 8 mm long, 2-3 flowered, awned Spikelets falling entire; first floret awnless, the second with a hooked awn; plant velvety 23. Holcus(p. 81) Spikelets not falling entire, the glumes persistent; plants not velvety Florets 2, the lower staminate, awned, the upper perfect, awnless 22. Arrhenatherum (p. 81) Florets 2 or more, all alike except the reduced upper ones Lemmas keeled, the awn from above the middle 21. Trisetum (p. 79) Lemmas convex, awned from below the middle 19. Deschampsia (p. 77) 17. WILD OATS (AVENA) Two European introduced annual species of wild oats are found in California. Of these, wild oats is more abundant than slender wild oats, but both are high in forage value and respond similarly to grazing management. (Fig. 63.) Key to Species Teeth of lemma acute, short 1. A. fatua Teeth of lemma awned, 4 mm long 2. A. barbata 1. WILD OATS (Avena fatua) is a stout leafy annual, branching at base; culms mostly lV2-2y2 ft (45-75 cm) tall; pan- icle large, loose and open; spikelets pen- dulous, about cm long, the glumes strongly nerved, shining; lower part of lemmas and rachillas clothed with long stiff brown
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Keywords: ., boo, bookcentury1900, booksubjectforageplants, booksubjectgrasses
