FESTUCE^. 589 



It varies considerably in len<jth of panicle and in number of 

 spikelets. 



Open woods, New Engiiind to Minnesota and Texas. 



Var. Shortii (Kunth) F. Shortii Knnth, AVood's Class-book, 794 

 (1863). F. obtusa Spreng. Mant. Fl. Hal. 34 (1807). F. nutans, 

 var. palustris Wood, Bot. and Flor. 399 (1873). F. nutans major 

 Vasey, Grasses U. S. Sp. Kept. U. S. Dept. Agr, No. 03, 43 (1883), 

 name only. 



Panicle more or less contracted, rays bearing more numerous 

 clustered spikelets. 



Iowa, HitchcocTc; Mississippi, Tracy; Minnesota, Sandberg. 



Kentucky, Illinois, Missouri to Iowa, and Minnesota. 



8. F. versuta, \\q^ name. F. Texana Vasey, Bull. Torr. Club, 

 13: 119 (1S8G). not Steud). 1855). 



Culms rather stout, GO-80 cri~. high. Sheaths shorter than the 

 internodes; ligule a mere callous ring; blades of the culm 3-4 in 

 number, flat or involute, scarious, 10-20 cm. long, 6-10 mm. wide, 

 apex taper-pointed. Panicle thin, pyramidal, about 15 cm. long, 

 rays in pairs below, scabrous, nodding, somewhat distant, the longest 

 7-10 cm. long, few-flowered on tlie outer fourth or third. Spike- 

 lets pedicellate, light green, glaucous, linear, 3-5-flowered, about 8 

 mm. long, joint of rachilla 0.6 mm. long, empty glumes rigid, 

 scabrous on the nerves, first linear-lanceolate, 3.5-4.5 mm. long, 

 second broader, 4.5-5 mm. long; floral glume 5 mm. long, ovate- 

 lanceolate, subacute, mucronate or short-awned, chartaceous; palea 

 nearly as long as its glume. 



Texas, Eeverrhon in 1884 for Scribn. 



9. F. denticulata, new name. F. ambigua Xnsey, Contrib. U. S. 

 Nat. Herb. 1:2:7 (1893), not Le Gall. (1852). 



A rather stout erect perennial, 60-90 cm. high. Leaves of 

 sterile shoots rather rigid, 15-20 cm. long, 2-4 mm. wide; those 

 of the culm 4, sheaths scabrous, longer than the internodes; ligule 

 very short, slightly unsymmetrical ; blades attenuate, i:)ointed, flat or 

 becoming involute. Panicle 15-20 cm. long, tlie nodes distant, 

 rays flexuose, chiefly in pairs, the longest 7-10 cm. long, bearing 

 spikelets above the middle. Spikelets purplish, 3-4-flowered, enijity 



