488 POACE^. 



20-30 cm. long, rays single or in twos, diverging, bearing spikelets 

 nearly to the base, rigid, ciliate in the axils. Spikelets light-colored, 

 on pedicels 1-2 mm. long, appressed or spreading, linear to ovate, 

 compressed, 6-12-flowerecl, 4-6 mm. long; empty glumes ovate- 

 lanceolate, 1-nerved, scabrid on the keel; first about 1.5 mm. long, 

 second about 2 mm. long; floral glume ovate-lanceolate, thin, the 3 

 nerves moderately conspicuous, 1.7-2 mm. long; palea slightly in- 

 curved, linear when not spread, obtuse, slightly ciliate on the keels, 

 1.5 mm. long. Nearly allied to E. pectinacea. 



Texas, E. Hall 785, RevercJion; New Mexico, Wright 772. 



22. E. refracta (Muhl.) Scribu Mem. Torr. Club, 5: 49 (1895). 

 Poa refracta Muhl. Gram. 146 (1817). E. campestris Trin. Bull. 

 Sci. Acad. St. Petersb. 1: 70 (1836). E. pectinacea^^iX. refracta 

 Chapm. Fl. S. States, 564 (1860). 



Perennial ; light lead-colored or purplish, culms branching only 

 at the very base, erect, firm, 40-60 cm. high. Throat of sheath 

 bearded; blades rigid, smooth, fiat, or involute, 20-30 cm, long, 

 about 2 mm. wide. Panicle open, thin, oval, 30-60 cm. long, rays 

 bearded at the base. Spikelets mostly sessile along the stiff 

 branches, linear, fiat, 8-30-fiowered, 7-12 mm. long; empty glumes 

 lanceolate, 1-nerved, 1.7-2 mm. long; floral glume ovate, deltoid, 

 acute when spread, with 3 prominent nerves, 1.7-2.1 mm. long; 

 palea incurved, linear, ciliate on the keels, 1.3 mm. long. Grain 

 oval, very slightly compressed, 0.7 mm. long. 



Delaware and Maryland, Cayiby; South Carolina, Ravenel; Flor- 

 ida, CurtissZbOO; Mississippi, Tracy. 



Delaware, Florida, Mississippi and Texas. 



23. E. pectinacea (Michx.) Nees, Fl. Afr. Austr. 406 (1841). 

 Poa jyectinacea IsiiGhx. Fl. Bor. Am. 1:69 (1803). 



A tufted firm grass, culms simple, 30-60 cm. high. Sheaths 

 hairy, the throat prominently so; blades rigid, fiat or involute, 

 mostly smooth below, often hairy or scabrid above, 20-40 cm. long, 

 3-5 mm. wide. Panicle usually purple, widely diffuse, compound, 

 oval, 20-30 cm. long; rays in twos, threes or mostly single, rigid, 

 diverging, bearded in the axils, tlie capillary pedicels 0.5-3 mm. 

 long, appressed when young, but diverging Avith age. Spikelets 



