ANDROPOOONE.E. 55 



Var. incanescens Hack. 1. c. Joints of the spikes clotted with 

 white luiirs ; sessile spikelets 11 mm. long; first glume longer than 

 the second, both sparingly pilose on the keels. 



Colorado, Vasey. 



Var. muticus Hack. D. C. Monog. Phan. 444 (1889). Like 

 incanescens, excepting that the fourth glume is awnless. Leaves 

 and spikelets sparingly pruinose. 



Montana, Ward; Colorado, Vasey. 



22. A. geminata Hack. ined. A. HaUii Hack. var. bispicata 

 Vasey. 



Plant glaucous, smooth, excepting the margins of the leaf-blades. 

 Culms simple, rather stout, 60-100 cm. high, from hard creeping 

 rootstocks. Sheaths terete, the lower as long as the internodes, 

 the upper shorter; ligule ciliate, 1.5 mm. long; blades setaceo- 

 acuminate, the lower 30 cm. long, 4-6 mm. wide. Spathes 10-12 

 cm. long. Spikes 2, at the apex of the culm and one of the two 

 branches, 3-4 cm. long; partially included, rachis and pedicels 

 pubescent on the edges with white or yellowish hairs. Sessile 

 spikelets 8 mm. long, linear-lanceolate, green or tinged with red; 

 first glume firm, minutely 2-toothed, 6-nerved, the back with a ver- 

 tical groove; second as long as the first, lanceolate, compressed, 

 1-nerved, the margins hyaline; third 6 mm. long, linear-lanceolate, 

 3-iierved, the upper third of the margins ciliate; fourth 5 mm. 

 long, 2-toothed. Pedicellate spikelet as long as the sessile, nar- 

 rowly lanceolate; first glume flat below, keeled toward the apex, 

 9-nerved; second 6 mm. long, 5-nerved, the margins ciliate along 

 the upper third. Xealley, for Nat. Mus. 



23. A. provincialis Lam. Encycl. 1:376(1783). A. fnrratus 

 Muld.; Willd. Sp. 4:919 (1806). Blue Stem. Blue Joint. 

 Turkey Foot. Finger Grass. 



Culms 100-150 cm. high, rigid, branching above. Sheaths terete, 

 glabrous, rarely villous; ligule 1-1.5 mm. long; blades of thrifty 

 plants 60 cm. long, 7 mm. wide, upper narrow, 1-4 mm. long. 

 Spikes 3-8, digitate, 3-10 cm. long. On the sessile spikelet first 

 glume 6-nerved, otherwise like the first one on the sterile spikelet; 

 second compressed-keeled, 3-nerved, 5 mm. long; fourth bifid with a 



