102 ERYTHEA. 



brownish ; leaves of the sterile shoots rather numerous, the blades 

 about 2 dm. long, flat or equitantly folded, cuspidate pointed, per- 

 fectly smooth ; sheaths smooth, about half as long as the blades, the 

 ligule obsolete; culm leaves 3, the blades flat, cuspidate pointed, 

 3-6 cm. long, 2-3 mm. wide, smooth at base, minutely scabrous 

 on each side towards the apex; sheaths smooth, shorter than the 

 internodes, the ligule 1 mm. or less in length, hyaline; panicle pale 

 green, lax, more or less drooping, about 1 dm. long, narrow; rays 

 3—5 at each node, slender, flexuous, rather erect, sparsely sca])rous, 

 the longest not exceeding 5 cm. ; spikelets ovate-lanceolate, acutish, 

 7-10 mm. long, on pedicels about as long, 4-6-flowered; empty 

 glumes subequjil, membranous, the lower 3-3.5 mm. long, acute, 

 narrowly hyaline margined, 3-nerved, the lateral nerves short or 

 sometimes obsolete, the mid-nerve sparsely scabrous; the upper 

 acute with a broad scarious margin, 4 mm. long, 3-nerved, sparsely 

 scabrous on the nerves and on the scarious margin ; flowering glumes 

 membranous, ovate, 5 mm. long in the lowest florets, naiTowly 

 scarious margined, acutish, 5-nerved, the nerves scabrous; palet 

 nearly as long as the flowering glume; scabrous-ciliate on the two 

 nerves, sharply acute; joints of the rachilla sparsely scabrid. 



Base of basalt cliffs in pine woods, Spokane, Wash., 28 May, 1898, 

 No. 2820. Named in honor of Mrs. Mary P. Olney, well known as 

 a conchologist, to whom I am indebted for many botanical favors. 



This Poa is one of the most beautiful known to me and will 

 doubtless prove of value agriculturally. Perhaps nearestP. Wheeleri 

 Vasey. 



Poa Spillmani. Perennial, pale green, in dense tufts; culms 

 6-7 dm. high, smooth below, scabrid above, terete, striate; basal 

 leaves numerous, the blades erect, narrowly filiform, involute, 

 scabrous, 2-3 dm. long; sheaths smooth, about 1 dm. long, the 

 old ones persistent; ligule minute; cauline leaves 2, filiform, 

 involute, the scabrous blades 5-6 cm. long, 1 mm. wide, the nearly 

 smooth sheaths shorter than the internodes ; ligules hyaline, acute 

 or obtuse, 1 mm. long; panicle narrow, erect, not dense, 1 dm. or 

 less long ; rays erect, slender, more or less flexuous, mainly in threes 

 and fours, scabrous on the angles ; spikelets 5-9 mm. long, ovate, 

 acute, loosely 4-7 -flowered, on stout pedicels usually shorter than 



