• 



17 . 



ft 



different in habit fr m [)istiehlis as it never gritws «»ii flat nor alka- 

 line soil, but on high slopes in sweet oil from the <>ak gottt to the 

 t*di,>e of the alpine, Comparing it with P« a glumaris its steins are 

 densely aggregated at the out* r td#e« of the tufts but eonneeteed 

 b\ stout and rigid rootstocks which are verv short between the 

 stems, unlike Pua gin mans The leaves are flat and course and 

 the ligule a short and hyaline bund as in glumaris. bur the leaf 

 ribs are sharp and not rounded as in the other. The spikelets are 

 in a linear not oblong panicle and more eloseh apprensed. The 

 The rays are twin, one of them often branching just above the 

 base, conspicuously flattened, not angled as in the other, straight 

 and not flexuous as in the other which also has the rays in threes 

 or multiples. At the insertion of the rays is a yellow callus sur- 

 rounding the rachis which is winged but smooth on the lower- 

 nodes, each joint or branch has a similar callus at base and tip of 

 pedicel. In P, glumaris the callus does not go aeross except at 

 very base and is hairy. The spikelets are perfect in glumaris and 

 always dioecious in Kingii, much flattened in both; 5-7 flowered 

 or rarely less in glumaris and oblong, normally 3-flowered and 

 rarely 5-flowered, normally lanceolate and rarely ovate in Kingii. 

 The rachilla'in glumaris is flexuous. conspicuous and hairy; in 

 the other straight, smooth and visible only on dissection and thus 

 spikelet becomes ovate when 5 flowered. The glumes in glumaris 

 are thin like the lemma but not differing above, narrowly ellipti- 

 cal, hardly acute, 3-nerved and keeled to the tip, about smooth 



and about as long as lemma; in Kingii they are conspicuously 

 translucenfand hyaline except at very base, acuminate and wry 

 acute, ovate to narrowly lanceolate, from £-§ the lemma, about 



smooth, slightly one to several- nerved at very base and not 

 keeled, terminated below with a short ring-like callus .-is in Bro- 

 mus, Festuca, etc. The lemma of glumaris is lanceolate, acute, 

 thin, keeled to near the tip, strongly 3-5 nerved and silicate be- 

 tween the nerves, occasionally with a few faint intermediate nerves. 

 strongly scabrous-puberulent above and conspicuously long-hairy 

 at base; the lemma of Kingii is similar in shape mostly, very acute 

 and thin, with flat areas between the equally raised ribs, variably 

 5-7-nerved, often with 3 additional nerves between the main ones 

 and so making 15-21 nerves in all, rounded on the back, scabrous- 

 puberulent and equally so all over to nearly smooth, not hairy, 

 notched and eared at tip like Bromus, and with midrib produced 

 as a sharp point or minute awn. 



Comparing Wasatchia with Distichlis the same can be said 

 of its habit of growth as differing from Poa glumaris. The leaves 



