GRASS FAMILY 



209 



32. Poa epilis Scribn. 

 ^Mountain Bluegrass. Fig. 484. 



Poa piirpuiasccns Vasey, Bot. Gaz. 6: 297. 1881, not Spreng. 



1819. 

 Poa e/^ilis Scribn. U. S. Dejit. Agr. Div. Agrost. Circ. 9: 5. 



1899. 



Poa paddcusis Williams, V. S. Dept. Agr. Div. Agrost. Bull. 

 17, ed. 2: 261. /. 557. 1901. 



Perennial : culms erect, smooth, solitary or few in 

 a tuft, 2(.)-40 cm. tall ; sheaths smooth ; ligule of the 

 culm leaves about 3 mm. long ; Ijlades of the culm 

 about 3. tlat. 3-6 cm. long, 2-3 mm. wide, of the inno- 

 vations narrower, longer and usuallv folded, all 

 smooth : panicle usually compact and spike-like, 2-6 

 cm. long, usually purple, long-exserted ; glumes about 

 5 mm. long ; lemmas about 6 mm. long, smooth. 



Mountain meadows in the Alpine Zone; British Columbia 

 to the Mount Whitney region, California, east to Montana and 

 Colorado. July-Aug. Type locality: Colorado. 



33. Poa unilateralis Scribn. 

 San Francisco Bluegrass. Fig. 485. 



Poa unilateralis Scribn.; Vasey, U. S. Dept. Agr. Div. Bot. Bull. 

 13=: /./. S5. 1893. 



Tufted perennial; culms 10-40 cm. tall; sheaths 

 smooth, tawny and papery ; blades flat or folded, 

 shorter than the culms ; panicle oblong, dense and 

 spike-like, or somewhat interrupted below, 2-6 cm. long ; 

 spikelets 6-8 mm. long, perfect ; glumes broad, acute, 

 smooth, indistinctly scabrous on keel near apex, the 

 first 1-nerved or indistinctly 3-nerved, the second 3- 

 nerved ; lemmas 4 mm. long, not webbed at base nor 

 pilose, scabrous on base of marginal nerves and apex 

 of keel, the intermediate nerves faint ; palea ciliate on 

 keels. 



Cliffs, bluffs, and rocky meadows near the seashore, Hum- 

 boldt County to Monterey, California. May. Type locality: 

 .San Francisco. 



34. Poa vaseyochloa Scribn. 

 X'asey's Bluegrass. Fig. 486. 



Poa pnlchella Vasey, Bot. Gaz. 7: iZ. 1882, not Salisb. 



1796. 

 Poa vasexochloa Scribn. U. S. Dept. Agr. Div. Agrost. 



Circ. 9: 1. 1899. 



Perennial ; culms tufted, erect, slender, smooth, 

 10-20 cm. tall; sheaths smooth; blades smooth or 

 somewliat scabrous, slender, flat or involute, those 

 of the innovations mostly tiliform, mostly less than 

 5 cm. long, the 2 culm blades a little wider ; panicle y 

 ovate, 2-4 cm. long, the slender branches spread- 

 ing, bearing 1-2 spikelets; spikelets purple, 3-6- 

 flowered; glumes 2-3 mm. long, rather l)road; 

 lemmas smooth, or minutely scabrous. 3 mm. long. 



Rocks and hills, Cascade Mountains of Washington and 

 Oregon in the region of the Columbia River, and in the 

 Wallowa Mountains. Mar. -May. Type locality: Klickitat 

 County, Washington. 



