GRASS FAMILY ' 155 



spikelets toward the extremities; spikelets rather loosely flowered, 2 to 3 lines 

 long; glumes 1 and 1^/2 lines long; lenuiias acute or almost cuspidate, l^A to 2 

 lines long, smooth, rather obscurely nerved, conspicuously webbed at base. 



Coast Ranges from Humboldt Co. to Santa Cruz Co. 



Locs. — Humboldt Baj', Chandler 1183; Mendocino, Brown 763; Comptche, McMuri>]i!i 476; 

 Eussian Guleh, Daty 6584; Santa Cruz Co., Elmer 5029. 



Ref. — POA KELLOGGii A'asey, U. S. Dept. Agr. Div. Bot. Bull. 13=: pi. 79. 1893, type Bokinchr 

 4705 (from Mendocino Co. ace. Bolander 's Field Book). 



11. P. douglasii Nees. Perennial from exteusively creeping rhizomes; culms 

 ascending from a decuiubent base, usually less than a foot high ; sheaths 

 smooth, tawny and papery; blades involute, some of these usually exceeding 

 the culm ; panicles dioecious, ovoid or oblong, dense and spike-like, 1 to 2 inches 

 long, % inch wide, pale or tawny ; spikelets 3 to 5 lines long, about 5-flowered ; 

 glumes broad, 3-nerved, smooth, scabrous on upper part of keel, nearly equal, 

 2 to 3 lines long; lemmas 3 lines long, slightly webbed at base, villous on the 

 lower part of keel and marginal nerves, scabrous on keel above, 1 to 3 pairs of 

 indistinct intermediate nerves; palea ciliate on keels. 



Sand dunes near the coast, Pt. Arena to Monterey. 



Locs. — Pt. Arena, Davy 4" Blasdale 6045; Bodega Bay, Heller 5187; Pt. Eeyes, Davi/ 

 6742; San Francisco, Bolander 1528, 6074, Piper 6223; Oakland, Jones 3258; Santa Cruz, 

 Anderson; Monterey and vicinity, Cliase 5655, Davy 7291, Eitchcock 2596. 



Eefs.— PoA DOUGLASII Nees, Ann. Nat. Hist. 1: 284. 1838; Thurb. in Wats. Bot. Cal. 2: 

 314. 1880; Davy in Jepson, FI. W. Mid. Cal. 66. 1901. 



12. P. pratensis L. Kentucky Bluegrass. Perennial from creeping rhi- 

 zomes ; culms tufted, 1 to 3 feet high, terete or slightly flattened ; sheaths 

 smooth, compressed; ligule about 1 line long; blades soft, flat or folded, the 

 basal often elongated; panicle pyramidal, open, the slender branches in remote 

 fascicles of 3 to 5, ascending or spreading, naked at base, some of them short ; 

 spikelets crowded, 3 to 5-flowered. 2 to 2l^ lines long; lemmas II/2 lines long, 

 copiously webbed at base, silky-pubescent on the keel and marginal nerves, 

 the intermediate nerves prominent.' 



Open woods, banks, open ground, except in the deserts; extends through- 

 out the northern part of North America and Eurasia; extensively cultivated as 

 a pasture and lawn grass. Some forms are clearly native in the mountains, 

 while other forms, especially at low altitudes are escaped from cultivation. 



Eefs.— Poa pratensis L. Sp. PI. 67. 1753; Thurb. in Wats. Bot. Cal. 2: 312. 1880; Davy 

 in Jepson, Fl. W. Mid. Cal. 66. 1901 ; Abrams, Fl. Los Ang. 50. 1904. 



P. trivialis L. is mentioned by Thurber (Wats. Bot. Cal. 2 : 313. 1880) as being 

 introduced aloiii;- the Coast Ranges. 



13. P. rhizomata llitchc. n. sj). Perennial from creeping rhizomes; culms 

 erect, 1 to 2 feet high, smooth; sheaths smooth, the lower loose and paperj'; 

 ligule 1 to IVl' lines long; blades flat or folded, 1/4 to 1 line wide, 1 to 3 inches 

 long, the culm blades about 2, the upper erect, about 1 inch long; panicle 

 long-exserted, oblong, contracted, 1 to 2 inches long, tlie branches short, slen- 

 der, mostly in 2's, ascending, few-flowered; spikelets about 3 lines long, 3 to 

 5-flowered ; glumes unequal, rather broad, acute, scabrous on the keels, the 

 first 1-nerved, ]i/4 lines long, the second 3-nerved, 2 lines long; lemmas 21/2 

 lines long, acutish, copiously webbed at base, short-pilose on keel below, and 

 sparingly so on lower part of marginal nerves, the intermediate nerves faint, 

 sparingly scabrous between the nerves; palea ciliate on the keels. — (Perennis 

 e rhizomatibus repentibus; culmi recti, 1-2 ped. alti, glabri; vaginae glabrae; 



