PIPER FLORA OF THE STATE OF WASHINGTON. 141 



PUCCINELLIA. 



Panicle narrow, its base usually inclosed in the upper sheath, erect or the 



short lower branches sometimes divergent 1 . P. angustata. 



Panicle well exserted, the branches becoming divaricate or reflexed 2. P. distans. 



1. PuccineUia angustata (R. Br.) Nash, Bull. Torr. Club 22: 512. 1895. 

 Poa angustata R. Br. App. Parry's Voyage 287. 1824. 



Glyceria jmmila Vasey, Bull. Torr. Club 15: 48. 1888. 



Poa nutkaensis Presl, Rel. Haenk. 1 : 272. 1830. 



Type locality: Melville Island. 



Range: Seacoasts, arctic regions south to Oregon and Maine. 



Specimens examined: Whatcom County, SuJcsdorf 1027. 



2. PuccineUia distans (L.) Pari. Fl. Ital. 1: 367. 1848. 

 Poa distans L. Mant. 1 : 32. 1767. 



Type locality: "Habitat in Austria." 



Range: Seacoasts; subarctic regions south to Oregon and New Jersey. Europe. 



Specimens examined: Yakima City, Piper 2590; Wenas, Griffiths cfc Cotton 102, 73; 

 Seattle, Piper 1451 ; Clallam County, Elmer 1910. 



None of the above specimens are typical P. distans, but in the present confusion of the 

 genus they are tentatively so referred. 



BROMTJS. Brome grass. 



Spikelets strongly flattened. 



Awns less than 7 mm. long. 



Leaves linear, somewhat involute, pilose 1. B. subvelutinua 



Leaves linear-lanceolate, flat, not pilose 2. B. marginatum. 



Awns more than 7 mm. long. 



Panicle very broad, the longest rays 15 to 25 cm. long, droop- 

 ing 3. B. sitchensis. 



Panicle large but the rays not drooping 4. B. carinatus. 



Spikelets subterete, not strongly flattened. 



Native perennials mostly with loose and drooping panicles; lemma 

 usually more or less long-hairy. 

 Rays of the panicle not drooping. 



Panicle branches spreading, stiff; lemma scabrous or 



short-pubescent over the back 5. -5. orcuttianus. 



Panicle short and erect; lemma pubescent on the sides. . 6. B. suksdorfii. 

 Rays of the panicle drooping. 



Plant with rootstocks ■. 7. B. laevipes. 



Plants without rootstocks. 

 Lemma evenly pubescent. 



Panicle large, heavy; culms stout. 8. 5. pacificus. 



Panicle small; culms slender 9. B. eximius. 



Lemma unevenly pubescent 10. fi. richardsonii. 



Introduced annuals or biennials. 



Awns much longer than the body of the narrow lemma. 



Lemma pubescent; awns 13 to 15 mm. long 14. B. tectorum. 



Lemma not pubescent. 



Awns 35 to 45 mm. long 1 1 . B. maximus. 



Awns less than 30 mm. long. 



Panicle a dense head-like cluster \2. B. ruhens. 



Panicle loose 13. B. sterilis. 



