URAMiNEAK (UUAMS FAMILV) 91 



64. Cataljrosa. Splkolots 2-n<.\vore(l. 



■^ ■-- LiMiimfls O-maiiy-norved (norvoa often obscure in Brifsa). 



<i. Spikdlrifi nearly ROfisilu in donw l-HMod clustorn at the end of the few iwnicle-braiiclioa. 



70. Dactylis. Bplkolots (lattoned ; glumes and Iciiinias koolod, the kools hlHpld-oiliato. 



a (t. Splkolots not in donso l-sidod cIuHtdrs. 



0. Spikuleta^s broad as long, aomowliat heart- shaped. 



(lf>. Briza. Tlorets crowded In thospllcelets, almost horizontal; lemmas boat-shaped or ventricose 



6 b. Hpikelots much long'or than broad, not heart-shaped. 



e. Lemmas keeled, 



Tl. Poa. Base of florets often cobwebby. 



(3 c\ Lemmas convex or keeled only nt the summit. 



d. LTppei-most lemmas shaped like the lower, fertile or bterile. 



e. Nerves of lemma protnincnt, parallel. 



78. Glyceria. Spikeleta comprL'ssod-cylindrical or little flattened ; lemmas scarious at summit. 



6 ('. Nerves of lemma not prominent. 



/. Lemmas obtuse, awnless. 



74. Puccinellia. (SIuhk^ much shorter than the lowest lemma; callus not hairy; nerves not 



excurront. ' 



72. Scholochloa. Glumes nearly as long as lowest lemma ; oallus hairy ; one or more nerves of 

 lemma oxourrent. 



//, Lemmas acute, often awned. 



75. Festuca. Lemmas enttro, often awned i\*om tho apex. 



70. Bromus. Lemmas 2-toothed, usually awned just below the apex ; grain adherent to the 



palea, puboacent at the summit. 

 Ofi. Melica. Lemmas awned just bolow the apex, grain A-ee, glabrous. 



d d: Uppermost lemmas broad or cucullato, convolute, forming a club-shaped mass. 

 fiO. Melica. Lemmas subooriaceous with a scarious margin, obtuse. 



Tribe X. H6RDEAE. Bpikolots (l-sovoral-llowered, with uppermost floret imperfect) sessile on 

 opposite sides of a zigzag Jointed channeled rhachls, forming a spike ; glumes sonietime.s abor- 

 tlvo ur wanting, (tl'ten placed together in li-ont of the spikelet; leaf-blades bearing at base a 

 more or less well-marked pair of aurioulate appendages. 



* Spikelets solitary at each joint of t!lie rhaohls. 

 ■J- Spikelets l-IIo^vered, falling attached to joints of the disartioulating rhachls. 



78. Xepturus. Spikelets awnless ; low branching annuals. 



> +■ 4- Spikelets 2-m any-flowered. 



77. Lolium. Spikelets placed with one edge to tlio rhaohis. 



79. Agropyron. Spikelets placed with the side to the rhachls. 



* * Spikelets 2 or 3, rarely solitary, at each joint of the rhachls, placed with the florets dorso- 

 ventral to the rhaohls. 

 -I- Spikelets not all alike. 



80. Hordeum. Spikelets ICrarely '2-3)-nowered, in S's at each Joint, the lateral pair pedlceled, 



usually abortive ; glumes awn-like. 



+• ■*- Spikelets all alike, 2-6-flowered. 



81. Elymus. Glumes usually equaling the florets; spikes mostly dense. 



R2. Hystrix, Glumis reduced to short bristles, one or both often obsolete; spikes very loose. 



Tribe XI. BAMBtfSEAE. Tall woody reeds ; the flat blades with a short petiolo articulated with 

 the sboatli ; spikelets fow-many-flowered, flattened. In panicles or rnciMnes. 

 83. Arundinaria. Lemmas rounded on ti:e back, many-nerved, aiuimlnate or bristle-pointed.- 

 glumes very small, 



