THE TASMANIAN FLORA. 



255 



VI. 



Tii. 



viii. 



is. 



XV. 



xvm. 



XIX. 

 XX. 



Spike several inehes long. Spikeleta closely 



appressed to the rliaohis 

 Spike- short. Spikelets not closely appressed 

 Glumes obtuse ... 

 Glumes acute 

 One glume usually hooked 

 Glumes not hooked ... 

 Glumes dark, the outer one the largest 

 Glumes green, outer ones very small ... 

 Spikelets small, all on one side of the rhachis, 



in a dense spike 

 Spikelets in 2 rows, in a long loose spike 

 Spikelets otherwise 

 Spike dense, all glumes with long scabrous 



awns ... 

 Spikelets usually 2, dispersed, awns long 

 Spikelets numerous, never very densely 



arranged. Awns long, short, or none 

 Creeping on sand. Fertile flowers, in short, 

 stalked, globose heads. Glumes many inches 

 long 

 Head small, on a tall stalk. Glumes miuutely 



awned, g inch long ... 

 Spikelet 1-flowered or with an abortive second 



flower ... 

 Spikelet 2-3-flowered, the empty glumes 

 relatively large and enclosing the flowers .. 

 Spikelet 2-many-flowered, the outer empty 



glumes usually short... 

 Inflorescence of few spikelets, in heads, most 



glumes with long awns 

 Inflorescence cylindrical, the glumes covered 



with long silky hairs ... 

 Spikelets otherwise 



Flowering glume with a dorsal awn or awn- 

 like projection of the glume 

 Flowering glume unawued (some may be 



eL\^ned in Gastridium) 

 Outer glumes also awned 

 Flowering glume with 5 awns... 

 Flowering glumes normal 

 Outer glumes unequal, very short 

 Outer glumes equal, exceeding the flowering 



glume ... 

 Flowering glume closely enveloping, exceeding 



3 lines. Awn much longer .. . 

 Flowering glume under 3 lines. Awn short. . . 

 Flowering glume about 3 lines long, the awn 



inserted close below the apex 

 Flowering glume 5-8 lines long. Awn 



terminal 

 Spikelets flat. Flowers in a dense cylinder ... 

 Spikelets not flat. Inflorescence seldom dense 

 Pale absent 

 Pale present 



Vlll. 



2. Stenataphrum. 

 vii. 



5. Hemarthria. 

 48. Leftunu, 



4. Zoysia. 

 10. Tetrarrhema. 



33. Cynomi"us. 

 47. Lolium. 



49. Hordeum. 



46. Brachypodium. 



45. Agropyrum. 



3. Spinifex. 



.30. Echinopogon. 



xiii. 



XX viii. 



xxxiv. 



7. Anthistiria. 



6. Imperata. 

 xiv. 



8. Polypogon. 

 17. Pentapogon. 



xvi. 



9. MicrolcBTM. 



18. Dichelachne. 



16. Stipa. 



11. Alopecurus. 



XX. 



19. Agrostis. 



20. Deyeuxia 



