94 KANSAS ACADEMY OF SCIENCE. 



42. P. intermedia Bosc. ; Southern Reed-Canary grass, California Timothy. 



43. P. arundinacea L.; Reed-Canary grass. 



11. Anthoxanthum L. 

 a. Cuhus slender; very sweet-scented in drying 44 



44. Anthoxanthum odoratum L.; Sweet Vernal grass. 



12. Akistida L. 



a. Awns separate to the base, not jointed with the glume (b). 



a. Awns jointed with the glume below their junction 50 



b. Awns very unequal, the elongated middle one bent (c). 



b. Awns all diverging and alike, or lateral ones but little shorter (e). 



c. Outer glumes 9-10 lines long, 3-5-nerved 45 



c. Outer glumes 3-4 lines long, carinately 1-nerved {d). 



d. Lateral awns C-7 lines long, middle one 10-12 lines 47 



d. Awns much shorter: culms much branched throughout 46 



e. Panicle spiked, 10-18 inches long (/). 



e. Panicle loosely few-flowered, at most (i inches long (g). 



f. Awns much longer than the flower, middle one about one inch 52 



/. Awns about the length of the flower, li lines or shorter 48 



g. Stems simple, 6-15 inches high, panicle 3-G inches long, awns long or short, outer glumes 



purplish 49 



g. Stems tufted, low, awns capillary exceeding the slender flower, 1^3 inches long 51 



45. Aristida ramosissima "Englm.; Triple-awned grass. 



46. A. dichotoma Mx.; Beard grass, Three-awned grass. 



47. A. gracilis Ell.; Beard grass, Three-awned grass. 



48. A. str-icta Mx.; Beard grass, Three-awned grass. 



49. A. purpurea Nutt.; Beard grass, Three-awned grass. 



50. A. desmantha Trin. ; Beard grass, Three-awned grass. 



51. A. oliyantha Mx.; Beard grass. Three awned grass. 



52. A. 23ur2^urascens Poir.; TaU Beard grass, Triple-awned grass. 



13. Stipa L. 



a. Awns 4-7 inches long, panicle more or less contracted (6). 



a. Awns 2-3 inches long, panicle open 53 



a. Awns l-H inches long, panicle narrow, loose, long 55i 



6. Panicle loose, 8-12 inches long 54 



6. Panicle narrow and contracted, base of grain more pointed 55 



53. Stipa aveyiacea L.; Black Oat grass. 



54. S. comata Trin. &, Rupr.; Porcupine grass, Feather grass. 



55. S. spartea Trin.; Porcupine grass. Feather grass. 

 55i. -S. Viridula Trin.; Bunch Grass, Porcupine grass. 



14. Obyzopsis Mx. 

 a. Awn thrice the length of the blackish flowering glume 56 



56. Oryzopsis melanocarpa Muhl.; Mountain rice. 



15. Muhlenbeegia Schreb. 



a. Panicles contracted or glomerate (6). 



a. Panicles very loose and open, the long branches capillary G4 



h. Flowering glumes barely mucronate or sharp-pointed (c). 

 6. Flowering glumes bristle-awned from the tip (e). 



c. Outer glumes awnless but pointed (rf). 



c. Outer glumes awned, panicle oblong-linear, spike-like 58 



d. Culms rarely branching, 1-2 ft. high, panicle simple, very slender 57 



d. Culms much branched, 2-3 ft. high, panicles lateral and terminal, linear 59 



e. Floret with an oblique callus bearing hairs as long as the floret 61 



e. Not as above (/). 



