102 



Bulletin V. 2. 



Fig. 72. Avena sativa, L. — Oats. A, a portion of the inflorescence 

 which is a simple, open panicle. B, a spikelet, two-flowered, with 

 a sterile rudiment terminating the rachilla. C, one of the broad, 

 lanceolate empty glumes. B, a flowering glume; this bears an awn 

 on the back just below the two-toothed apex. /, pistil; the ovary 

 of which is very hairy. G, lodicules. 



ALPHABETICAL LIST OF TERMS. 



The numbers refer to the foregoing Figures. 



Anthers, 31. 



versatile, 45. 

 Cespitose, 64. 

 Ciliate, 48, 54. 

 Ciliate (glumes), 43 47, 48. 

 Digitate, 56. 

 Embryo, 30. 

 Filaments, 31. 

 Floret, 29, 31, 55. 

 Flowers: 



hermaphrodite, t,6. 



pistillate — with pistils only 



Flowers (co7itt?iued) 



staminate — with stamens 

 only. 



unisexual, 2>S' 

 Glumes: 



awned, 45, 50, 68. 



awnless, 50. 



ciliate, 47, 48. 



empty, 36, t,^, 42. 



flowering, 42, 48, 51. 



mucronate, 67. 



nerved, 30. 



