GRAMINACEAE 



b. Spikelets in the same Inflorescence 

 I I | Pistillate spikelets below, surroum 

 (2) Pistillate spikelets above, without ivory-liki involucre 

 2. Spikelets all perfect or oJ two kinds, : 

 mentary 



a. Spikelets in different inflorescences, the staminati in tassels, pis) 



the other imperfect and stalked 



b. Spikelets all alike 



(1) Glumes 3-4 



(a) Glumes shorter than the fertile lemma and palet, both I 



and palet indurated in fruit 



(b) Outer glumes enclosing the Lemma and palet, leu i 



durated in fruit; third and fourth glumes small or rud 

 and hair like 



(2) Glumes 2 



(a) Spikelets in one sided spikes 



(b) Spikelets not in one-sided 

 x. Spikelets 1 -flowered 



(x) Glumes small or minute 



(y) Glumes variable, mostly as long or longer than I 

 y. Spikelets 2-many-flowered 



(x) Spikelets sessile on the main zig-zag axis 

 (y) Spikelets more or less stalked, main axis net / , 

 m. Glumes enclosing the spikelet, lemma usuallj i 



back 

 n. Glumes not enclosing the spikelet, lemma awnl< 

 at the top 



(3) Glumes none 

 II. Plants with tall woody stems or canes 



. 





. 



Artificial Key 



I. Spikelets in panicles (Or cylindric spikes) 

 1. Spikelets one-flowered 



a. Three or four empty glumes 





Agrostis 



Agrro 

 vulgaris, panicle 



ind Bpik< 



b. Two empty glumi - 



(1) Flowers naked at base, or with one hairy bristle 



(2) Flowers with two seal- - or Dl Stli 



c. No empty glumes 





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