INDEX 



RACHIS: the central axis of 

 an inflorescence, which 

 bears branches or spike- 

 lets. 5 



Rattlesnake chess 63 



Kottlesnake manna 55 



Ravenna grass 178 



Red fescue 73 



Red sprangletop 132 



Redfieldia 28 

 flexuosa 28 



Redtop 1 17 



Reed 24 



Reed canary grass 144 



Rescue gross 59 



RHIZOME: a stem which 

 grows beneath the surface 

 of the ground. 3, Fig. 376 



Sedge Family 2 



Sedges 2 



SESSILE: seated directly on 

 the axis; lacking a pedi- 

 cel. 6, Fig. 377 



Figure 376 



Rhode Island bent 1 16 

 Rhodes gross 140 

 Rhynchelytrum 154 



roseum 1 54 

 Rice 146 

 Ringgross 125 

 Rip-aut gross 69 

 Roots 3 



Rough stalk bluegross 79 

 Ruby gross 154 

 Rush Family 2 

 Rushes 2 

 Rye 86 

 Ryegrass 86 



Socoton 129 

 Sacchorum 178 



officinarum 178 

 Sacciolepis 163 



striata 163 

 Sock gross 163 

 St. Augustine gross 149 

 Salt grass 25 

 Salt-marsh gross 136 

 Sand bluestem 181 

 Sand dropseed 1 28 

 Sand iovegross 37 

 Sand reedgross 1 1 5 

 Satintail 176 

 Schedonnordus 136 



panicuiotus 136 

 Schizochne 46 



purpuroscens 46 

 Scholochloa 46 



festucoceo 46 

 Scleropogon 17, 26 



brevifolius 17, 26 

 Scrotchgross 121 

 Sea oats 43 

 Secole 86 



cereole 86 



Figure 377 



Setoria 151 



foberii 152 



genicuioto 151 



glauca 151 



italico 152 



lutescens 151 



mocrostochyo 1 54 



magna 153 



verticilioto 151 



viridis 153 

 SHEATH: the tubular, usual- 

 ly split portion of a grass 



leaf, which surrounds the 



stem. 4, Fig. 378 



Sleepy grass 1 1 1 



Slough grass 135, 137 



Smilo gross 109 



Smooth brome 61 



Smooth crabgross 158 



Sorghostrum 182 

 nutans 182 



Sorghum 183 

 holepense 183 

 sudonense 183 

 vulgare 183 



Southern wild rice 148 



Spartina 136 

 olternifloro 137 

 cynosuroides 137 

 gracilis 136 

 patens 136 

 pectinoto 137 

 townsendii 137 



Spelt 87 



Sphenopholis 100 

 intermedia 100 

 nitido 100 

 obtusoto 100 



SPIKE: on unbronched inflor- 

 escence, with spikelets at- 

 tached directly to the axis. 

 The spikelets may be on 

 one side or both sides of 

 the rochis. 5, Fig. 379 



Figure 378 



Sheep fescue 74 

 Side-oots grama 141 

 Silver beordgross 182 

 Silver hoirgross 97 

 Silver plumegrass 177 

 Sitonion 92 



hystrix 92 



jubatum 92 

 Six-weeks fescue 70 

 Six-weeks grama 143 

 Six-weeks grasses 70, 143 

 Skyline bluegrass 84 



Figure 379 



Spike fescue 71 



Spike muhly 124 



Spike redtop 1 18 



Spike Trisetum 98 



SPIKELET: the smallest 

 bronchlet of a gross inflor- 

 escence, typically consis- 

 ting of glumes, rachilla, 

 and florets. 5 



Spikelets 5 



Sporobolus 126 

 oiroides 128 

 asper 1 27 

 clondestinus 127 

 cryptandrus 128 

 gigonteus 128 

 heterolepis 127 

 macer 1 27 

 neglectus 126 

 voginoeflorus 126 

 wrightii 129 



Squirreltail 92 



STAMEN: the pollen-produc- 

 ing organ of a flower. 5 



Stems 3 



Stenotophrum 1 49 

 secundatum 149 



191 



