670 



INDEX 



Nicotiana, tabacum, 597 



tomentosa, 596 



wigandioides, 596 

 Nodding barley, 147 

 Node, 22 

 Nodes, 72 



Non-saccharine sorghums, 196 

 Northern dewberry, 65, 356 



fox grape, 499, 500 

 Nucellus, so, 102 

 Nucleoli, 6 

 Nucleus, 6, 8, 

 Nurse crop, 149 



Oats, 88, 89, 123 

 Abyssinian, 130 

 Algerian, 131 

 animated, 131 

 banner, 130. 



fly> 131 



hull-less, 130 



mane, 130 



Mediterranean, 130 



naked, 130 



panicle, 130 



rough, 131 



short, 130 



side, 130 



single, 126 



sterile, 131 



Tatarian, 130 



twin, 126 



wild, 130 

 Ochrus, 432 

 Ocrea, 284 

 Oil cake, 473 



meal, 473 

 Okra, 527 



Old World plums, 397 

 Oleacese, ssi 

 Olea europooea, 551 

 Oleomargarine, 524 



Olive, SSI 



family, ssi 

 Onion, 231, 240 



common, 232, 237 



Egyptian, 241, i!42 



multiplier, 241, 242 



perennial tree, 243 



potato, 241 



top, 241, 242 



tree, 241, 242 



Welsh, 231, 239 

 Onions, types of, 241 



composition of, 243 



uses of, 244 

 Onobrychis vicisefolia, 46s 

 Ophioglossales, 64 

 Orache, 299 

 Orange, blood, 484 



Calamondin, 487 



common, 484 



king, 48s 



mandarin, 485 



Mediterranean, 484 



navel, 484 



Satsuma, 485 



Seville, 487 



sour, 487 



Spanish, 484 



sweet, 484 



trifoliate, 489 



Unshiu, 48s 

 Organs, 4 



absorptive, 4 



reproductive, 4 

 Ornamental beet, 301 

 Ornithopus sativus, 465 

 Oryza, 81, 87, 88 

 ' glutinosa, 204 



granulata, 206 



o£Scinalis, 206 



sativa, 200, 206 

 utilissima, 206 

 communis, 206 



