INDEX 



489 



{ywmhers 

 Spanish moss, 410. 

 Spathe, 169. 

 Spatulate, 118. 

 Spawn, 349, 359. 

 Specialization, 225. 

 Species, 425. 

 Specimens, making, 437. 

 Speedwell, 96. 

 Spermatophyte, 310, 352. 

 Spike, 165, 189. 

 Spikelet, 228, 233. 

 Spines on seeds, 338. 

 Splreas, shoots of, 11. 

 Spore, 342, 345, 346. 

 Sporangium, 342. 

 Spore-case, 342. 

 Spore-print, 349. 

 Spring, coming of, 414. 

 Spruce, leaves, 107, 118, 125. 

 Spruces, catkins, 306. 

 Spurge, 218. 

 Spurs, 25. 

 Squash, family, 209, 295; flower, 152, 



163, 184; fruit, 295; germination 



316. 

 Squirrel-corn, 89; flower, 214. 

 Squirrel in knot-hole, 23. 

 Stag's-horn fern, 410. 

 Stamen, 134. 

 Staminate, 139. 

 Staminodium, 202. 

 Standard, 207. 

 Stature of plants, 388. 

 Sterculia, carpels, 202. 

 Sterile flowers, 139. 

 Stick-tights, 180, 253, 280, 337. 

 Stigma, 133. 

 Stipel, 85. 

 Stipules, 80. 

 Stock, fruit of, 262. 

 Stolon, 368. 

 Stone-fruit, 257. 



refer to pages.) 



Stipe, 342, 347. 



St. John's-wort fruit, 265. 



Strawberry, fruit, 253, 274, 305; hull 

 of, 153, 155; inflorescence, 197; phe- 

 nology, 417; runner, 368; sex of, 

 163; stamen, 150. 



Strawberry tomato, fruit, 279. 



Struggle for existence, 15, 381, 410. 



Style, 133. 



Sucker, 11, 370. 



Suffrutesoent, 393. 



Suffrutlcose, 393. 



Sugar cane, 230. 



Sumac, 13; leaf -scar, 40; poison, 88, 

 . 414 ; stature, 389. 



Sunflower, 179, 182, 183; phyllotaxy, 

 68; receptacle, 305. 



Superior ovary, 151. 



Supernumerary buds, 39. 



Suture, 261. 



Swallows, 171. 



Sweet pea, flower, 207, 240; seed of, 

 335. 



Sweet potato, 363 ; and dodder, 407 



Sycamore, 40, 161. 



Syconium, 305. 



Symmetrical flowers, 185. 



Synanthous, 170. 



Synoarpous, 251. 



Syringa. 417. 



Tamarack, leaves, 107. 

 Tansy, 183. 

 Tap-root, 393. 

 Tartarian honeysuckle, 39. 

 Tassels of corn, 166. 

 Teachers, suggestions for, 445. 

 Teasel, 181 ; duration of, 386. 

 Tendrils, 398; on leaves, 97, 108. 

 Tension, plants live under, 382. 

 Teratology, 199. 

 Terminology, 95. 



