GENERAL INDEX. 



605 



Silk Tree, 547 



Silphium, 70, 71, 103, 133, 156, 



159, 515 

 Silver-Bell Tree, 505 

 Silver Fir, 413 

 Silver Poplar, 173 

 Silver Tree, 491 

 Simaruba, 540 

 Simaruba Bark, 540 

 Simarubacese, 540 

 Simple Leaf, 147 

 Simple Pistil, 433 

 Simultaneous Division, 49 

 Single Cells, 65 

 Siplionacese, 339 

 SipUonese, 340 

 Sirurella, 331 

 Sirurelleae, 331 

 Sisymbrium, 98 

 Size of Cells, 16 

 Size of Leaves, 146 

 Skimmia, 548 

 Skunk Cabbage, 463 

 Sleep of Plants, 198 

 Slime Moulds, 6, 170, 188, 307 

 Slippery Elm, 488 

 Sloanea, 545 

 Slough Grass, 455 

 Sinartweed, 497 

 Smilacina, 438 

 Smilax, 459, 460 

 Smut, 318, 333 

 Snakewood, 490 

 Snapdraifon, 500 

 Sneeze wood Tree, 535 

 Snowball, 518 

 Snovvberries, 518 

 Snowdrop, 468 

 Snowdrop Tree, 505 

 Snow flake, 468 

 Snow Plant, 511 

 Soap Bark, 539 

 Soda Salts, 176 

 Sodium, 175 

 Soft Bast, 116 

 Solanacese, 71, 425, 500 

 Solan urn, 11, 103, 500 

 Solidago, 516 



Solitary Axillary Inflorescence, 428 

 Solitary Spores, 319 

 Solitary Terminal Inflorescence, 



429 

 Sollya, 551 

 Soloiipa, 309 



Solutions, 174 



Souneratia, 533 



Sopbora, 533 



Soredia, 305 



Sorghum, 457 



Sorisporiuni, 319 



Sorrel, 497, 542 



Sorosis, 437 



Sorus (pi — sori), 313, 374 



Sour Gum, 519 



Sour Sop, 501 



Soy, 532 



Spadix, 428 



Spanish Bayonet, 461 



Spanish Chestnut, 478 



Spanish Needles, 515 



Sparganium, 462 



Speerschneidera, 309 



Sperjrula, 550 



Spermagonium (pi. — a), 393, 398, 



313 

 Spermatium(pl.— a),293, 399, 312, 



315, 323, 330 

 Spermatozoids, 45 46, 243, 367 



271, 330, 333,341, 363 

 Sperm Cells, 341, 363. 

 SphacelariacesB, 339 

 Si.)hacelia, 289 

 Sphieria, 293, 394, 295 

 Sphseriaceae, 339 

 Sphserobacteria, 213 

 SpUaerococcacesB, 339 

 Sphserococcites, 278 

 Sphaerococcoidese, 277, 278 

 Sphasrophorei, 310 

 Spliserophorus, 301, 310 

 Sphasropiea, 245, 247 

 Sphseropleaceae, 339 

 Sphserotheca, 281,383 

 Sphagnacese, 353, 355, 356, 357 

 Sphagnum, 351, 357, 358 

 Sphenophyllum, 368 

 Spheroidal cell, 19 

 Spicules, 334 

 Spiderwort, 457 

 Spike, 395, 438 

 Spinach, 495 

 Spinacia, 495 

 Spines, 136 

 Spiraea, 539 

 Spirseese, 539 

 Spirals, 38 



Spiral Vessels, 88, 85, 108, 363 

 Spirantlies, 47Q 



