978 
I N D E X. 
Spiral vessels, 22, 90, 114, 
116 (Figs. 75, 95). 
Spirillum, 249, 954 (Fig. 
166). 
Spirobacterin, 249. 
Spirochaete, 249. 
Spirogyra, 10, 16, 46, 234, 
258, 946 (Figs. 5, 6, 13, 
170). 
Spirulina, 249. 
Splitting of the cell- wall, 73 
(Figs. 58, 59). 
Spongy parenchyma, 84. 
Spontaneous periodic move- 
ments, 880, 881, 895. 
Sporangium, 388, 402, 414, 
436, 453j 455j 456, 459> 
466, 475, 476, 479, 480 
(Figs. 285, 290, 292, 304, 
305, 319-322, 325, 327, 
334, 335, 337, 338). 
Sporastatia, 323. 
Spore, 223, 228, 382, 404, 
438. 
Spores, Mode of formation 
of, 12 (Figs. 7, 10, 188, 
205, 223, 227, 268-270, 
286, 305, 306, 322, 323, 
337). 
Sporidia, 330, 334 (Fig. 224). 
Sporocarp — 
of Carposporese, 236, 
284 (Figs. 164, 187- 
190, 199, 204, 207, 
208, 218). 
of Rhizocarpeae, 451, 
452,453, 455, 45^,459 
(Figs. 317-321, 325). 
Sporogonium, 226, 342, 350, 
354, 355, 360, 374, 379, 
380, 381 (Figs. 238, 240, 
246, 257, 263-266). 
Sporophore, 225, 343, 387. 
Spur, 570 (Figs. 396, 491). 
Squamariese, 292. 
Stamen, 490, 505, 514, 529, 
54T, 543, 544, 545, 54^ 
(Figs. 344, 347-350, 362- 
366, 490). 
Staminal leaves, 541. 
Staminode, 548. 
Staphisagria, 608. 
Staphylea, 651. 
Staphyleacese, 660. 
Starch, 6, 56, 707, 747. 
Starch-forming corpuscles, 
948. 
Starch grains, 46, 56, 61 
(Figs. 45, 49). 
Staurospermum, 257. 
Stem, 150, 157. 
Stem-tendrils, 217, 865. 
Stephan osphsera, 255 (Fig. 
168). 
Sterculia, 547 (Fig. 371). 
Sterculiaceae, 661. 
Stereocaulon, 319. 
Sterigma, 326. 
Stichococcus, 329. 
Sticta, 320 (Fig. 214). 
Stigeoclonium, 4, 8 (Fig. 3). 
Stigma, 493, 558, 568 (Figs. 
382, 385-387, 390-392, 
395, 491, 492). 
Stigma, of Muscineae, 343, 
373. 
Stigmaria, 485. 
Stigmatic cells, 351. 
Stinging hairs, 100. 
Stipulatse, 390, 410. 
Stipule, 7.12, 215, 640. 
Stipules of Ghara, 295. 
Stolon, 217. 
Stomata, 77, 102, 103, 104, 
105, 106, 678, 949 (Figs. 
84-89). 
Stone, 122, J 25. 
Stone-cells, 84. 
Stone-fruit, 616. 
Stratification of the cell- 
VJ3\\, 19, 27, 946. 
Stratioteae, 631. 
Stratiotes, 952. 
Strawberry, 221, 594, 614. 
Strelitzia, 555. 
Striation of the cell-wall, 
19, 27 (Figs. 28, 30, 32). 
Stroma, 316 (Fig. 209). 
Strontium, 695. 
Strophiole, 618. 
Struggle for existence, 929. 
Struihiopteris, 428, 433, 
435. 
Strychnaceae, 658. 
Strychnos, 587, 949. 
Style, 558, 567 (Figs. 383, 
386, 388-390, 392, 393, 
395, 490- 
Stylidieae, 659. 
Stylogonidium, 239. 
Stypocaulon, 139 (Fig. ro8). 
Styracaceae, 659. 
Suberous change of cell-wall, 
20. 
Subhymenial layer, 310, 323, 
325, 333, 338 (Figs. 7, 205, 
218, 219, 227). 
Successive whorls, 187. 
Succulent tissue, 83. 
Sugar, 708. 
Sulphur, 696, 698. 
Sulphuric acid, 698. 
Sunflower, 7 1, 154, 171 (Figs. 
118, 126). 
Superior gynaeceum, 560. 
Superposed, 189, 601, 645. 
Surface-growth of the cell- 
wall, 21, 946, 
Survival of the Fittest, 941. 
Suspensor, 472, 499, 523, 
588 (Figs. 332, 354, 355, 
399, 400, 402-405). 
Swarm-spore, 4, 12, 240. 
Swartzieae, 662. 
Swelling -up, 35, 6j, 668, 
778. 
Swimming of swarm-spores, 
38. 
Symmetry, 204, 537, 610, 
960. 
Sympetalae, 658. 
Sympetalous, 221, 539. 
Symphoricarpus, 642 (Fig. 
440). 
Symphyllous, 539. 
Symphytum, 577, 598. 
Sympodial inflorescence, 5 97. 
Sympodium, 178, 180. 
Synacmic, 910. 
Synalissia, 327. 
Synandrae, 658. 
Syncarp, 614. 
Synchitrium, 252. 
Synergidae, 580, 959 (Fig. 
399)- 
Synsepalous, 221, 539. 
Syntagma, 664. 
Syringa, 652. 1 
System, Natural, 942. 
Taccaceae, 632. 
Tagma, 664. 
Tamariscineae, 660. 
Tannin, 706. 
Tap-root, 637. 
Tapetum, 388, 437, 491 (Figs. 
305, 322, 337, 374, 377). 
Targioneae, 356. 
Tasmannia, 651. 
Taxineae, 527, 958. 
Taxodineae, 527, 958. 
Taxodium, 510, 517, 527. 
Taxus, 513, 522, 527 (Figs. 
348, 354). 
Tecoma, 137, 654. 
Teeth, 381, 383. 
Teleutospore, 3 30 (Figs. 223, 
224). 
Temperature, Influence of, 
725. 
Tendril, 214, 217, 865, 934, 
936 (Fig. 486). 
Tension — 
- in plants, 787. 
of tissues, 794. 
Terebinthaceae, 93, 660. 
Terebinthineae, 660. 
Terminal branching, 176. 
Ternströmiaceae, 660. 
Testa, 486, 492, 593 (Figs. 
346, 435, 436, 438). 
Tetracyclae, 655, 657. 
