250 



BOTANY. 



Saccharomycetes. See " Yeast." 



Sac fungi. See " Ascomycetes." 



Safranine, 233. 



Sage, 215 ; Fig. 120. 



SalicinesB, 183. 



Salix. See " Willow." 



Salvinia, 118. 



Sambucus. See "Elder." 



Sanyuinaria. See " Blood-root." 



Sapindacess, 199. 



Saprolegnia, -acese, 60-62; Fig. 36. 



zoospores, 62. 



resting spores, 62. 



antheridium, 62. 

 Sargassum, 48; Fig. 28. 

 Sarracenia, -acese. See " Pitcher- 

 plant." 



Sassafras, 188. 



Saururus. See " Lizard-tail." 

 Saxifrage, 202. 

 Saxifraginse, 202. 

 Scabiosa. See " Scabious." 

 Scabious, 224. 

 Scalariform, 110. 

 Scale-leaves, 170. 

 Scenedesmus, 24; Fig. 11. 

 Schizomycetes. See " Bacteria." 

 Schizophytes, 12, 14. 

 Schlerenchyma. See "Stony tissue." 

 Schrankia. See " Sensitive-brier." 

 Scilla, 151. 



Scirpus. See " Bulrush." 

 ScitaminesB, 153, 162. 

 Scotch pine, 129-140; Figs. 75-77. 



stems and branches, 129. 



leaves, 129, 130. 



gross anatomy of stem, 130. 



growth-rings, 130. 



roots, 131. 



sporangia, 131. 



cones, 132. 



macrospores and prothallium, 133. 



ripe cone and seeds, 133. 



germination, 134. 



young plant, 134. 



Scotch pine (Continued), 

 histology of leaf, 135. 

 of stem, 136-138. 

 of root, 138. 

 microsporangium and pollen 



spores, 138, 139. 

 archegonium, 140. 

 fertilization, 140. 

 Scouring-rush, 122. 



Scrophularia, -ineas. See " Fig-wort." 

 Sea-lettuce, 26; Fig. 15. 

 Sea-rosemary, 212. 

 Sea-weed (brown). See " Brown 



(red). See " Red algae." 

 Sedge, 161 ; Fig. 87. 

 Scdum. See " Stone-crop." 

 Seed, 128, 133, 145, 150. 

 Seed-plant. See " Spermaphyte." 

 Selaginella, -ex. See "Smaller club- 

 moss." 



Sensitive-brier, 209 ; Fig. 115. 

 Sensitive-plant, 209. 

 Sepal, 148, 150, 174, 179. 

 Sequoia. See " Red-wood." 

 Sessile leaf, 170. 

 Shepherdia, 206. 



Shepherd' s-purse, 173-180; Figs. 93-95. 

 gross anatomy of stem, 173. 

 leaf, 124, 173. 

 root, 173. 

 branches, 174. 

 flower, 174, 175. 

 fruit and seed, 175. 

 histology of root, 175, 176. 

 stem, 177. 

 leaf, 177, 178. 



development of flower, 179. 

 ovule, 179. 

 embryo, 180. 



Shooting-star, 212 ; Fig. 117. 

 Sieve-tube, 111, 137. 

 Silene. See " Catch-fly." 

 Silicon, 2. 

 Simple leaf, 170. 



