270 



INDEX AND GLOSSARY 



Setulose. Having minute bristles. 



Sexual reproduction. 1S3. 



Sheath. A tubular envelope, as the lower 

 part of the leaf in Grasses. 



Sheathing. Inclosing as by a sheath. 



Shoot, U ; metamorphosed (§§ 87-99), 58. 



Shrub. A woody perennial, smaller than a 

 tree. 



Sieve tubes, 238. 



Silicle. A short silique. 



Silique. |,The peculiar pod of Cruciferae. 



Silky. Covered with close-pressed, soft, and 

 straight pubescence. 



Simple. Of one piece ; not compound. 



Sinuate. With the outline of the margin 

 strongly wavy. 95. 



Sinus. The cleft or recess between two 

 lobes. 80. 



"Sleep of Plants," TO. 



Sleep movements, 75; of leaf (Exp. IS), 68. 



Smooth. Without roughness or pubescence. 



Sorus (pi. Sori). A heaj) or cluster, applied 

 to the fruit dots of Ferns. 205. 



Spadix. A spike with a fleshy axis. 126, 

 141. 



Spathe. A large bract or pair of bracts in- 

 closing an inflorescence. 126. 



Spatulate. Gradually narrowed downward 

 from a rounded summit. 93. 



Spermatophytes, 14. 



Spicate. Arranged in or resembling a spike. 



Spiciform. Spikelike. 



Spike. A form of simple inflorescence with 

 the flowers sessile or nearly so upon a more 

 or less elongated common axis. 141. 



Spikelet. A small or secondarj^ spike. 



Spine. A sharp woody or rigid outgrowth 

 from the stem. 



Spinose. SpineKke, or having spines. 



Spirogyra, 157, 173. 



Spongy pai-enchyma, 227. 



Sporangium. A spore case. 205. 



Spores, 181, 182, 187, 191, 201, 205. 



Sporidia, 194. 



Sporocarp. The fruit cases of certain Cryp- 

 togams containing sporangia or spores. 



Sporogonium, 201. 



Sporophylls, 212. 



Sporophyte, 207. 



Spur. A hoUow saclike or tubular extension 

 of some part of a blossom, usually nectar- 

 iferous. 



Squamula. A reduced scale, as the hypogy- 

 nous scales in Grasses. 



Squarrose. Having spreading and project- 

 ing processes, such as the tips of involucral 

 scales. 



Squarrulose. Diminutively squarrose. 



Stability of plant body, 230. 



Stamen. One of the pollen-bearing or fer- 

 tilizing organs of the flower. 108. 



Stamens, study of. 100. 



Staminate (flower). Possessing stamens and 

 no pistil. 123. 



Staminodium. A sterile stamen, or any 



structure without anther corresponding to 

 a stamen. 



Standard. The upper dilated petal of a pa- 

 pilionaceous corolla. 



Starch, 216; formation (Exp. 11), 66; in 

 seeds, 19 ; observation, in laboratory, 250 ; 

 test, 9. 



Stellate, Stelliform. Star-shaped. 



Stem, 51 ; anatomy, 223 ; ascent of sap (Exp. 

 8), 49 ; characteristic features, 46 ; endog- 

 enous, 223 ; exogenous, 223 ; geotropism 

 (Exp. 9), 49 ; growth in, 48 ; heliotropism, 

 49 (note) ; internal structure, 46 ; labora- 

 tory studies, 45. 



"Stemless" plants, 56. 



Stems, as foliage, 01 ; creeping, 57 ; for prop- 

 agation, 58 ; growth of, 52 ; twining, 

 53. 



Sterile. Unproductive, as a flower without 

 pistil, or stamen without an anther. 



Stigma, 104, 107. 



Stigmatic. Belonging to or characteristic of 

 the stigma. 



Stimulus, 240. 



Stipe. The stalklike support of a pistil ; 

 the leaf stalk of a Fern ; the stalk of a Toad- 

 stool. 194. 



Stipitate. Having a stipe. 



Stipular. Belonging to stipules. 



Stipulate. Having stipules. 



Stipules, 73; as thorns, 73; of Acacias, 73; 

 of the Pea, 69. 



Stolon. A runner, or any basal branch that 

 is disposed to root. 58. 



Stoloniferous. Producing stolons. 



Stomates, 199, 228 ; action, 233. 



Storage, 236 ; in leaves, 70. 



Striate. Marked with fine longitudinal lines 

 or ridges. 



Strict. Very straight and upright. 



Strigose. Besetwith appressed sharp straight 

 and stifi" hairs. 



StrobUe. An inflorescence marked by im- 

 bricated bracts or scales, as in the Hop and 

 the Pine cone. 



Strophiole. An appendage at the hilum of 

 certain seeds. 



Style, 104. 



Stylopodium. A disklike expansion at the 

 base of a style, as in Umbelliferje. 



Sub-. A Latin prefix, usually signifying 

 somewhat or slightly. 



Subulate. Awl-shaped. 



Succulent. Juicy, fleshy. 



Suffrutescent. Slightly or obscurely shrubby. 



Sulfruticose. Very low and woody ; diminu- 

 tively shrubby. 



Sugar, in seeds, 19. 



Sulcate. Grooved or furrowed. 



Sundew, 86. 



Superior (ovary). Free from the calyx, 130. 



Suspended (ovule). Hanging from the apex 

 of the cell. 



Suture. A line of dehiscence. 



Syconium, 151. 



