GLOSSARY AND GENERAL INDEX TO VOL. II. 531 



Retinacula. Glandular bodies at the 

 bases of the pollinia in some Orchids 



Rhamuase, 456 



Rhizophores, 161 



Rhythm, 509 



— artificial, 511 



Root-hairs, action of, 417 



Root-parasitism, 440 



Root-pi-essure, 418, 425 



llostdlum. A peculiar projection into 

 the flower of some Orchids. It is 

 formed by a modification of one of the 

 stigmas 



Saprophytes. Plants which grow on 

 decaying organic matter, from which 

 they derive their nourishment, 66 



Sarcocarp. The fleshy middle layer of 

 the drupe 



Schizostely. A condition in which an 

 axis has several steles, eacli of which is 

 composed of only one vascular bundle, 

 151 



Sclerotia, 73. 86 



Secondary growth in thickness in Thal- 

 lophytes, 31, 35, 36, 43, 46 



— in Isoetes, 123, 164, 165 



Ferns, 123, 140 



Secretion, 461 



Seed, structure of, 177 



Self-sterility, 521 



SepticidaJ. Splitting down the ventral 

 sutures. Applied to the dehiscence of 

 capsular fruits 



Septifragal. A tei-m applied to the mode 

 of dehiscence of capsules in which the 

 pericarp becomes detached and leaves 

 the seeds adhering to a central column 

 formed by the axile placentas 



Series, 6 



Sexual reproduction, 514 



Shields, 63 



Sleep movements, 489 



Soredia, 97 



Sorus. A collection of sporangia 



Species, 2 



— derivation of names of, 8 

 SpeiTuatium, 50, 70, 83 

 Spermatozoid = antherozoid 

 Spermogonium, 70, 83 

 Sphacelia, 86 

 Sporidium, 88 



Sporopfiore. The part of the sporophyte 

 which bears the sporophylls. Usually 

 apphed to the iufloresceuce of Phane- 

 rogams 



Sporophylls. Leaves which bear spo- 

 rangia, 



Sporophyte. The phase of the plant 

 which is charaeteriseil by the produc- 

 tion of spores, and cannot prodiice 

 sexual cells 



Sports, 3 



Starch grains, formation of, 449 



Stele. A strand of tissue in which are 

 embedded one or more vascidar bun- 



dles, and which is suiTOunded by an 

 eudodermis 



Stereome. The supporting tissue of the 

 plant. It includes the vascular bun- 

 dles and the sclerenchyma and collen- 

 chj-ma 



Sterigma, 70, 83 



Stipes, 91 



Stipules. Branches of the hypopodium 

 or leaf-base 



Stoma of Marchantia, 105 



Stomata, action of, 429 



Slomium. The cells of the annulus of 

 the fern which rupture to allow of the 

 escape of the spores, 134 



Stromata, 87 



Strophioles. Small protuberances grow- 

 ing from various regions of the testa 

 of the seed. They are never developed 

 before fertilisation 



Stylogonidia, 71 



StylopoiUiim. The epigynous disc found 

 in the flowers of the tlmbelliferaj 



Sub-classes, 6 



Suspensor, 124, 155, 176, 184 



Symbiosis. A term employed to denote 

 the living together of two plants to 

 their mutual advantage. The best 

 example is afforded by tlie Lichens, 

 110,144 



Synangium, 122, 142, 158 



Suncarpous. Having the carpels coher- 

 ing together to form a compound ovary 



Synergidae, 183 



Si'ugenesious. A term applied to sta- 

 mens whose anthers are united to- 

 gether, while their filaments are free 



Systems of classification, 16, 17 



Tapetiim. A nutritive layer usually 

 surrounding the sporogenous tissue of 

 the archesporium 



Teleutospore or teleutogonidium, 71, 83 



Tendrils, 496 



Tensions in plants, 476 



Tetrudynamous. A term applied to the 

 arrangement of the stamens in the 

 Cruciferae 



Tetraspores or Tetragonidia. The asexual 

 reproductive cells of the Rhodophyceae 



Thallose liverworts, 104 



Thallus. A plant body showing no dif- 

 ferentiation into stem, leaf and root 



TJiyloses. A tissue often found in the 

 interior of vessels or tracheids. It is 

 formed by a cell of the adjacent tissue 

 boring its way into the vessel through 

 a pit and then multiplying by cell- 

 division 



Trama, 91 



Transfusion tissue. A tissue surrounding 

 the vascular bundles in the mei'isteles 

 of the leaves of the Conifer* 



Transpiration, 419, 425, 427 



— conditions of, 429 



— importance of, 430 



— current, 442 



M :m 2 



