xxii GLOSSARY 



Rhagadiose, deeply chinked, 74 ; cf. rimose. 

 Rhizina, attaching "rootlet," 92-94. 

 Rimose, Rimulose, cleft or chinked into areolae, 73. 

 Rimose-diffract, widely cracked or chinked, 74. 



Scutellate, shaped like a platter, 156. 



Scyphus, cup-like dilatation of the podetium, iii, 117. 



Signature, a term in ancient medicine to signify the resemblance of a plant to any part 



of the human body, 406, 409. 

 Soralium, group of soredia surrounded by a definite margin, 144. 

 Soredium, minute separable particle arising from the gonidial tissue of the thallus, and 



consisting of algae and hyphae, 141. 

 Spermatium, spore-like body borne in the spermogonium, regarded as a non-motile male 



cell or as a pycnidiospore, 201. 

 Spermogonium, roundish closed receptacle containing spermatia, 192. 

 Sphaeroid-cell, swollen hyphal cell, containing fat globules, 215. 

 Squamule, a small thalline lobe or scale, 74 et passim. 

 Sterigma, Nylander's term for the spermatiophore, 197. 

 Stratose thallus, where the tissues are in horizontal layers, 70. 

 Stratum, a layer of tissue in the thallus, 70. 

 Symbiont, one of two dissimilar organisms living together, 32. 

 S3nnbiosis, a living together of dissimilar organisms, also termed commensalism, 31, 32 



et seq. 



Tegulicolous, living on tiles, 369. 



Terebrator, boring apparatus, term used by Lindau for the lichen " trichogyne," 179. 



Thalline margin, an apothecial margin formed of and usually coloured like the thallus ; 



cf. amphithecium. 

 Thallus, vegetative body or soma of the lichen plant, 1 1, 421. Endogenous thallus in which 



the alga predominates, 68. Exogenous thallus in which the fungus predominates, 69. 

 Theca, enlarged cell containing spores ; cf. ascus. 

 Thecium, layer of tissue in the apothecium consisting of asci and paraphyses ; cf. 



hymenium, 157. 

 Trichogyne, prolongation of the egg-cell in Florideae which acts as a receptive tube ; 



septate hypha in lichens arising from the ascogonium, 160, 177-181, 273. 



Woronin's hypha, a coiled hypha occurring in the centre of the fruit primordium, 1 59, 163. 



ERRATA 



p. 24. For Baranetsky read Baranetzky. 



p. 277. For Ascoliu?n read Acolium. 



p. 318. For Lepolkhen coccophora read coccofhorus. 



