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, 1 56. 



Scyphus, cup-like dilatation of the podetium, m, 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. 

 Symbiosis, 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 , 42 1 . 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, 159, 163. 



ERRATA 



p. 24. For Baranetsky read Baranetzky. 



p. 277. For Ascolium read Acolium. 



p. 318. For Lepolichen coccophora read coccophorus. 



