SHOKT NOTES. 219 



our British species tliis is satisfactory in every case but one, viz., 

 PlatiinthL'ra chlorantha Curt. [Orclm bifolia Richard), O. virescens 

 Gaud., O. ochroleuca Ten., P. Wankelii Rchb. f., P. montana Rchb. f., 

 Habenaria chlorantha Babington. Unfortunately the last stands for 

 a Mauritius plant with really green flowers, described by Sprengel 

 (Syst. Veget. iii. p. 691), so a new name must be imposed; and I 

 propose that of Habenaria chloroleuca for the plant, which describes 

 the actual colour of the flowers more satisfactorily than clilurantha. 

 The remaining British plants now included in the genera are — 

 H. bifolia R. Br. = P. solstitiaiis Bnngh. ; H. conopsea = Gijvina- 

 denia conopsea R. Br. ; H. albida R. Br. = Gymnadenia albida Rich, 

 Peristylus albidus Lindl., Leucorchis albidics Mey. ; H. viridis R. Br. 

 = Cceloglossum viride Hartm., Platanthera viridis Ldl. ; H. intacta 

 Benth. = TincBa cylindracea Biv., Satyrium maculatum Desf., Orchis 

 intacta Lk., Aceras densijiora Boiss., A, intacta Rchb. f., Neotinea 

 intacta Rchb. f., Himantoglossum secundiflorum Rchb. f. 



SHORT NOTES. 



Note on the Algo-Lichen Hypothesis. — In addition to the 

 various direct and indirect arguments which have been adduced 

 against this theory, another, and in some respects a still more 

 convincing proof, has quite recently been brought under notice by 

 Dr. Nylander in 'Flora' (1885, p. 313). In his observations upon 

 Gyalecta Lamprospora Nyl., a new species from North America 

 collected by Mr. Willey, of which a full diagnosis is given, he 

 writes : — •" Each gonidium of this Gyalecta is distinctly seen to 

 emit from its thickish cellular wall (as do also the young gonidia) 

 a firm medullary filament, and often two such filaments, charac- 

 teristic of the nature of lichens. It is most manifest that these 

 licheno-hyphae are productions, and indeed continuations, of the 

 cellular wall of the gonidium itself." In the species under notice 

 it may be mentioned that the thallus is not corticated, and that the 

 gonidia are most frequently chroolepoidly seriated and moderate. 

 Now this very important discovery of the veteran and distinguished 

 Hellenist is, beyond all question, sufficient of itself at once to dis- 

 prove Schwendenerism in all its phases. For if the gonidia thus 

 send forth filaments in the manner stated, then the gonidia clearly 

 cannot be algals ; and if licheno-hyphae are thus produced by the 

 gonidia, then these hyphae as clearly cannot be parasitic fungal 

 mycelia. On these grounds alone (apart from other considerations) 

 this plausible hypothesis necessarily collapses, and "symbiosis" is 

 seen to be but a mere fable. — J. M. Crombie. 



ScHCENUs FERRUGiNEUs L. IN Britain. — As it is Hot imposslble 

 that, if looked for, the plant may be found elsewhere in Britain, it 

 seems desirable to lose no time in recording the occurrence of 

 Schamus ferruijineus L. in Perthshire. The specimens before me 

 were collected beside Loch Tummel, in July last, by my friend Mr. 

 Brebuer ; but it is only now that, in beginning an examination of 



