CURRENT LITERATURE 189 



Encalypta ciliata, var. sub-ciliata, Warnst. By H. N. 

 Dixon {/ourn. Bot. 1909, p. 109), gathered by G. Stabler in 

 Aberdeenshire " in the eighties." 



HiERACIUM SILVATICUM, GOUAN, VAR. TRICOLOR, W. R. LiNTON, 



IN Banffshire. By Ed. S. Marshall {Journ. Bot. 1909, p. no), 

 from limestone rocks near Tomintoul. 



Obituary of Sir George King, F.R.S., with portrait {Joiirn. 

 Bot. 1909, pp. 120-122). 



Obituary of Alexander Whyte, F.L.S. {Journ. Bot. 1909, 

 P- 155)- 



Euphrasia minima. By W. P. Hiern {Journ. Bot. 1909, pp. 

 165-172), found in England on Exmoor as a yellow-flowered plant. 

 The relations between E. minima.^ E. scottica^ and E. foulaensis are 

 not discussed. 



Notes on the Trap-Flora of Renfrewshire. By G. F. 

 Scott-Elliott {Attn, of Andersonian Nat. Soc. iii. Glasgow, 1907). 

 The trap is porphyritic of O.R.S. age. Sequence of vegetation 

 is: — (i) Lichen stage, crustaceous {Lecidea^ Lecanora, etc.), and 

 foliaceous {Parmelia, Cladonia, etc.). (2) Moss stage, Bhacomitriunij 

 etc., and lichens, in tufts, forming a soil and protecting the rock. (3) 

 Vaccinium stage, the soil is tenanted by Vacciniiim, Calhma^ heath 

 grasses, etc., living in crannies or in the humus. In wet situations 

 sphagnum accumulates, and Eriophoruni^ Scirpus ccespttosus, etc., 

 occupy the surface. In dry situations (3) is followed by (4) Herbaceous 

 stage, on disintegrating rock with rapid drainage, with Scadiosa, 

 Thymus^ Campanula rotu?idifoIta, Teucrunn, Viola^ etc. (5) Ulex 

 stage, Ulex^ Cytisus, Pteris, etc., dominant. (6) Rosaceous stage, 

 shrubby and arboreal Rosaceae replace Ulex, etc. This stage is 

 followed by trees of oak, etc. 



Le Plancton des lacs ecossais. By H. Bachmann {Arch. 

 des sc. phys. et nat. Ge?ieve, xx. 1906, pp. 359-361). Relates to 

 nine lochs, of which (except Loch Leven) the plankton was 

 examined living. Always present were Cryptomonas, Mallomonas, 

 and Chlamydomonas, all very frequent in the Swiss lakes also. The 

 organisms dominant in the Scotch lochs were : — Leven, Asterio?iella 

 gracillima ; Earn, Clathrocystis, sp. ; Lochy, Tabellaria fe?iestrata, 

 var. asterionelloides ; Oich, Ceratium hirundi?iella ; Ness, Asterionella 

 gracillhna; \j3.n2ig'!m,Uroglenavolvox', Morar, Staurastrum\ Lomond, 

 Clathrocystis, sp. The lochs that communicate with one another 

 retain their characteristics, as do the Swiss. The author notes the 

 numerous Epiphytes in the plankton and the constant presence of 

 two species of Bacteria on the colonies of Clathrocystis. 



