HoLLOWAY. — Studies in the New Zealand Species of Lycopodium. 161 



Art. XX. — Studies in the New Zealand Species of the Genus Lyco- 

 podium : Part HI — The Plasticity of the Sjyecies. 



By the Rev. J. E. Holloway, D.Sc. 



[Read before the Philosophical Insfiiutc of Ca»(erburi/, ISlh December, 191S ; received 

 by Editor, 31st December, 1918 ; issued separately, 'JOth June, 1919.] 



Plates IX-XIV. 



Contents. 



Classification ot the New Zealand Species 



(ieneral 



Species belonging to the Sections Selago and Phlegmaria 



Habit and External Form of Plant, and Nature of Strobilus 

 Stem-anatomy 



Prothallus, Sexual Organs, and the Young Plant . . 

 Species belonging to the Sections Jnvndata and Certiua 

 Section Inundata 



External Form of Plant, and Nature of Strobilus 

 Stem-anatomv 

 The Young Plant 

 Section Cernua 



External Form of Plant, and Nature of Strobilus 

 Stem-anatomv 

 The Prothallus . . 

 The Young Plant 

 Species belonging to the Clavata Section 



Externa] Form of Plant and Nature of Strobilus . . 

 Stem-anatomy 

 The Prothallus 

 The Young Plant 

 Heterophylly 

 The Plagiotropic Habit 

 The "Foot" 

 Summary 

 Postcript 



Page 



161 

 161 

 165 

 165 

 170 

 175 

 177 

 179 

 179 

 179 

 180 

 180 

 181 

 182 

 185 

 189 

 190 

 191 

 194 

 198 

 203 

 20.3 

 204 

 207 

 207 

 215 



Classification of the New Zealand Species. 



Species belonging to the sections Selago and Phlegmaria — 

 Lycopodium Selago Linn. L. Billardieri Spring. 



L. varium R. Br. L. Billardieri var. gracile T. Kirk. 



Species belonging to the sections Inundata and Cernua — 



Lycopodium Drummondii Spring. L. ramulosum T. Kirk. 

 L. laterale R. Br. L. cernuum Linn. 



Species belonging to the section Clavata — 



Lycopodium volubile Forst. L. densum Labill. 



L. fastigiatum R. Br. L. scariosum Forst. 



General. 



Li the present paper I have gathered together all the facts which I 

 have observed with regard to the general biology of the eleven species 

 of Lycopodium which occur in New Zealand. 



The New Zealand biological region provides an excellent field for the 

 observation of the remarkable plasticity of the members of this genus. 

 L. Cockayne (10, pp. 2-3) has pointed out how peculiarly fitted New Zealand 

 6 — ^Trans. 



