THF. VEGETATION OF 1 HE JUAN FERNANDEZ ISLANDS 



945 



The Alpine f e r n - g r a s s li e a t h . 



As a suitable boundary between a Subalpine and Alpine belt the iioo m 

 line was suggested; this is where an assemblage of species belonging to what I 

 have called the Magellanian element makes its appearance: Acaena masa/uerana, 

 Galiiwi ffiasafucnruuDi, GleicheJiia quadripartita, LagcnopJiora Harioti, Luzula ma- 

 safncrana, Myrteola )iuini)iii/aria, Rubus geoides, Uncinia hrevicaulis and phleoides. 

 Some are occasionally found in a lower altitude; thus, the lowest record is 

 550 m for Euphrasia formosissima (which does not belong to the Magellanian 

 group), 750 m for Lycopodium scariosum, 830 m for Lagenophora, and 925 for 

 Uncinia tenuis. Stations 75 and ']'] — 79 are situated on this line; note Gleichenia, 

 Rubus geoides and a number of Austral bryophytes. On the other hand, not 

 few of the Alpines were not observed below 1300 m. PI. 114, 115. 



80. (17.) Acaena ;;/^j-c7///r;7?;/rt-Anthoxanthum-Sociation. Near summit of Cerro 

 Correspondencia, c. 1350 m, 14 — 152 1917. Soil stony and strewn with angular 

 boulders; subsoil moist, clayey-stony. PI. 114, text fig. 42. 



11:2 

 Anthoxanthum odoratum 2-3 

 Gleichenia quadripartita 2 

 Agrostis tnasafuerana I 

 Blechnutn chilensc i 

 Erigeron luteoviridis i 

 Libertia formosa I 

 Lophosoria quadripinnata i 

 Pernettya rigida I 



II: I 

 Acaena masafuerana 2 greg. 

 Lycopodium scariosum 2 

 Erigeron turricola I 

 Euphrasia formosissima I 

 Gnaphalium spiciforme i 

 Lagenophora Harioti I 

 Luzula tnasafuerana i 

 Lycopodiu7n magellanicum I 

 » scariosum I 



I 

 Nertera granadensis 3 greg. 

 Galium masafueranum i 

 Hytnenophyllum falklandicum I 

 Rubus geoides i 

 Serphyllopsis caespitosa \ . femandeziana 



Breutelia Masafuerae 

 Ditrichum longisetum stones 



Polyiriclindeiphus magellanicus 

 Ffychomniuin piychocarpum greg. 

 Rhacomitrium lanuginosum 



» sytnphyodontum greg. 



Thysanomitrium Richardii, often as a 



dark fringe around boulders 

 Zygodon pentastichutn 



Acrobolbus excisus 

 Frullania magellanica stones 

 famesoniella colorata greg. 

 L^epicolea ochroleuca greg. 

 Lepidolaena magellanica 

 Plagiochila fasciata stones 



» homomalla greg. 



» jetnotidens 



Mylia repens 

 Solenostoma crassulum 



Cladonia aggregata 



•n coccifera 



» gracilis 



» pyxidata greg. 

 Lecanora atra stones 



» polytropa stones 



Lecidea leucozonata stones 

 Placopsis gelida var. greg. 

 Pseudocyphellaria endochrysea 

 Stereocaulon paschale v. magellanicum 

 » proximum v. compactius 



Leptodontium fernandeziaman 



81. (18.) Acaena m as af uer ana- AnthoyianthvimSocxaXXon. Same locality and 

 date. Level, much less stony soil; dense carpet of flowering plants, leaving little 

 room for cryptogams. 



