THE VECIF.TATION OF THE JUAN FERNANDEZ ISLANDS 



947 



Rumex acetosella i 

 Stellaria media i 

 Uncinia tenuis i 



I 

 Nertera granadensis var. i 

 Rubits geoides i 

 SerPyllopsis caespitosa v. fernandeziana I 



Bartrainia aristata 



» patens greg. 



DitricJiuin longisetiiin 

 Psilopilum antarctictttn 

 Rhacocarpiis Humboldtii 

 Rhacomitriuiu striatipilu>n 

 Zygodon pentastic/ium 



Acrobolbus excisus greg. 

 Anast?-ophyIluni leucocepJta/iini 



I [nrpalejeunea setifera 

 Herbert a rtincinata greg. 

 I sot ac his sp. 



Jamesoniella colorata greg. 

 I.epidolaena magellanica 

 I.epicolcd ochrolcuca greg. 

 Li'phocolea roiundifolia greg. 

 Plagiochila fuscohrunnea 



» homonialla 



SchistocJiila pachyla 

 Trichocolea verticillata 



Nephroma antarctician 

 Parmelia saxatilis 

 Peltigera polydactyla 

 Placopsis gelida var. 

 Stereocaulon rantulosum 



85. (30 D.) Alpine heath on summit ridge of Los Inocentes, i 300 — i 500 m, 

 9/3 191 7. Patches of heath between exposed bed-rock. Above i 300 m the vege- 

 tation has the character of a scrub, similar to the scrub formation of the ridges 

 on Masatierra, with Perneiiya rigida and Blechnum cycadifolium as leading species, 

 but above i 400 the heath was more open and cushion-plants {Abrotanella, Oreo- 

 bolus) became conspicuous, continuing to the summit. Unfortunately, thick fog 

 forced us to return without having had time to analyse suitable sample-plots. 



The following species were noted above i 350 m. 



Abrotanella crassipes, common above 



I 400 m 

 Acaena masafiierana, also down to 1 100 m 

 Blechnum cycadifolium, to i m tall 

 Empetrum rubrum, a single plant on 



the summit 

 Erigeron Ingae v. Innocentiutn 

 Galium masafueranuni 

 Gleichenia quadripartita 

 Histiopteris incisa 

 Hymenophyllum pectinatum 



» rugosum 



Lagenophora Harioti 

 Lophosoria quadripinnata 



Myrteola num/nularia, also down to 



1 1 00 m 

 Oreobolus obtusangulus, above 1 400 m 

 Pernettya rigida, common 

 Rubus geoides 

 Uncinia tenuis, also down to iioo m 



Ptychofnnium ptychocarpum 

 Rhacomitrium lanuginosum 

 Zygodon pentastichum 



Lepicolea ochroleuca 



Trichocolea verticillata 



Cladonia pycnoclada 



Usnea subtorulosa from c. i 000 m 



Beside the bryophytes and lichens mentioned under the stations, the fol- 

 lowing species are more or less common in the heath formation; the list is of 

 course far from complete, as numerous species must have escaped a non-spe- 

 cialist. 



Rhaphidostegium aberrans 

 Thuidium Masafuerae 



Radula hastata 



Lichens on stone 

 Buellia barrilensis 

 Caloplaca Selkirkii 



