g2 2 C. SKOTTSBERG 



11:2-3 II:' 



Ugni Molinae 1-2 Blechnum auriculatum 4-5 



Acaena arKentea 2 



II' 2 



Rumex acetosella 2 



Anthoxanthum odoratum 2-3 Micropsis nana i 



Escallonia Callcottiae i 



Blechnufn cycadifolium I 



48. Weeds observed by us in Valle Colonial. A few garden escapes and 

 weeds reported by earlier collectors, but not found again, have been excluded. 



Acaena argentea, Aira caryophyllea, Amaranthus chlorostachys and deflexus, Ammi vis- 

 naga, Anthemis cotula, Anthoxanthum odoratum, Apium laciniatum, Artemisia absinthium (re- 

 cently recorded), Avena barbata, Bidens leucantha, Briza minor, Bromus unioloides, Centaurea 

 melitensis, Cichorium intybus, Chenopodium multifidum and murale, Convolvulus arvensis, Cyno- 

 glossum creticum, Dipsacus silvestris. Euphorbia peplus, Geranium core-core, Gnaphalium chei- 

 ranthifolium and spicatum, Hordeum murinum, Hypochaeris glabra, Lobelia tupa, Lolium multi 

 florum, Lythrum hyssopifolia, Malva nicaeensis, Marrubium vulgare, Medicago arabica and 

 lupulina, Melilotus indicus, Micropsis nana, Modiola caroliniana, Oenothera mollissima, Oxalis 

 corniculata, Physalis peruviana, Plantago lanceolata and major. Polygonum aviculare, Ranunculus 

 muricatus, Rubus ulmifolius (recently recorded), Rumex acetosella, crispus and pulcher, Ruta 

 chalepensis, Setaria imberbis, Silene gallica, Silybum marianum. Sisymbrium officinale, Sonchus 

 oleraceus, Stellaria media, Taraxacum fernandezianum, Verbena litoralis, Vulpia bromoides, 

 Xanthium spinosum. 



49. Weeds of the valley floor in Puerto Ingles, 19/1 1917. 



Acaena argentea, Aira caryophyllea, Anthoxanthum odoratum, Avena barbata, Bromus 

 unioloides, Chenopodium multifidum and murale. Convolvulus arvensis, Cynoglossum creticum. 

 Euphorbia peplus, Geranium core-core, Gnaphalium cheiranthifolium, Lolium multiflorum, Malva 

 parviflora, Marrubium vulgare, Rumex acetosella, crispus and pulcher, Silene gallica, Silybum 

 marianum, Sonchus oleraceus. 



50. Weeds noted in Quebrada del Juanango, 9/4 191 7. 



Acaena argentea, Anthoxanthum odoratum, Avena barbata, Bromus unioloides, Dipsacus 

 silvestris, Erigeron canadensis. Geranium core-core, Hordeum murinum, Malva parviflora, Medi- 

 cago denticulata, Physalis peruviana, Rumex conglomeratus and crispus, Ruta chalepensis, Se- 

 taria imberbis, Silybum marianum, Sonchus oleraceus. Verbena litoralis. 



51. Weed flora on the talus strip in Bahia del Padre, 15/1 19 17. 

 Amblyopappus pusillus, Anthoxanthum odoratum, Apium laciniatum, Avena barbata, Bras- 



sica rapa and napus, Centaurea melitensis, Chenopodium multifidum and murale, Erigeron cana- 

 densis and crispus (linifolius), Hordeum murinum, Matthiola incana (PI. loi : 2), Medicago den- 

 ticulata, Melilotus indicus, Raphanus sativus, Rumex crispus, Silybum marianum, Sonchus ole- 

 raceus. 



The sand-field on El Puente (see above p. 894) had islands of vegetation on the margins, 

 abundant Chenopodium multifidum and scattered Avena barbata-patches, Brassica rapa, Hor- 

 deum murinum, Matthiola incana, Melilotus indicus, Silybum marianum and Sonchus oleraceus. 



The Vegetation of the sea-shore. 

 Most of the north coast of Masatierra, and practically the entire south coast, 

 is bordered by a vertical abrasion cliff, with little or no talus at the foot, washed 

 by a never-resting surf; around the bays the beach is shingles, boulders or gravel. 

 The nature of the rock is little favourable for the establishment of plant commun- 

 ities; it disintegrates readily under the force of the breakers and as a rule lacks 



