Increnienta florae janiaicensis. 75 



Lacovia, Black River, Malvern, Santa Cruz Mountains), Trelawney 

 (ausser den Küstenregionen besonders Troy und Tyre im östlichen 

 Theile des Cockpit Country, hier im Mai 1903, April, Juni und De- 

 ceraber 1904, Xovember 1905, September 1906), St. James (Montego 

 Bay, Kempshot Hill, Catadupa, Lapland), Hanover (Lucea, Green Is- 

 land, Belvidere und besonders Dolphin Head), Westmoreland (Shaftston, 

 Grand Yale, Negril, die Ränder des Great Morass, Darliston, Blue- 

 fields etc.). 



Harris theilte mir über die Vegetation Jamaicas folgende Beob- 

 achtungen mit: The difference in teraperature at the various altitudes 

 are appreciable, but shade and moisture are niore important factors 

 in influeucing the distribution of species. Many plants that grow at 

 high altitudes may also be found in heavy woodland at lower elevations 

 when moisture and other conditions are favourable for their growth. 

 Some species are able to adapt tbemselves to circumstances and are 

 widely spread, being found practically everywhere from sea-level to 

 the summit of the highest mountains, whilst others are confined to 

 very limited areas. Laelia iiionopliylla , for instance, is found only ou 

 trees on the ridges of a limited area of the St. Andrew mountains; 

 but there are other species each of which, to the best of our present 

 knowledge, is confined to a very small area in one locality. — There 

 is a general resemblance in the flora of Mount Diablo, the Cockpit 

 Country and Dolphin Head, but each of these regions has produced 

 many species which are peculiar to it. — Orchids are found from 

 the coast to the summit of the Blue Mountains, but the majority of 

 the .species occur at mid- elevations, 2500 — 3500 feet altitudes. They 

 are principally epiphytes, but are also found on rocks, on bauks and 

 amongst mosses. — Ferns, of which there are about 500 species, are 

 practically everywhere, but they abound in the wet woods in the 

 higher altitudes and probably four-fifths of the known species may 

 be found in the Blue Mountains. These are of all sizes from delicate 

 filmies like lace-work to giant tree ferns attainiug a height of 40 feet, 

 with magnificent crowns of fronds. 



Am 8. Mai 1903 kam Harris zum ersten Male in das Cockpit 

 Country nach Troy, einen Ort im westlichen Centrum der Insel, an 

 der Grenze der Parishes Trelawney, St. Elizabeth und Manchester ge- 

 legen, dessen Name sich bei früheren Sammlungen, soviel ich weiss, 

 niemals findet; die Gegend stellte offenbar, wie sich auch aus den 

 mitgebrachten Pflanzen ergab, ein völlig unerforschtes Terrain dar. 

 Nach Prof. Brittox, der Harris auf seiner letzten Reise dorthin be- 

 gleitete (Journ. New York Bot. Gard. VlI. 1906 p. 247) ist es sehr zer- 

 klüftet. Der Boden besteht aus sehr porösem Kalkstein, in tlem durch 



