EXPLANATIONS AND ABBREVIATIONS. 
vi 
Regions or Zones of Vegetation in the Dezertas. 
N.D. — North or Little Flat Dezerta. 
Maritime wholly. — Sea-cliffs, and top of the Island at or a 
little above 300 feet. The principal plants are — 
Indig. — Artemisia argentea Herit., Teucrium heterophyUum Herit., 
Olea europcea L. a, subv. baxifolia Lowe, Jasminum odoratis- 
simum L.. Silene injlata Sm. y, maritima With., Matthiola 
maderensis Lowe, Crithmum maritimum L., Andryala robusta 
Lowe, Tolpis fruticosa Schr. a, Sonchus ustulatus Lowe, Calen- 
dula maderensis Lowe, Barkhausia divaricata /3. Lowe, Hel- 
minthia echioides Gaertn., Mesembrianthemum crystallinum L., 
M. nodi forum L., Pedrosia glauca Ait., P. argentea Lowe, Viet a 
capreolata Lowe, Ononis dent ata Lowe, Scrophularia argutaAAt., 
Plantago Coronopus L., Beta patula Ait., Suceda fruticosa L., 
Urtica urens L., Asphodelus Jistulosus L., Hordeum murinum L., 
Brachypodium distachyon L., Arthrochortus loliaceus Lowe, &c. 
M.D. or G.D. — Middle or Great Dezerta. 
1. Maritime. — Sea-cliffs, and up to a height of 800 or 1000 ft. 
Indig. — Monizia edulis Lowe, Crithmum maritimum L., Silene 
injlata Sm. y, maritima With., Matthiola maderensis Lowe, 
Crambe fruticosa Herit. j3, Phyllis Nobla L., Andryala robusta 
Lowe, Sonchus ustulatus Lowe, Tolpis fruticosa Schr. a, Calen- 
dula maderensis Lowe, Helichrysum melanophthalmum Lowe, 
Pedrosia glauca Ait., Plantago Coronopus L., P. arborescens 
Loir., Sideritis Massoniana Benth. /3, Suceda fruticosa L., &c. 
: 2 . Mountain. — Central Valley and Mountains, from 800 or 
1000 to 1000 ft. 
Cult, or naturalized. — A little Wheat and Rye, a few Firs (Pinus 
Pinaster L.), a Fig-tree or two, a few Cabbages, a Tobacco 
plant or two, Common Broom, Furze ( Ulex europccus L.),Milk 
or Holy Thistle ( Silybum Mariunum ( laertn.), Arundo I)onax 
L., Reseda Luteola L., Papaver somniferum L., &c. 
Indig. — Rapistnan rugosum (L.) Bergm. o. and /3, Ruta brac- 
teosa I)C., Tri folium august i folium L., T. lupulinum L., T. 
ligusticum Bulb., Lotus hispulus Desf., Ononis mitissima L., 
Mesembrianthemum nodijlorum L., Aster i sens aquations L., 
Helminthia echioides Gaertn., (ralaotites tomentosa Mcench., 
Phagnulon sa.rafilis L., Behi am plantagineum L., Murrubium 
vulgare L., Micromeria raria Benth., Rumex pulcher L., R. 
aeuleutus L., Urtica urens I i., U. membranaeea Poir., Carex 
dimisa Good., llolcrn lan at us L., Lagurus oratus L., Phalans 
cccrulescens Desf., P. paradoxa L. fil., Arena hirtufa Lag., A. 
fatun L., Briza maxima L., Festuca bromoides L., Bromus 
madritensis L ., Pterin aquilina L., &c. 
