16 HOLL ON THE PLANTS OF MADERA. 
complanata, Linn.—Musci. Anictangium lapponicum, 
Hedw. Hymenostomum contortum, Kunz. Diphyscium 
foliosum, Mohr. Pterogonium Smithii, Schw. Macromitrion 
nigrescens, Kunz. Dicranum flexuosum, Hedw. Leucodon 
morensis, Schw. Trichostomum polyphyllum, Schw. Bar- 
bula cespitosa, Schw. B. rigida, Hedw. Webera longi- 
collis, Hornsch. Bartramia rigida, Brid. Bryum annoti- 
num, Hedw. Bryum erythrocarpum, Brid. Funaria hygro- 
metrica, Hedw. F. Fontainesii, Schw.—Fitices. Equisetum 
arvense, Linn. Lycopodium Selago, Linn. L. denticulatum, 
Linn. * Ophioglossum Lusitanicum, Linn. Gymnogramma 
Ceterach, Spreng'. G. leptophylla, Desv'. G. Totta, Schlecht. 
* Notochlæna lanuginosa, Desv. Polypodium vulgare, Linn. 
Pteris arguta, Vahl. P. aquilina, L. Asplenium palma- 
tum, Sw. A. rotundatum, Klfs. A. marinum, Linn. A. 
monanthemum, Sw. A. ebeneum, Ait. A. Trichomanes, Linn. 
A. Canariense, Willd. A. Filix fæmina, Bernh. A. acutum, 
Bory. Blechnum boreale, Sm. Woodwardia radicans, Sw. 
Alantodia umbrosa, R. Br. Aspidium auriculatum, Sw. A. 
patens, Sw. A. molle, Sw. A. Oreopteris, Sw. A. filiæ mas, 
Sw. A. spinulosum, Sw. A. dilatatum, Sw. A. lobatum, 
Sw. A. regium, Sw. Adiantum reniforme, Linn’. A. Ca- 
pillus, Sw'. Cheilanthes fragrans, Sw'. Davallia Canarien- 
sis, Sw. * Dicksonia Culcita, L’ Herit. Trichomanes specio- 
sum, Willd. Hymenophyllum tunbridgense, Sw.—(All the 
Ferns are from an elevation of 2000 to 3000 feet, except 
those marked ("), which are only found in the region of 
the Cacti.) —PorawocEToNrEx,. Potamogeton natans, Linn. 
P. fluitans, Roth.—AnorpEx. Caladium mymphec folium, 
Ventt Lemna minor, L. L. polyrrhiza, L.— GRAMMI- 
NEE. Digitaria setigera, Roth. D. sanguinalis, Pers. 
+ This plant is much cultivated on account of its esculent root: in 
autumn the tubers are planted in rows, in a swampy soil, usually near 
the mountain-brooks, in order that the roots may be more sure of mois- 
ture. When the plants are three years old, the tubers are considered 
