Muscti Exorici. 
HOOKERIA PALLESCENS 
Hookeria caule suberecto vage ramoso, ramis compressis, 
foliis undique imbricatis ovatis obtusis minute reticu- 
Jatis, basi binervibus, seta elongata, capsula subovata, 
calyptra multifida. (Tas. XX XVIII.) 
Haz. Ad ripam fluminis Orinoco prope Esmeraldam, locis opacis. 
Humboldt et Bonpland. 
Caulis 2-3-uncialis, erectus, vage ramosus, raémis compressis. 
Folia undique imbricata, albida, ovata, concava, obtusa, in- 
tegerrima, basi binervia, dorso versus apicem minute papillosa, 
substantia membranacea, vix succulenta, reticulis parvis. Pe- 
richetialia enervia. Seta sesquiuncialis, flexuosa. Capsula 
parva, nutans, ovata, medium versus contracta. Operculum 
non vidi. Calyptra levis, pallide fusca, mitriformis, basi in 
lacinias satis longas fissa, Peristomium Leskee, dentibus ext. 
brevioribus, 
RA 
This species will rank near Hookeria (Lesk., Hedw.) albicans. 
The very pale, almost white, colour is common to,both. Our 
plant is much larger, more straggling in its growth; the fruit- 
stalks are much longer; the leaves very obtuse, entire, slightly 
papillose at the back, with short nerves and a very minute reti- 
culation. In both the calyptra is multifid at the base, but the 
divisions are longer in this; both too are smooth, not marked 
with reticulations, of which the interstices are sunk so as to form 
Pits or hollows, as in Hook, lete-virens and ducens. 
Fig. 1, plant nat. size. Fig. 2, portion of a branch. Fig.3, 4, 
leaves, Fig. 5, perichetium and capsule. Fig. 6, perichetial 
leaf. Fig.7, calyptra. Fig, 8, outer peristome, Fig. 9, inner 
tto, 
