Muscr Exoric:.—Humboldtiani. 
ORTHOTRICHUM LONGIFOLIUM. 
Orthotrichum caule repente, ramis erectis, foliis lanceo- 
lato-subulatis flexuosis siccitate crispis, seta longa, 
capsula brevi ovata sulcata, ciliis nullis, dentibus 16 
per paria unitis.. (Tas. XLIV.) 
Has. Ad radices Bifarie glauce* altitudine 950 hexapod., re- 
_gione temperata, in devexis montis Avilz prope Caraccas. 
Humboldt et Bonpland. 
Caules repentes, nudiusculi, ramosi, ramis erectis. Folia nume- 
rosa, horizontaliter patentia, lanceolato-subulata, carinata, 
flexuosa, integerrima, nervo ad apicem attingente percursa, 
£ 
» Superiora aureo-flavescentia, nitida. Periche- 
tialia parva, anguste lanceolata, nervo brevi obscuro. Seéa, 
ob caulis innovationes, non raro lateralis, semiunciam longa. 
_ Capsula ovato-rotundata, vel suburceolata, rufo-fusea, di- 
stincte sulcata. Peristomii dentes 16, pallidi, per paria 
uniti, 
It is not easy at first sight, except by the decidedly sulcated 
capsule, to distinguish this plant from Anictangium cirrhosum of 
‘Hedw. (Sclotheimia? Schwaegr.); but when the leaves come to 
be more accurately examined, they will be found to be neither so 
long as those of 4. cirrhosum, nor in the least serrated. The 
operculum and calyptra I have not seen; but judging from the 
general habit of the plant, this latter may be expected to resem- 
ble that of O. longirostre, gracile, and their affinities. 
- Fig. 1, plant nat. size. Fig. 2, leaf. Fig. 3, perichetium. 
Fig. 4, leaf of ditto. Fig. 5, capsule. Fig. 6, teeth of peristome. 
_* Humboldt et Bonpland, Pt, Bquinoct. vol. ii. p. 119. 
