HYPNOIDEAE. HYPNUM. 1 459 
418, H. ptychocarpon Schw. (Linn. XVIII. 1844. p. 
561. t. 10.) ; dioicum ; caulis longissimus decumbens gra- 
cilis flexuosus. foliosus, ramis remotissimis patentissimis 
brevibus simplicibus v. longioribus et iterum remote. pa- 
tenti-divisis, uti caulis` siccitate ob folia laxe conferta 
compressis, humore remotifoliis, lutescentibus perangu-. 
stis; folia caulina madore patentia, late rotundate ovata 
breviter acuminata, subcochleariformi - concava , pluries 
regulariter. plicata, margine late convexo subintegro, ner- 
vis binis tenuibus obsoletis v. nullis, cellulis scariosis 
pallidissimis conflatis, basi fuscis, alaribus ad alas conve- 
xas vix ullis incrassatis intense fuscis; perichaetia angu- 
stissime cylindrica exserta fusca, folis subconvolutaceis 
angustis , apicibus subreflexis, enervibus, conflate areola- 
tis, aureo-coloratis, integerrimis; theca in ped. mediocri 
gracili rubro laevi subhorizontalis, anguste cylindrico-0b- 
longa 8-sulcat« , fusca; perist. d. ext. breviusculi, fissura 
diaphana notati, int. subperforati pallidi, ciliis binis ae- 
quilongis. 
Leskea? Gayana Mont. Ann. sc. nat. 1845. 4. p. 95. — Hist, 
de Chile, auct. C. Gay, Bot. Crypt. t. 3. f. 4. — Hypnum Gaya- 
num Mont. in litteris. 
Patria. Chile australis, ad corticem arborum , Val- 
divia et Colenagna: Cuming, Philippi, C. Gay. 
Notaculis illis variis expositis rite discernendum, € 
sectione H. aciculari affinissimum. 
419. H. brevirostrum Ehrh. (Pl. Exs. No. 85.); 
dioicum; caulis longissime repens sguarrosifolius; divisio- 
nes permultae decumbentes v. assurgentes rigidae fragi- 
les, ramis gracilioribus incurvis sguarrosifoliis attenuatis 
apice gemmaceis vage subdendroideo - ramosae , apice 
haud stellatim foliosae , latescentes, in axillis foliorum 
radiculis brevissimis acutissimis tubulosis pallidis dense 
obtectae; folia caulina laxe conferta erecta, humore valde 
patentia, e basi coarctata majuscule auriculatà late ovata, 
apice utrinque sinuato , in sinu acumine lato breviusculo 
terminata, haud reflexa, ruguloso-plicata, cavitate pro- 
