MNIOIDEAE.  POLYTRICHUM. 561 
serratis, obscure chlorophyllose densissime lamellosis, 
cuspidatis haud aristatis et theca minus papillosa longe . 
differt. 
Sectio H. Cephalõtrichum Br, et Sch, — Plantae elatio- 
res simplices, basi nudae, apice rosulato - foliosae; folia juniperoidea 
stricta planiuscula; theca aequalis laevis. 
9b. P. comosum Schimp. (in litteris sub Pogonato!); 
P. subulato proximum; caulis simplex, 1— 11/ altus; 
folia inferiora et media adpressa, superiora comantia et 
patentia recurva, siccitate laxe incumbentia, coriacea so- 
lida nec tenuia e basi semivaginante lingulata haud acuta, 
plana, dorso convexiusculo, nervo semitereti quartam pa- 
ginae partem occupante, lamellis margine sulcatis et bi- 
seriatim obtuse dentatis, margine pallide ferrugineo, ad 
basin vaginantem usque dentato; perich. vaginula vix 
longiora, lanceolata, vaginantia, solo apice margine den- 
tata et in nervo lamellata; theca in ped. subunciali erecta, 
cylindracea, fusca, operc. depresso - conico acuminato, 
breviori, calyptra dense ferrugineo-pilosa. 7. 
Patria. Mexico, Pico de Orizaba: Liebmann. 
A. P. subulato ex animadv. auctoris primo intuitu no- 
tis cursive impressis differt. 
Incertae sedis. 
P. Jamesoni Tayl (Lond. Journ. of bot. 1848. p. 
188.); dioicum; caulis laxe cespitosus simplex erectus 
brevis brunnescens inferne nudus, parte foliosa superiore 
4-lineari; folia siccitate et humore plana, haud torta, 
erecto - patentia, ex lata amplexante basi linearia acumi- 
nata denticulata, nervo dilatato; theca in ped. biunciali 
erecta linearis angusta, basi obconice apophysata quadri- 
lata, parum curvata; operc. hemisphaerico, rostro elon- 
gato conico compresso; perist. d. erecti breves Saepius 
bifidi. . 
P. polysetum Hook. et Arn. ex Mitten, Lond. Journ. of bot. 1851. 
p. 50. 
Patria. Monte Pichincha Andium Quitensium: W. 
Jameson, Dec. 1846. 
36 * 
