POTTIOIDEAE. rarcnosrOUM. - 519 
lis angustis firmis rectangularibus inferne laevibus su- 
perne punetulatis, supra basin angulato rotundatis minu- 
tissime papillosis areolata, supra basin brevissimam mar- 
gine ultra medium revoluta, apicem versus inaequaliter 
serrata, excurrentinervia; perichaetialia e basi longe va- 
ginante, cujus cellulae angustae elongatae ubique parieti- 
bus interruptis instructae firmae haud laxae tenerae, 
longe anguste acuminata valde undulata; theca in pedun- 
culo brevi tortili rigido erecta cylindrico-oblonga; perist. 
dentes (thecae deoperculatae supramaturae) rudimentarii 
brevissimi. 
Trichost. squarrosum Hsch. in Musc. Mexic. Depp. et Schied. — 
Didymodon luteus Tayl. in Lond. Journ. of bot. 1846. p. 48, oper- 
culo breviter rostrato? 
Patria. Mexico: Deppe et Schiede. Monte Pi- 
chincha Andium Quitensium: W. Jameson. 
A Tr. squarroso simillimo notis cursive impressis 
distat. 
18. Tr. epunctatum C. Müll; habitus Tr. squar- 
rosi, sed gracilius flavius humilius; folia caulina anguste 
lanceolata tortilia , madefacta flexuosa, valde falcata, 
apicem versus inaequaliter serrata, margine parum re- 
voluta, basi e cellulis minute hexagonis teneris pelluci- 
dis laevibus haud punctulatis brevissima praedita, supra 
basin minutissime incrassate rotundato-areolata, minu- 
tissime papillosa, nervo subexcurrente; perichaetialia con- 
volutaceo - vaginantia, longiora, basi longa elongate an- 
guste flavide areolata laevia; theca in pedunculo brevi 
erecta cylindrica. 
Trich. squarrosum Brid. I. p. 498. excl. Syn. Hook. — Neckera 
viliculosoides P. B. Prodr. p. 78. e spec. auth. — Encalypta squar- 
rosa Brid, Sp. Musc. I. p. 93. 
Patria. Ynsula Bourbonis, ubi in planitie des Chi- 
cots latissime cespitosum legit Bory St. Vincent. 
19. Tr. stellatum C. Müll; caulis erectus elonga- 
tus valde squarrosus robustus dichotome ramosus, apice 
stellate comosus, ramis elongatis; folia lete complicato- 
37 * 
