670 BRITTON: WEsT INDIAN MOSSES 
Palamocladium trichophyllum C. Miill. Flora 82: 465. 1896. 
Palamocladium trichophyllum subtile C. Miill. Hedwigia 37: 240, 
1808. 
Orthothecium trichophyllum Fleisch. F1..Buit. 3: 667. 1906. 
Plants light yellowish green, glossy; stems rooting and creeping, 
with simple erect branches, often 2 cm. high and prolonged into 
slender flagellate branchlets bearing foen septate gemmae in 
clusters in the axils of the upper leaves; branch-leaves crowded, 
spreading, glossy, strongly plicate when dry, lanceolate-acuminate, 
3-5 mm. long, ecostate, margins plane, serrate; cells linear, walls 
porose, slightly thickened, alar cells shorter and broader, curved, 
forming a small, serrate auricle. Autoicous, perichaetial leaves 
shorter, paler, more suddenly subulate, more sharply serrate. 
Seta erect, straight or flexuose, red, 15-25 mm. long; calyptra 
cucullate; capsule erect, ovoid-cylindric, sometimes contracted 
below the mouth when dry, 2-3 mm. long, lid rostrate; annulus 
none; walls with irregular square or hexagonal cells 27-54 mu long 
X 27 wide; neck short, stomatose; peristome double; teeth 
incurved, brown, narrow, not perforate, papillose, with slightly 
t 
trabeculate lamellae; endostome paler, also papillose with a short 
minutely papillose, unequal in size, 5u-16, maturing in winter. 
Forming bright glossy mats in shade on trunks and roots of 
tree-ferns and palms on high mountains, rarely on rocks. Fruit 
rare! 
HABITAT AND TYPE LOCALITY: “On bark and trunks of old 
trees, Jamaica.” 
DISTRIBUTION: Jamaica, Cuba, Porto Rico, Haiti, Santo 
Domingo, St. Kitts, Dominica, Martinigue. Guadeloupe, St- 
Vincent, Montserrat, and Trinidad to Venezuela. 
ILLustraTIons: Hedw. Sp. Muse. pl. 71; E. & P. Nat. Pf. 
xo: 7942); Sook 
ExsiccaTarE: Husnot, Pl. Ant. Fr. 183, as Meteorium sericeum 
Sch 
On account of the rarity of its fruit this species has been placed 
in a variety of genera none of which seem to me to be correct. 
Its double peristome and different habit remove it from Lepyrodon 
- and its tropical distribution from Orthothecium, the species of 
which are alpine or arctic and subarctic. Its relationship however 
seems to me to be more with the Entodontaceae, where Fleischer 
