O R TH O T R IC H UM s p e c i o s u m .
Short-pedicelled Orthotrichum.
C l a s s a n d O e d e e CRYPTOGAMIA MUSCI, £ iw i . _ N A T . O e d . MUSCJ, Jms.
GENERIC CHARACTER.
Seta terminalis. Peristomium simplex vel duplex; dentibus vel 8 Irilinealis, vel
16 unilineatis per paria approximatis;.dliis 8 vel 16" vel raro membrana
erecta lacerata. Columella acuta. Calyptra mitriformis.—H ook. & G rev.
Seta terminal. Peristome simple or double; the outer one of 8 teeth, marked
with 3 longitudinal lines, or 16 marked with I line, approximated in
pairs : the inner one of 8 or 16 ciliary processes, or rarely of an erect,
lacerated membrane. Columella acute. Calyptra mitriform.
SPECIFIC CHARACTER,
G rthothichum speciosum; caulibus erectis, foliis ovato-lanceolatis, acuminatis,
pateidibus, marginibusque ad apicem fe r e recurvatis ; theca leviter sulcata’;
peristomium dentibus octo, demum sedecim refexis ; calyptra pihsa.
G. stems erect, leaves ovate-lanceolate, acuminate, spreading, the margins recurved
nearly to the summit; theca slightly sulcate ; teeth of the peristome
8, at length l6 reflexed; calyptra hairy.
G rthotrichum speciosum, Nees ah Esenbeck, in Sturm's Deutschl. FL—
Moug. et Nestl. PL Exsicc. No. 722— Funck, Deutschl. Moose, p. 34. t. 23.
— Richards, in Franklins Journ. p. 756.— Hook. Grev. in Edinb. journ,
o f Science, v. 1. p. 124.
G rthothichum striatum, Hedw. St. Or. v. 2. t. 36. f. 1.-8.
H ab. Gn trees and rocks, b u t rarely on the latter (never in this co u n try .?).
About Forfar, Mr D rummond. I t has also been found in Scotland by
Mr R eid . Kinordy, Messrs H ooker and G reville.
Stems 1-2 inches long, branched, erect. Leaves spreading, ovate-lanceolate,
acuminate, the margins recurved nearly to the apex. Theca supported
on a very short exserted fruitstalk (sometimes almost subimmersed), nearly
quite even when young, b u t at length more or less sulcate. L id shortly
rostrate. Calyptra hairy to the very base. Peristotne of 8 pale reflexed
teeth, which at length split into 16, approaching in pairs, and 8 ciliary
processes. The colour of the whole plant varies ; in this country it re-
sembles that of O. affine and 0 . striatum; b u t the specimens b rought from
the arctic regions were reddish-brown, and altogether more rigid and
robust.
VOL. I I I .