H Y P N U M DIMORPHÜM.
Various-leaved Feather-Moss.
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Class an d O r d e r CRYPTOGAMIA MUSCI, Linn— N a t. Oed. MUSCI, Jms.
G EN E R IC CHARAC TER .
Seta lateralis. Peristomium duplex : ext. e dentibus 16 ; int. membrana plicata
16-Iaciniata, ciliis alternaniibus. Calyptra dimidiata.—H ook.
Fruitstalk lateral. Peristome double: the outer one o f 16 te e th ; th e inn e r
one o f a plicate membrane, cleft into 16 segments, w ith ciliary processes
between them. Calyptra dimidate.
S P E C IF IC c h a r a c t e r .
H ypnum dimorphum ; caule procumbente subpinnato vel fasciculate, fo liis ser-
rulatis basi binervibus, primariis cordato-acuminatis recurvis, rameis late
ovatis, obtusis vel acutis, dense imbricatis; theca ovata cernua, operculo co-
nico.
H. Stem procumbent, somewhat pinnate, or fasciculate, leaves serrulate,
(always.? ) 2-nerved at th e base, the primary ones cordate-acuminate,
re cu rv ed ; those o f the branches broadly ovate, obtuse or acute, densely
imbricated ; capsule ovate, cernuous, Ud conical.
H y p n um d im o rp h um , Brid. Suppl. Muse. 2. p . UQ.— Funck, Deutschl. Moose,
p . 64. t. 49.—D e Cand. Fl. Franç. v. 6. p . 233.— Moug. et Nestl. PI. F x sicc.
No. 627.
H ypnum diversifolium, Schleicher, Cr. Fxs. Cent. 3. No. 45.
H ypnum sq u a rro su lum . Voit, in Sturm’s Deutschl. Fl. ii. I I .
H ypnum H a lle ri, v a r. Schm. Suppl. 1. p t. 2. p . 264.
H ah. On the ground, in shady places, among rocks. Ben Lawers, Mr
W alker A rn o tt .
Plant growing in lax, subprocumbent masses on th e ground. Stems 2-3
inches in length or more, branched in a somewhat fasciculated manner,
or irregularly pinnated with unequal ramuli. Leaves minutely serrulate,
(always?) shortly 2-nerved, varying in shape: those of the main
stem cordate-acuminate, more or less reflexed, towards th e summit of the
stem much longer and more recurved, giving the whole summit an incrassated
appearance : those of the ramuli much shorter, broadly ovate,
and either acute or obtuse, frequently the latte r : they are besides densely
imbricated, and never reflexed. The ramuli are usually attenuated.
Fruitstalk three-fourths o f an inch in length. Capsule ovate, cernuous.
L id conical.
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