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O R T H O T R IC H UM L u d w i g i i .
L u dw ig 's Orthotrichum.
C l a s s a n d O b d e k CRYPTOGAMIA MUSCI, £m n— N a t . O r d . MUSCI, Jms.
GENERIC CHARACTER.
Seitz iermintiUs. Peristomium simplex vel duplex ; dentibus vel 8 trilineatis, vel
16 unilineatis per paria approximatis; ciliis 8 vel l 6 vel raro membrana
creda lacerata. Columella acuta. Calyplra mitriformis.— H o o k . & G r e v .
Seta terminal. Peristome simple or double ; the outer one o f 8 teeth, marked
with 3 longitudinal lines, or 16 marked with 1 line, approximated in
pairs: the inner one e f 8 or 16 ciliary processes, or rarely of an erect, lacerated
membrane. Columella acute. Calyptra mitriform.
SPECIFIC CHARACTER.
O h t h o t r i c h u m Ludwigii ; caulibus repentibus, foliis erecto-patentibus, anguste
lanceolatis, siccitate crispatulis ; theca pyrformi Icevi ad apicem solum-
modo plicata, ore contractissimo ; calyptra valde pilosa.
O. stems creeping ; leaves erecto-patent, narrow-lanceolate, crisped when
dry ; theca pyriform smooth, plicate at the very apex, the orifice exceedingly
contracted; calyptra very hairy.
O r t h o t r i c h u m Ludwigii, Brid. Muse. Suppl. p . 2 6 Schwaegr. Suppl. 1 .
Pt. 2. p. 24. t. 51— Moug. et Nestl. PI. Exsicc. Fog. No. 617.— Sturm,
Deutschl. Fl. icon.—Hook. Grev. in Edin. Jtmrn. o f Science, v. 1. p. 125.
O r t h o t r i c h u m clausum, Hornsch. MSS.?
S p l a c h n u m Wufenianum, Schwaegr. Suppl. 1. Pt. 1. p. 46. t. 14. ’
H a b . On the trunks and branches of trees, especially those with smooth
bark, as Birch and Hazel. About Forfar, Mr D r u m m o n d . Glen Fal-
lich ; and the country around Callender and the Pass of L eny, plentiful,
Messrs H o o k e r and G r e v i l l e .
Stems creeping, and throwing up a number of short, simple, or divided
branches, mostly of a rather pale green colour. Leaves numerous, erecto-
patent, somewhat crisped when dry, narrow lanceolate, and slightly dilated
at the base. Seta about a quarter of an inch long, slender. Theca
pear-shaped, of a pale yellowish colour, quite smooth, suddenly plicate
or puckered at the apex, and the orifice so contracted in consequence, as
to bring the base of the teeth into contact. Peristome of 8 very pale geminate
teeth, which at length divide into 16, approaching in pairs : and
8 ciliary processes, exceedingly slender, and arising from the sides of the
outer teeth. Lid short, conico-rostrate. Calyptra hairy to its very base.
VOL. I I I .