divergent, not dilated at base, elongated, pale green, pellucid, with larger
areolation ; nerve broader, margin more or less distinctly subserrated.
H a b .— Ben Nevis (McKinlay 1863)! near Bangor, N. Wales (J . Griffiths
1879) ! !
I am indebted to the kindness of Mr. Hobkirk for this very striking
variety, only found in the barren state.
3. P O L Y T R IC H U M D i l l e n .
(C a t . p i. g is s . 2 1 1 ( 1 7 18 ) .)
Plants short and simple, or tall, showy and branched, innovating
from radical protonema, or subterranean stolons, or from middle o f
stem. L e a v e s from a membranous, sheathing base, rigid, coriaceous,
sca rce altered by drying, nerve broad, covered w ith v ery numerous
erect lam e lla , margin spinoso-serrate. Ca lyp tra dimidiate, with straight
defluent tomentum, covering all or most o f capsule. Capsu le erect
or cernuous, terete and cyhndraceous, or prismatic or cuboid, and 4,
ra re ly 5— 6 angled, tap er in g to a neck or with a small discoid or
subglobose hypophysis. L id convex, apiculate or with a straight
beak. T e e th 32 or 64, adhering a t apex to the papery epiphragm.
An extensive genus scattered over the whole world and exhibiting
great diversity in the size of the individuals, some of the species forming
' small groups of closely allied forms. Above 100 species belong to the
sections with rounded fruit (commonly combined into the genus Pogonatum)
and about 30 to that of Eupolytrichum. The derivation is from rrokvs many,
6pi( hair.
C l a v i s t o t h e S p e c i e s .
Capsules rounded.
Leaves short, broadly lanceolate, subinvolute at margin.
Leaves obtusely toothed. Capsule subglobose. Columella cylindric.
snbrotuiidtiin.
Leaves sharply serrate. Capsule longish oval. Columella 4-winged.
Leaves longer, narrowly lanceolate, acute.
Capsule subcylindric, erect, terete, papillose.
Capsule oblong, tumid, somewhat inclined, smooth.
aloides.
uvnigcvuin.
alpinum.
Capsules angular.
Leaves entire with an inflexed margin.
Leaves obtuse at apex. sixangnlare.
Leaves aristate at apex.
Arista short, smooth, coloured; stems short, leaves spreading, recurved;
capsule square, prismatic. juniperinum.
Arista the same ; stem tall, leaves erecto-patent, straight ; capsule small,
cuboid. strictum.
Arista longer, rough, hyaline. piliferum.
Leaves sharply serrated, plane, acuminate.
Capsule ovate, obscurely angled, Hd rostrate ; leaves short. _ gracile.
Capsule oblong, 4— 6 angled, leptodermous; lid conical, pointed.
attenuatum.
Capsule cubic, acutely 4 .angled, pachydermous, with a distinct hypophysis ;
lid conico.rostellate commune.
h>
Sect. I . A L O W E L L A C . M u e l l .
Stem short. L e a v e s few, rather broad, more or less involute,
resembling those o f a miniature aloe. Capsule oval or cylindric.
I. POIYTEICHUM SUBROTUNDUM Huds.
Dioicous ; subgregarious. Stem v ery short, simple ; leaves patent,
lanceolate, rather obtuse, remotely denticulate above. Capsule globose-
urceolate, wide-mouthed ; lid conic, ros tellate. (T. V I , A.)
S y n .— Adiantum aureum minus, capitulis rotundis, B o b a r t . R a y Syn. St. Br. i ed. app. 237
(1690).
Polytrichum minus, capsulis subrotundis, calyptra quasi lacera coronatis D i l l . Giss. 221
(1719), et Syn. 3 ed. 91, n. 3 (1724).
Polytr. nanum, capsulis subrotundis galeritis, aloes folio non serrato D i l l . Hist. m u s c . 428,
55) f* Ö (1741) et Herb.
Mnium polytrichoides a. L . S p . P I. ii, r i i 2 , n. 13 ( 17 53 ). P o l l i c h PI. p a la t . n. 9 9 0 ( 1 7 7 7 ) .
Ditto Var. rotundifnictum E h r h . in H a n n . M a g . 1780, 236. .
Polytr. subrotundum H u d s . Fl. Angl. 400 {1762). C u r t . Fl. Lond. t. 68 (1778). R e l h .
Fl. Cant. Suppl. 16 (1786). W i t h . Bot. arr. Br. Veg. 3 ed. 786 (1796). M e n z . in Tr.
Lin. Soc. iv, 68, n. 2 (1798). H u l l Br. FL P. 2, 247 (1799). S m ith Fl. Brit, iii, 1378
(1804) ; Eng. Bot. t. 1624 (i8o6). T u r n . Musc. hib. 89 (1804). M a r t . Fl. crypt.
Erlang. 80 {1817). D u b y Bot. gall, ii, 547 (1830). L in d b . in Not. ur Sallsk. Fn. Fl.
fenn. forh. ix, 141 (1867.)
Polytr. nanum N e c k . Meth. musc. 119 (1771). S c h r e b . Spic. fl. lips. 74 (1771). S w t z .
Meth. musc. 26, n. 6, p.p. (1781). L e y s s . Fl. hal. 2 ed. 263 (1783). H e d w . St. crypt,
h 35) 13 (1787) ; Sp. musc. 95 (1801). M e n z . S m . T u r n . M a r t . op. c. T imm Fl.
meg. n. 771 {1788). R o th Fl. germ, i, 458 (1788). S i b t h . FI. Oxon. 306 (1794). B r id .
Musc. rec. ii, P. I, 88 (1798) ; Sp. musc. I. 71 (1806) ; Mant. 200 (1819). H u l l Br. Fl.
P. 2, 247 (1799). S c h u l t z Fl. Starg. 286 (1806). Eng. Bot. t. 1625 (1806). W e b .
M o h r Bot. Tasch. 227 (1807). V o it Musc. herb. 61 (1812). S c h w a e g r . Suppl. i, P. 2,
324 (1816). H o o k . T a y l . Musc. Brit. 28, t. 11 (1818). F u n c k Moostasch. 70, t. 57
(1821). H o o k . Fl. Scot. P. 2,126 (1821); Brit. FI. ii, 51 (1833). W .a l l r . Fl. crypt,
germ, i, 197 (1831). H u e b e n . M u s c . germ. 524 {1833). R a b e n h . Deutsch. Kr. Fl. ii,
3) 235 (1848). C. M u e l l . Syn. musc. i, 204 (1849). H a r tm . Skand. Fl.
Pol. nanum var. ß . W e i s s FI. gott. 175 (1770). H u d s . op. c. 2 ed. 470 (1778).
Pol. aloifolium ß . S c o p . Fl. e a rn . 2 ed, ii, 3 10 (17 72 ).
Pol. cricoides H o f fm . Deutsch. Fl. ii, 24 (1795). Wib. Fl. Werth. 291 (1799).
Pol. pumilum S w a r t z in W. ak. nya Handl. xvi, 271 (1795) ; Disp. musc. Suec. 77 et 108,
t. ix, f. ig (1799), et Adnot bot. 166 (1829). B r id . Sp. musc. I, 69 (1806), Mant. musc.
199. H e d w . Sp. musc. 97, t. 21, f. 7-9 (i8oi). S t e u d . nom. crypt. 353 (1824).
Pogonatum pumilum P. B e a u v . Prodr. 84 (1805). B r id . Bry. univ. ii, 116 (1827).
Pog. nanum P. B e a u v . 1. c. et in Mem. soc. Linn. Par. i, t. xi, f. 3. R ö h l . ann. Wett.
Ges. iii, 231 ( 18 14 ); Deutsch. Fl. 1 0 ,6 9 ( 1 8 1 3 ) . B r id . Bry. univ. ii, 1 1 7 (1827 ). B r .
S c h im p . Bry, Eur. iv, Mon. 5 , t. 7 (1844) ; Syn. musc. Eur. 438 (i860), et 2 ed. 534 (1876).
W i l s . Bry. Brit. 206, t. xi (185 5). B e r k . Hand. Br. m. 210, t . 19 , f. i (1863). M i l d e
Bry. Siles. 248 (1869). D e N o t . Epil. Briol. Ital. 340 {1869). H o b k . Syn. br. m. lo i
(1873). H u s n . M ouss . Nord.ouest 13 4 (1873).
Pol. intermedium B r id . Sp. m u s c . i, 70 (1S 0 6 ) .
Pog. intermedium R ö h l . Deutsch. Fl. 2 ed. iii, 60 (1S13).
Pol. scmidiaphanum B r id . M a n t . m u s c . 200 ( 18 1 9 ) .
Pog. nanum ß . scmidiaphanum B r id . B r y . u n iv . ii, 1 19 .
Pog. subrotundum L in d b . in H a r tm . Skand. Fl. g ed. ii. 44, inter s y n o n . (1S 6 4 ).
D io ico u s ; la xly gregarious. Stems very short, simple, naked at
base ; leaves crowded, embracing the stem, patulous, olivaceous-green,