HYPNACEiE.1 I29 ^HelicodoniiuiH. 



Dioicous ; stems arcuate, ascending, with slender fasciculate incurved 

 branches. Leaves crowded, not glossy, greenish-yellow, subscariose, 

 spreading or subsecund, oval-elliptic, acute, symmetric ; appressed when 

 dry, papillose at back, the margins recurved below, serrate above, with 

 two short nerves at base or a single one nearly half way, cells rhombic,. at 

 base narrowly rectangular, quadrate at angles. Perich. bracts pale, 

 broadly lanceolate, acute, entire ; seta reddish-yellow, capsule erect, 

 cylindric pale brown ; calyptra smooth, lid conic, obliquely rostellate ; 

 peristome yellow, the teeth linear, without lamellae, endostome without a 

 basal membrane, processes short, subulate. 



Hab.— Trunks and roots of trees and on stones on mountains. Fr. 5 — 6. 



Ben Lawers (Ariwtt &■ Gremlle), Craig Chailleach {Hunt 1868) ! Buttermere (Baker 

 1870) ! ! 



Var. |8. decipiens {Weh, Mohr) Br. Sch. 



More robust, in green, turgid tufts, branches curved inward, obtuse ; 

 leaves laxer, secund, asymmetric, ovato-spatulate, with short bluntish point?. 



Syn. — Ntcktra decipiens W. M. Bot. Tasch. 241 et 473 (1807). 



Pterigynandrum heteropterum Brid. Bry. univ. ii, 176 (1827). 

 Leptohymenium heteropterum Hueben. Muse. germ. 553. 



Do. filiforme jS. majus. De Not. Syllab. 81. 



Pterigynandrum filiforme fi, heteropterum Bry. eur. fasc. 46 — 47, t. 1. 

 Leptohymenium elaiochloron De Lobarz. in Raiding. Naturw. abh. I, 61. 



Do. filiforme /3. alpestre Rabenh. D. kr. fl. II, S. 3, p. 250. 



Da. Do. j3, crassius Hartm. Slcand. Fl. g ed. 26. 



Pterogonium decipiens Kinds. Laubm. Schwed. u. Norw. 13. 



Hab.— Wet mountain rocks. Ben Lawers I^Hunt 1865) ! 



Var. y. filescens Boulay. Muse. Fr. 170. 



Densely matted, creeping, yellowish-brown. Branches hair-like, 

 elongated, nearly simple, with distant minute leaves. 



Hab.— On a decayed tree in Glen Dole, Clova. (Hunt 1867) ! 



10. HELICODONTIUM Schwaeg. 



Suppl. Ill, p. II, 2 (1830). 



Plants small, succulent, very soft, growing on roots and trunks 

 of trees. Stem prostrate, irregularly branched. Leaves ovate, entire, 

 somewhat oblique, smooth, with a short nerve or nerveless. Capsule 

 erect, subcylindric, lid conical, calyptra cucullate ; peristome of 16 



