ToRTULACE^.] 208 [Tortula. 



SYN.—Gymn. ovatum Var. incanum Nees Hornsch. Bry. germ. 130, t. g, f. 5. Brid Bry. 

 univ. i, 61. 

 Pottia cavifolia Var. incana Schimp. Synops. 122. 



Hab.— Newhaven {Borrer 1838) ! Harbury, Warwick (Bagnall) ! ! 



2. TORTULA LAMELIATA Lindb. 



Autoicous ; stem simple. Leaves broad, oval-oblong, mucronate 

 vfith the excurrent nerve, very concave, nerve at upper part with 4 broad 

 lamellae. Caps, subcylindric, peristome very fragile, adherent to lid. 

 (T. XXX, D.) 



Syn. — Gymnostomum ovatimi Var. fS, gracile Hook. Tayl. Muse. br. 12 (1818) ; Br. Flora ii, 

 8 (1833). Gray Nat. arr. br. pi. i, 715 (1821). 



Pottia cavifolia Var. c. barbuloides Durieu MSS. Schimp. CoroU. 24; Synops. 122 

 (i860). 



Pottia cavifolia Var. S. gracilis Wils. Bry. br. 93 (1855). 



Tortula lamellata Lindb. de Tort. 233 (1864). Hobk. Syn. br. m. 64 (1873). 



Barbula concava Schimp. in Flora 1864, p. 210. Milde Bry. siles. no {i86g). 



Barb, cavifolia ScHiMP. Bry. eur. suppl. fasc. 3—4 (1866). Synops. 2 ed. 193 (1876). 

 HusN. Mouss. nord-ouest. 79 (1873). 



Pterigoneuriim lamellatum Juratz. Laubm. oester.-ung. 97 (1882). 



Autoicous ; stems short, simple, laxly csespitose. Leaves at base 

 small, distant, ovate, shortly piliferous, at middle broadly oval-oblong, 

 uppermost spathulate-ligulate, slightly acuminate, mucronate with the 

 excurrent nerve, all very concave, wings flattened towards margin, 

 papillose at back ; nerve furnished on the upper third in front, with 4 

 decurrent lamellae ; cells of upper part and of lamellae minute quadrate, 

 chlorophyllose, at base lax, hexagono-rectangular. Perich. bracts 

 narrower ; caps, on a straight rufous pedicel, erect, oblongo-cylindra- 

 ceous, castaneous, with many furrows when dry ; ann. simple, lid with a 

 long oblique beak, teeth on a broadish clathrate membrane, very slender 

 and fragile, pale, slightly twisted, generally breaking away, and remain- 

 ing adherent to the inside of lid, spores smooth. Male infl. basal, 

 gemmiform. 



Hab. — On the ground and on walls covered with earth. Fr. i — 2. 



Near Pontefract (No7vcU 1853) I ! Coombe Down, Bath (Mrs. Hopkins i860) I Kidling- 

 ton and Osney, Oxford (Boswell 1864) ! ! Aldrington, Sussex (Davies). Dublin {Moore). 

 Helmsley, Yorks. {Wesley 1878) ! ! 



The peristome is best seen through the lid of the young caps., but can 

 seldom be found at maturity, or can only be observed in small fragments 

 under the pressure of a covering glass. It also differs from the last by the 

 long seta, cylindric capsule and oblique beaked lid. 



B. Aloidese. Leaves obtuse, concave with involute margins, nerve very 

 broad, covered on upper side with granulose filaments. 



