TORTULACEJE.] 2OI [Pottia. 



Pottia Stark. C. MUELL. Synops. i, 547 (1849). MITT, in ann. nat. hist. Ser. 2, viii, 312 

 (1851), Journ. Bot. 1871, p. 3. LINDB. de Tort. 219 (1864). HUSN. Mouss. nord-ouest. 

 66 (1873). SCHIMP. Synops. 2 ed. 156 (1876). JURATZ. Laubm. oester.-ung. 92 (1882). 

 LESQ. JAMES Mosses N. Amer. 103 (1884). 



Pottia mutica VENTURI DE NOT. Epil. bri. ital. 592 (1869). 



Tortula Starkci LINDB. Muse, scand. 21 (1879). 



Paroicous ; dwarf, caespitose. Leaves spreading, ovate- and 

 oblongo-lanceolate, papillose above, margin recurved, entire, nerve 

 reddish, excurrent in a short mucro ; cells rectangular at base, opake 

 and hexagonal above. Caps, on an orange seta, minute, oval or oblong, 

 glossy, castaneous, leptodermous ; cal. scabrous ; ann. narrow, per- 

 sistent ; lid orange, obtuse conic ; teeth flat, linear, obtuse or truncate, 

 of 3 4 artic. entire or perforated, papillose, pale yellow, erect when 

 dry. Antheridia axillary in upper leaves, sometimes covered by a bract. 

 HAB. Fallow fields and banks ; not common. Fr. 12 3. 



Near Dublin and Cork. Cliffs on Sussex coast and Hurstpierpoint (Mitten). Rotting- 

 dean (Davies 1855) ! ! Plymouth (Holmes 1867) ! ! Beaumaris (Hunt 1871). Buxton 

 (Hunt 1872) ! ! Penzance (Curnow). 



Var. ft. affinis (Hook. Tayl.) 



Leaves longer, paler and more erect ; teeth very short, truncate. 



Sv-K.Weissia affinis HOOK. TAYL. Muse. br. 44, t. 14 (1818). BRID. Bry. un. i, 354. HOOK. 

 Br. fl. 20. GRAY. 



Dermatodon aff. HUEBEN. Muse. no. 

 Anacalypta aff. FCERNR. 1. c. 



Anacalypta Stark, ft- brachyodus. Bry. eur. C. MUELL. 



Pottia Stark. Var. ft. brachyoda. LINDB. de Tort. 219. SCHIMP. Synops. 2 ed. 

 HAB. Coast of Sussex, Durham and Anglesea, Dublin. 

 Var. y. Davallii (Sm.) Lindb. 



Very small ; leaves patulous, becoming red by age, nerve rufous. Caps, 

 ovate, truncate, lid large. 



SYH.Gymnostomum Davallianum SM. in KON. SIMS Ann. Bot, i, 577 (1805), et in SCHRAD. 

 Journ. i, 191. 



Gymn. rnfescens SCHULTZ Fl. starg. 278 (1806). NEES HNSCH. Bry. germ, i, 121, t. 9, f. 

 i. BRID. Mant, 12. Bry. univ. i, 62. 



Gymn. minutulum SCHLEICH. Cat. pi. helv. 29 (1807). WEB. MOHR Tasch. 479. SCHWAEGR. 

 Suppl. I, P. I, 25, t. 9. BRID. Mant. 12 ; Bry, un. i, 61. NEES HORNSCH. SCHIMP. 

 DE NOT. HUEBEN. 



Gymn. conicum SCHLEICH. 1. c. SCHWAEGR. Suppl. I, P. I, 26, t. 9. HOOK TAYL. 12, t. 8. 



Eng. bot. t. 2676. BRID. op. c. NEES HORNSCH. HUEBEN. DE NOT, &c. 

 Gymn. reflexum BRID. Bry. univ. i, 63. 

 Pottia minutula, rufescens and conica FUERNR op. c. 10. 



Pottia minutula et Var. ft. rufescens and y. conica Bry. eur. WILS. Bry. br. 93. SCHIMP. 



Synops. BERK. DE NOT. 

 Pottia Starkei Var. y. gymnostoma LINDB. de Tort. 219 (1864). 



HAB. Clay soil and fallow fields ; not uncommon. 



Although the three plants here brought together, are usually regarded 

 as distinct, there is no structural difference to be detected between them ; 

 the capsule is very variable in length, and the peristome equally so in the 

 amount of its development. 



