TORTULACE.E.] 195 [Pottia. 



only just emerging from the leaves, ovate or ovato-elliptic, attenuated in 

 an oblique rostellum, fuscous ; cal. cucullate, reaching to middle of 

 caps, lid conical paler not separating; spores fuscous, nearly smooth. 



Male infl. gemmiform, in axils of upper leaves, bracts broadly ovate, 

 acuminate, outer with an excurrent nerve, vanishing in the inner ones. 



HAB. Fallow fields and banks ; rare. Fr. i 3. 



Near Croydon (Dickson). Downs at Piecombe, Lewes and Devil's Dyke (Borrer). Coast 

 at Aldrington and Cliff E. of Brighton (Mitten). Gateshead Fell (Thornhill). Map- 

 perley hills, Darlington (Backhouse). Ganthorpe, Yorks. (Spruce 1841). Bury St. 

 Edmunds (Eagle). Norwich ! Nottingham (Valentine). Buxton (Dr. Wood 1865) ! 

 Iffley, Oxford (Bosit'dl 1861) ! ! Woolsonbury hill (Davies 1867) ! ! Dovedale (Frascr 

 1866) ! ! Elie, Fife (Howie 1867) ! Whitbarrow, Lyth and Levens Park (Barnes 

 1872) ! ! Arnside Towers, on old ant hills (Barnes 1872) ! Howth (Orr). 



Var. (3. Thornliillii(PW/s.). 



Leaves patulous, spathulato-lanceolate, subreflexed, margins plane, 

 nerve subexcurrent ; caps, elliptic, rostrate, pedicel elongated. 

 SYN. Phascum bryoides var. Thornhillii WILS. Bry. brit. 33. 

 HAB. Old stubble fields near Newcastle (Thornhill 1841) ! 



Pottia bryoides has a peculiar looking capsule, much resembling that of 

 Voitia hyperborea, but with a distinct persistent lid. Several varieties are 

 enumerated which appear to me to be forms passing into each other, thus Mr. 

 Davies' specimens are midway between the ordinary state and Var. piliferum, 

 but the Var. Thornhillii is very different and Mr. Wilson suggests may be a 

 distinct species. 



3. POTTIA HEIMII (Hedw.) Fuernr. 



Autoicous ; taller ; leaves ovate oblong, acuminate, serrate at 

 apex, laxly areolate, nerve vanishing or continuous ; caps, truncate 

 obovate, lid obliquely rostrate, systylious. (T. XXVIII, D.) 



SYN. Gymnostoinum Heimii HEDW. Stirp. cr. i, 80, t. 30 (1787) ; Sp. muse. 32 (1801). ROTH 

 Fl. germ, i, 653 (1788), et iii, P. I, 123. HOFFM. Deutsch. fl. ii, 28 (1795). BRID. 

 Muse. rec. II, P. I, 41 (1798), Sp. muse. I, 32 (1806), Mant. 15 (1819) ; Bry. univ. i, 71 

 (1826'. ROEHL. Moosg. deutsch. 77 (1800) ; Deutsch. fl. iii, 39. SM. Fl. br. iii, 1162 

 (1804) ; Eng. Bot. t. 1951. TURN. Muse. hib. 9 (1804). P. BEAUV. Prodr. 59 (1805). 

 WEB. MOHR Bot. Tasch. 87 (1807). SCHKUHR Deutsch. kr. gew. P. 2, p. 24, t. n 

 (1810). SCHWAEG. Suppl. I, P. I, 21 (i8n). HOOK. TAYL. Muse. br. 12, t. 7 (1818). 

 FUNK Moost. 6, t. 4 (1821). GRAY Nat. arr. br. pi. i, 715 (1851). HOOK. Fl. Scot. P. 

 II, 123 (1821), Br. fl. ii, 9 (1833). HUEBEN. Muse. germ. 42 (1833). MACK. Fl. hib. P. 



2, 10 (1836). 



Bry um Heimii DICKS. Crypt, fasc. II, 4 (1790). GMEL. Syst. Nat. ii, 1333 (1791). LAICH. 



PI. eur. 482 (1794). WITH. Bot. arr. br. veg. 3 ed. iii, 815 (1796). HULL. Br. fl. P. 2, 



257 (!799)- 

 Gymnast, obtusiim (baud HEDW.) TURN. op. c. 9, (excl. syn.) t. i, fig. g-i. Eng. Bot. t. 



1407. BRID. Bry. un. i, 72. 



Gymnast, sy sty Hum FUNK MSS. 



Gymnast, affine NEES HORNSCH. Bry. germ, i, 140, t. 9, f. 9 (1823). BRID. Bry. un. i, 72. 



WAHLENB. Fl. suec. 772. HUEBEN. Muse. germ. 41. 

 Pottia Heimii FUERNR. in Flora xii, P. II, Erganz. 10 (1829). BRUCH SCHIMP. Bry. eur. 



fasc. 18 20, p. 12, t. 7 (1843). RABENH. Deutsch. kr. fl. ii, s. 3, 97 (1848). C. MUELL. 



Synops. i, 551 (1849). WILS. Bry. brit. 96, t. 7 (1855). SCHIMP. Synops. 125 (1860), 



2 ed. 155 (1876). BERK. Handb. br. m. 271, t. 23, f. 3 (1863). MILDE Bry. siles. 97 



