TORTULACE.E.] 203 [Pottia. 



12. POTTIA WILSONI (Hook.) By. Schimp. 



Paroicous ; in dense round tufts. Leaves octofarious, obovate- 

 oblong, nerve excurrent in a long point ; areolation minute opake. 

 Caps, long, elliptic ; cal. scabrous, lid rostrate. (T. XXIX, F.) 



SYN. Bryum exiguum, creberritnis capsiilis rttfis. DILL. Hist. muse. 347, t. 45, f. 7 A E 



(1741) et Herb. 

 Gymnostomum Wilsoni HOOK. Bot. miscel. i, 143, t. 41 (1830), Br. Fl. 8 (1833). WILS. in 



Eng. bot. suppl. t. 2710 (1834). 

 Pottia Wilsoni BRUCH SCHIMP. Bry. eur. fasc. 1820, Mon. n, t. 6 (1843). C. MUELL, 



Synops. i, 554 (1849). WILS. Bry. brit. 95, t. 41 (1855). SCHIMP. Synops. 124 (1860). 



2 ed. 152 (1876). BERK. Handb. br. m. 270 (1863). LINDB. de Tort. 220 (1864), 



MITT. Journ. Bot. 1871, p. 3. HUSN. Mouss. nord-ouest. 66 (1873). HOBK. Syn. br. m. 



56 (1873). LESQ. JAMES Mosses N. Amer. 101 (1884). 

 Gymnast. Combos? DE NOT. Syll. 286 (1838). 

 Entosthymenium mucronifolium BRUCH in Flora xii, P. II, 387, t. i, f. n (1829), sec. 



Mitten e spec. 



Paroicous ; csespitose, simple, pale glaucous green. Leaves octo- 

 farious, crowded, accrescent upward, erecto-patent, when dry subimbri- 

 cated, lower obovate-oblong, upper broadly oblongo-spathulate with a 

 rounded apex, cuspidate with the longly excurrent nerve, plano-convex 

 with the margin recurved ; cells lax and rectangular at base, above 

 opake, small quadrate, chlorophyllose, strongly verruculose, the two 

 marginal rows larger and more transparent. Cal. fuscescent and 

 scabrous above ; caps, with a distinct neck, oblongo-elliptic, narrower 

 at mouth, glossy castaneous, on an orange seta, twisted to the right 

 when dry ; lid from a convex-conic base, obliquely rostrate, ann. rather 

 broad, of i series of cells ; a rudimentary peristome sometimes present 

 as an irregular papillose membrane. Male inflor. free in the axils of the 

 comal leaves. 

 HAB. Sandy rocky ground ; not common. Fr. i 2. 



Over, Cheshire (Wilson 1828) ! ! Barrow hill, Henfield (Borrer) \ Llanfachlog and 

 Holyhead (Wilson 1830) ! Old wall at Haymarket, Edinburgh. Carnarvon (Valentine 

 1838). Penzance (Curnow 1861) ! ! Marazion bridge (Curnow 1869). West Kirby, 

 Birkenhead (Boswell 1862) ! ! Cawsand Bay (Hunt 1871) ! ! Minehead (Miss Gifford 

 1867) ! Southport (Wild 1876) ! Blackburn (Dr. Wood 1877) ! St. Minver and Mara- 

 zion (Tellam 1879) ! Wrexham (Bowman). 



Best distinguished by its elongated capsule, and the minute opake 

 areolation of the upper part of leaf ; the ripe capsule becomes rugose when 

 dry. The plant from Marazion bridge has longer hair-points, and a tapering 

 apex, composed of narrow incrassate rhomboidal cells. 



13. POTTIA CRINITA Wilson. 



Paroicous ; resembling P. Wilsoni. Leaves octofarious, spathulate, 

 obtuse, the nerve excurrent in a long pale green hair ; cal. smooth ; 

 caps, shorter with a wider mouth, lid obliquely rostellate. (T. XXX, A.) 



SYN. Pottia crinita WILS. MSS. BRUCH SCHIMP. Bry. eur. fasc. 42,1.1(1849). C. MUELL. 

 Synops. ii, 622 (1851). WILS. Bry. brit. 95, t. 41 (1855). SCHIMP. Synops. 125 (1860), 



