ToRTULACEiE.] 203 [Pottia. 



12. POTTIA WILSONI {Hooh.) Br. ScUmp. 



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 exigunm, creberrimis capsuUs rufis. Dill. Hist, rausc. 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. 18 — 20, Mon. 11, t. 6 (1843). C. Muell, 

 Synops. i, 554 (1849). WiLs. Bry. brit. 95, t. 41 (1855). Schimp. Synops. 124 (i860). 

 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 (1S73). Hobk. Syn. br. m. 

 56 (1873). Lesq. James Mosses N. Amer. loi (1884). 



Gymnast. Coinbce ? De Not. Syll. 286 (1838). 



Entosihymenium mucronifolium Bruch in Flora xii, P. H, 387, t. i, f. 11 (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. 1—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 i86g). 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. — Poift'a m«jto 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 (i860), 



