GRIMMIACE.E.] 23 [Grimmia. 



Autoicous ; laxly and irregularly pulvinate or sub-csespitose, robust, 

 the plants readily falling asunder, dark brown or black at base, 

 yellowish-green passing to gray above. Stems shorter, suberect, or 

 longer, ascending from a procumbent base, repeatedly dichotomous, 

 dense-leaved, with hardly any radicles. Leaves when moist recurved, 

 then patulous and curved upward at point, fuscous-green, long, from 

 an oblong concave base, elongato-lanceolate, carinate above, gradually 

 passing into a very rough hair, the margin here and there reflexed, the 

 perich. bracts sheathing to middle ; cells at base linear elongated, 

 rectangular at angles, with 3 — 4 rows at margin quadrate and hyaline, 

 median longish, apical small, opake, roundish-quadrate, all more or less 

 sinuose ; nerve broad, channelled, bistratose. Caps, on a yellowish 

 cygneous pedicel, elliptic and obovate, 8-plicate, pale fuscescent with a 

 red mouth ; lid ^ length of caps., purple, with a straight beak ; calyptra 

 small, many-lobed, annulus broad, revoluble ; teeth purple, bifid, the 

 legs unequal, erecto-patent when dry. Male infl. gemmaceous, axillar, 

 bracts ovate, acute. 

 Hab. — Siliceous rocks. Not uncommon. Fr. 4 — 5. 



Clova (Drummond) . Argyleshire (Carmlchael). Plymouth and Penzance {Tozer). 

 Anglesea, Conway and Breiddin hills (Wilson 1833) ! ! Stenton rocks and Dunsinane 

 {Dr. B. White 1865) ! By river Cad, Shaugh bridge and Dewerstone rocks (Holmes 

 1866) ! ! Robin Hood's Bay, Yorks. (Masse^ ! Cader Idris (Whitehead 1879) ! Ben 

 Aan, New Galloway (McAiidrew). The Scalp, Dublin (Orr). Luggielaw, Fairhead 

 and Connemara (Moore). IVIourne Mtns. (Lett 1887) ! ! Slieve Donard (Lett 1884). 



Var. p. robusta (Ferg.) 



Stems straight, dichotomous, little branched. Leaves shorter, narrower, 



with a narrowed yellowish base, the basal cells shorter, firmer, the upper less 



sinuose smaller and more opake, the hair-point nearly smooth. 



Syn. — Grimmia robusta Ferg. Mss. Braithw. in Journ. Bot. 1872, p. ig6, t. 124. Hobk. 

 Syn. br. m. 80 (1873). 



Hab. — Limestone and granite rocks. 



Glen Callater and Glen Phee, Clova (Fergusson 1868) ! ! Gairloch head (Hunt) I Near 

 Cardross and Bowling (Stirton 1864). Ballater (Dickie 1869). Connemara (Moore 1863). 

 Dean and Start point, Devon (Holmes). Slieve-na-Maddy, Down (Lett 1885). 



This species is readily known by its robust habit and very dense long 



leaves with long rough silky points, it is nearly allied to G. elatiov and also to 



G. trichophylla, but differs from both by the autoicous inflorescence. The Var. 



rohusta is a more slender plant, with shorter hair-points, and differs somewhat 



in the areolation, but this varies considerably, especially in the degree of 



sinuosity of the cell-walls. 



17. GRIMMIA ELATIOR Bruch. 



Dioicous ; robust, laxly csespitose. Leaves elongato-lanceolate, 

 from a broader base, deeply canaliculate-concave, with the margin 

 revolute below, gradually attenuated into a smoothish hair. Caps, on a 

 short arcuate seta, oval, lo-striate, lid rostellate. (T. XLIX, C.) 



