SUPPLEMENT.] 300 



wanting here, yet its rarity with us is certain, or so conspicuous a plant 

 would before this have rewarded our numerous collectors. The strongly 

 undulated leaves, and serrate, bilamellate nerve at once distinguish it. I 

 hope to give the figure of it in the Supplement to the next volume. 



DICHODONTIUM PELLUCIDUM. 



Var. y. strictum Braithw. 



Stems elongated, densely tufted, straight, slender, fastigiate. i in. high. 

 Leaves distant, very short, at the middle suddenly narrowing with incurved 

 margins, and tapering upward into an obtuse scarcely denticulate point. 

 (T. XLV, F.) 



HAB. Among short grass, Blorenge mountain, near Abergavennv (Mitten 

 1883) ! ! 



The short leaves and close straight stems give this moss an aspect widely 

 different from that of the type, with which however it quite agrees in cell 

 structure. 



ONCOPHORUS (SECT. RHABDOWEISSIA). 

 9. ONCOPHORTTS CRENULATUS (Mitt.) Braithw. 



Autoicous ; in taller lax soft tufts. Leaves patent, ligulate, obtuse, 

 crenulato-serrate in upper half, nerve vanishing at apex, upper cells 

 lax, subquadrate, Caps. oval. (T. XLV, E.) 



SYN. Rhabdoweissia denticulata WILS. in Kew Journ. Bot. ix, 293 (1857). 

 Didymodon crenulatus MITT. Journ. Linn. Soc. i, Suppl. 23 (1859). 



Autoicous; loosely caespitose, more robust than One. crispatus, 

 k i in. high, dull green, dichotomous. Leaves lax patent, flaccid, 

 ligulate, obtuse or pointed, flattish, recurved at apex, crenulato-serrate 

 from middle to apex, nerve vanishing below the point, basal cells hyaline, 

 elongated, upper rounded-quadrate, sub-obscure with the primordial 

 utricle. Perich. bracts similar. Caps, on a short yellow seta, rufous ? 

 oval, sulcate when old, lid rostrate, teeth red, narrow, erect when dry. 



HAB. Wet rocks. Fr. 67. 



Lochgoil head and Ben Voirlich (Hunt 1865) ! ! Beddgelert (Hunt 1865) ! ! Abergynalwyn 

 (Rogers 1879) ! ! Pont Aberglaslyn (Mitten). Cwm Bychan and Tyn-y-Groes (Holt 

 1883)! ! 



This was confused with O. crispatus both in description and figure, the 

 leaves are much broader than in that species, and the upper cells half as 

 large again. The figures O. c. are drawn from O. crispatus. 



