306 THE JOURNAL OF BOTANY 



Bamalina cusjpidata Nyl. 0, L, B U, N U. — f. gracilis Oliv. 

 U. — f . riogosa Oliv. N-iu U. — Var. crassa Nyl. to H. On 



red granite. — f. lobulifera Harm. to H. On red granite. 



B. incequalis Nyl. N U. — B. scopulorum Ach. 0, BU, H, N U. 

 — Yar. incrassata Nyl. to H. — B. subfarinacea Nyl. N U, B U. 

 Chiefly on walls exposed to a drive of wind. 



Thamnolia vermicularis Schaer. B H. Scattered among 

 Bhacomitrium lanuginosum. 



Alectoria jubata Nyl. 0. On rocks not far from the sea, but 

 away from highest tidal influence. 



Placodium imcrorum Leight. subsp. P. decijneiis (Arn.). 0, L. 

 — P. sympagea (Ach.). L, U. On Serpentine. 



Leproloma lanuginosum Nyl. N U. 



Blastema ferruginea (Huds.) Arn. var. f estiva Nyl. NU, S U. 



(Xanthoria) Physcia parietina De Not. 0, E H, L, Sc, N U, 

 B U. On Serpentine. — Var. ectanea Nyl. B U. On Serpentine. 

 — (X) P. lychnea Nyl. L. Abundant on rocks much frequented 

 by gulls, along with a Prasiola (not yet examined). This latter 

 genus and the Xanthoria section of Physcia, together with Ulva, 

 seem to always demand a greater nitrogenous supply than most 

 other cellular plants, excepting Fungi and Splachnacese. 



Buellia disciformis Mudd. B U. On Serpentine. — B. myrio- 

 carpa Mudd. 0, U. In both places saxicolous. 



Physcia aquila Nyl. U, 0, L. — P. ccesia Nyl. to H. — 

 P. stellaris Nyl. var. leptalea Nyl. B H. — P. speciosa Nyl. 0, 

 B U.— P. tenella 'i^yl B U. On Serpentine. 0.—P.ulothrix^y\. 

 var. virella Sm. 0. 



A REMAEKABLE FOEM 

 OF DICBANELLA HETEBOMALLA Schimp. 



By H. N. Dixon, M.A., F.L.S. 



In May of this year Mr. C. P. Hurst sent me a gathering of 

 Dicranella which presented a very unusual appearance. The 

 foliage was unmistakably that of D. heteromalla, but the capsules 

 were quite unlike those of that species. Instead of being elon- 

 gate, castaneous brown, inclined, and plicate when dry, on long 

 straw-coloured setae, they were short, small, deep reddish brown, 

 almost erect and symmetrical, smooth when dry, wide-mouthed, 

 and on very short, red, often deep red, setae, so as to be almost 

 immersed in the tufts. They presented indeed very much the 

 appearance of the fruit of D. varia, and this was enhanced when, 

 as was occasionally the case, the peristome, just expanded, showed 

 the long, deep purple teeth characteristic, of some forms especially, 

 of that species. There seemed to be a good a priori case for a 

 hybrid form, viz., D. heteromalla 2 X D. varia S . Careful 

 search by Mr. Hurst, however, entirely failed to detect the 

 presence of D. varia in the immediate vicinity, while on the other 

 hand it showed that the fruiting plant in question covered a much 

 wider range than was at first supposed. It was originally found 

 along the side of a trench on Burridge Heath, half a mile east of 



