XOTES OX RADNORSHIRE HEPATICS 195 



*Madotheca Icevigata (SchracL) Dum., H. B.; *M. riviilaris 

 Nees, H. B. 



Lejeunea cavifolia (Ehrh.) Lindb. Cat., H.B.; *L. cavi folia 

 (Ehrh.) var. heterophylla Carr., H. B. 



*3Iarc}iesina Macho ii (Hook.) Gray, H. B. 



^rullania (jermana Tayl. Cat. ; *F. Tamarisci (L.) Dum., H. B.; 

 ¥,fragilifolia Tayl. Cat. 



A set of Mr. Benclorf's specimens has been deposited in the Man- 

 chester Musemn. 



HABITATS OF HYPERICUM HUMIFUSUM. 

 By H. Stuart Thompson, F.L.S. 



Bentham stated in his Handbook of the British Flora that this 

 plant grows " In stony heaths, pastures and bogs, fields and waste 

 places " — a comprehensive group ; Hooker, in The Studenfs Flora, 

 said '* Roadsides, commons, etc. ; ascends to 1100 ft. in Yorkshire "; 

 Babington, often more accurate than either of these greater botanists 

 in his first-hand knowdedge of British plants, gave " Gravelly and 

 heathy places." Mr. J. W. White, whose notes on habitats and 

 similar matters in the Flora of Bristol are the most carefully com- 

 piled of an}^ " Flora " known to me, gives " Native ; on commons and 

 in open woodland. Frequent, but very thinly distributed. There 

 are seldom more than one or two plants at a place." 



Until last year, wdien my work took me daily into the woods of 

 N. Somerset, I had been much struck, especially about Blackdown, 

 Mendip, by the truth of Mr. White's remarks on this pretty little 

 St. John's Wort in the large area treated. But last summer and 

 autumn I found the plant in Somerset on various occasions in con- 

 siderable quantity on " rides " in woodlands, and especially on "rides" 

 and green paths in larch and mixed woods, such as at Wrington 

 Warren (larch 30 years old), Court Hill (Clevedon), King Wood above 

 Cleeve, T^^ntesfield Plantation, and to a less extent in Leigh Woods. 



Just as the recently discovered and rapidly extending Juncus 

 tenuis keeps rigidly and uniformly to the rides and paths in Leigh 

 Woods, so does H. humifusum, as far as my observation goes, rarely 

 stray far from the paths in any of the above woodlands. In like 

 manner Erodium maritimiim, when growing inland in N, Somerset, 

 frequents either the bare limestone rock, as at Goblin Combe, or the 

 shoi't grassy paths on hills, as above Axbridge, Rowberrow and 

 Wrington, and much used " rides " in limestone woods such as those 

 above Clevedon Court and Tyntesfield. It actually grows on the 

 modern brick paving outside the engine-house and saw-mill at 

 Tyntesfield. 



It is interesting to note that whereas all the above-mentioned 

 woods are upon Carboniferous Limestone *, Coste says of H. humi- 

 fusum in France " Champs et coteaux sablonneux des terrains siliceux 

 dans presque toute la France ; rare dans le Midi." Joseph Woods in 

 his Tourisfs Flora also gives merely " Gravel and sand." Taking 



* Though not always of the same Carboniferous Limesftoaie Series ; and parts 

 of certain of these woodlands are on other formations. 



