1110 



Art. CCXLIII.— Varieties. 



521. Note on Lastraa TJielypteris. Having seen a notice of Las- 

 traea Thelypteris being found in Yorkshire, in small quantity, I beg 

 leave to state that it is very abundant in two places in this vicinity, — 

 Ascham-bog and Heslington-iield. — Jas. Backhouse, jun.; York, 3rd 

 of 9th Month, 1844. 



522. Note on a locality for Anthemis maritima. On the pebbly 

 part of the ballast-ground near Hartlepool, I lately gathered a single 

 specimen of Anthemis maritima. I believe the only recorded English 

 locality is " Sea-coast at Sunderland." Atriplex rosea and prostrata ? 

 are abundant in the neighbourhood of Hartlepool, and A. marina oc- 

 curs more sparingly. — Id. 



523. Note on a Surrey locality for Ceterach ofjicinarum. I believe 

 that at present there is no habitat recorded for Ceterach officinarum 

 in the county of Surrey ; I may therefore perhaps be allowed to point 

 out to your readers "a local habitation" for this fern within the county. 

 On looking over a collection of ferns, made by a young lady in this 

 neighbourhood, I was much gratified by seeing a frond of Ceterach, 

 which was stated to have been taken from a wall at Haslemere. Feel- 

 ing a desire to verify the habitat, I mentioned the circumstance to my 

 friend Mr. Salmon; and a few days afterwards (April 18, 1844), we 

 together visited the spot — an old wall on the south side of Cow-street 

 — where we found from thirty to forty plants. Of these we contented 

 ourselves with a very few specimens. Mr. Salmon sent a notice of 

 this habitat to Mr. Newman, hoping it might appear in the second 

 edition of the British Ferns ; his note, however, arrived too late, the 

 last pai't of the British Ferns being published a very few days subse- 

 quently. — Henry Bull; Godalming, Surrey, September 13, 1844. 



524. Notes on the change of Colour in the Flowers of the Hydran- 

 gea. Having paid particular attention to the common Hydrangea {H. 

 hortensis) for several years, and during that time having made a varie- 

 ty of experiments with a view of ascertaining the probable cause of 

 the frequent variation of colour so prevalent in that species, I offer 

 the following remarks as the result of my observations. They will, I 

 think, show the fallacy of the statements which have been recorded in 

 various periodicals &c., of changing the large pink heads of blossoms 

 into the fine blue colour, either by growing the plant in a particular 

 soil (some persons say peat or bog soil), or by the addition of chemi- 

 cal agents to the soil : as well as that the blue colour is by no means 

 permanent. When my attention was first drawn to the subject some 



