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HYPNUn FLUITANS VAR. ATLANTICUH REN. 



From the Journal of Botany, August, 1901. By H. N. Dixon. 



" A plant collected somewhat extensively by Mr. J. A. Wheldon and' 

 Mr. A. Wilson in Lancashire, on elevated moorlands and again by Mr. 

 W. Ingham in Yorkshire has for some time given rise to discussion. Its^ 

 short nerve, the secund, wide leaves, shortly and broadly pointed, the loose 

 areolation and very indistinctly defined auricles, gave it a very different 

 character from that usually obtaining in this species. Under his somewhat 

 heterogeneous group 'a obsoletum,' Sanio has described a var. Hollerih.o.Y- 

 ing very nearly the same characters, and M. Renauld at first referred our 

 plants to this, ranking them under var. Jeanbernati as f . Holleri Sanio. In 

 a letter recently received from him, however, he writes : ' This determination 

 is strictly correct: however, as the var. Holleri Sanio is badly conceived and 

 described, and as the group obsoletiim Sanio is, besides, very confused, I 

 prefer now to make a new variety which should be placed beside, the var. 

 Jeanbernati 'R.Qn.' For this variety M. Renauld proposes the name Atlan- 

 ticum, and has drawn, up the following description : 



" Hypnum FLUITANS L. {aviphibium) var. Atlanticum Ren. A form 

 similar to the var. Jeanbernati Ren., from which it differs in the green color, 

 chlorophyllose cells; larger oval leaves abruptly narrowed into a short acu- 

 men; nerve a little broader (58-64/« instead of 46-48//); basal areolation looser,, 

 medium cells broader and shorter." 



"Habitat: England: R. Wyre, West Lanes., coll. Albert Wilson, 1900, 

 (Weldon, No. 9) Summit of Pendle Hill, Lanes., alt. 600m. coll. J. A. Weldon, 

 July, 1898." "France: Meymac (Correze), alt. 900m. coll. Lachenaud, 1901." 



" Yovrrn. gracilis Ren. Plants more slender, leaves smaller but of the 



same shape as the type, nerve narrower and areolation looser than in the 



vox. Jeanbernati.'" "Habitat: England: Arncliffe, Wood, Yorkshire, 1900, 



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In August last I collected a variety of Hypmcin Jluitans on the ground 

 under the spruces on the summit of Mt. Mansfield, Vt. Specimens were 

 sent to M. Renauld who at once pronounced them to be the var. Atlanticum. 

 It will be issued as no. 103 of N. American Musci Pleurocarpi. A. J. Grout. 



In Prof. Holzinger's article in the January Bryologist on Seligeria tri- 

 sticha B. & S. he says: "A plant collected by Dr. G. G. Kennedy in Con- 

 necticut at first referred to Seligeria calcarea seems to belong rather to this 

 species." I collected the plant June 13, 1896, on the ledges of Willoughby 

 Mountain, Vermont, and suppose that my label must have misled Prof, Hol- 

 zinger. I find that I write Vt. with a very round V instead of an acute- 

 angled V and therefore my Vt. was read Ct. I sent a packet of the moss to 

 General Paris in Dinard, France, and he listed Seligeria calcarea (Dicks)' 

 Bry. Eur. in the Index Bryologicus as found in Vermont. For fear that 

 some student of the distribution of our mosses may think that it has also 

 been found in Connecticut, I hasten to say that my specimen was from 

 Vermont and I do not know of any Connecticut specimen. Geo. G. Kennedy. 



