412 NOTES ON BRITISH CHAEACE^. 



PI. Crypt. Fr. ii. 324. Lloyd, Alg. Quest Fr. 401. Wartm. & 

 Schenk, Schweiz. Krypt. 250. Jack, Lein. & Stizenb. Krypt. 

 Bad. 205. 



A rather small plant. Stem about •30--48 mm. thick. Inter- 

 nodes 2-4 times the length of the branchlets. Whorls of usually 

 8 primary branchlets with about double that number of smaller 

 secondary branchlets in two series, the one above and the other beiOW 

 the primary branchlets. Primary branchlets 2-3 times divided, 

 the primary rays -^-f the total length of the branchlets. Rays 

 at the first forking 7-10 (of which 1-3 are usually simple) ; at the 

 second forking 4-7, of which 0-2 are again divided into 4-5 

 quaternary rays. Ultimate rays 2-celled, apical cell •09-*14 mm. 

 long, •03--045 broad at the base. Secondary branchlets usually 

 one above and one below each primary branchlet, those of the lower 

 series usually once or twice divided into 4-6 rays, those of the upper 

 usually once divided into 5 rays, or simple. Fruits solitary, occurring 

 on the primary branchlets at the second and third and more rarely 

 at the first forkings, sometimes on the secondary branchlets also, 

 •5--62 mm. long, •38--41 thick, showing 9-10 striae; coronula 

 •075 mm. broad, -045 high ; oospore (unripe) brown, decidedly 

 flattened, about -28 mm. long, -26 thick in the broader diameter, 

 •18 in the narrower. Antheridia occurring at all the forkings, 

 though less commonly at the first, •35-^42 in diameter. Monoecious. 



An extremely beautiful plant, at once distinguished from all the 

 other British species by the presence of the secondary branchlets, 

 being the only European representative of Braun's section Diarthro- 

 dactylcB, heterophyllce. The English plant is a large lax form, which 

 would be included in Braun's var. maxima, though more slender 

 than the Bayonne plant. The species is world-wide in its distri- 

 bution, occurring almost throughout Europe, in Asia, Africa 

 (N, and S.), N. America, and Australasia. It was discovered in 

 Britain in August of the present year by the Rev. G. R. Bullock 

 Webster, growing in some quantity on thick mud in 4-5 feet of 

 water, in The Loe, a lake separated from the sea by a narrow sand- 

 bar, near Helston, West Cornwall. Tab. 392. 



N. TENUissiMA, Kuetz. — Norfolk E., Lopham Great Fen, 1897, 

 G. R. Bullock Webster. This is a very satisfactory record, Lopham 

 being in the same group of fens as Roydon Fen, and we think there 

 is little doubt that Borrer's specimen labelled Roydon Fen, Cambs, 

 was really collected in East Norfolk. 



N. MUCRONATA, Kuctz. — Norfolk W., Little Ouse, near St. John's, 

 1897, and Cambs, Roswell Clay-pits. Ely, 1895, G. R. Bullock Web- 

 ster; Beds, R. Ivel, near Sandy, 1891, J. Saunders. 



N. TRANSLucENS, Agardh. — Bucks, Burnham Beeches, 1897, 

 G. C. Druce; Mid Ebudes, Loch-na-Gile, Tn-ee, 1896, S. M. Mac- 

 vicar; Cork S., Shepperton Lakes, 1896, J. G. 



N. FLExiLis, Agardh. — Hants S., Darkwater, near Exbury, 

 1895, J. G.; Bucks, Brickhill, 1897, G. C. Druce; Salop, Long- 

 mynd, 1897, W. Hunt Painter. 



