10 BRITISH CHAROPHYTA. 



Isle of Wight, from which our plate is taken, to a narrow attenuate 

 form with tapering heads and distant lower whorls found in 

 Dorset. In specimens from the Hamworthy locality collected 

 in April by G. R. B.-W., the branchlets of the lower whorls are 

 much elongated, attaining a length of 5 cm., and resembling in 

 appearance those of Chara Braunii. Several varieties have been 

 described, but the differences are not very appreciable. Some 

 forms from the Mediterranean coast have shorter fruits and the 

 spiral-cells show fewer convolutions than those of the British 

 plant. 



It is with regret that we have felt obliged to adopt the specific 

 name papulosum, instead of the more generally used and much 

 more appropriate name alopecuroides, especially as the former 

 was given by Wallroth under a misapprehension, but the accepted 

 rules of nomenclature do not seem to allow of any other course. 

 See ' Journ. Bot.' liv, p. 336 (1916). 



[Lamprothamnus Hansenii Bonder, from Schleswig- 

 Holstein, apparently differs from L. papulosum in not 

 producing the long dense fruiting heads, in having some- 

 what stouter branchlets, and in the oogonium and 

 oospore being comparatively much broader. The 

 measurements of the former given by Dr. Migula are 

 700 [i. long, 600 [i broad, of the latter 500-550 jj, long, 

 420-460 [i. broad, and the colour of the oospore is stated 

 to be brown. We have not seen a specimen, but the 

 plant is described and figured by Dr. Migula (' Die 

 Characeen,' p. 756, f. 149 ; ' Syn.' p. 67, f. 64). Of 

 Lamprothamnus aragonensis and L. toletanus Prosper also 

 we have not had the opportunity of examining specimens. 

 Judging from the descriptions and illustrations ('Carofit. 

 Bspan.' pp. 91, 95, f. 16a, 17), both would appear to be 

 closely allied to L. papulosum, if not merely extreme 

 forms of that species.] 



Genus 3. CHARA Linngeus. 



' Gen. Plant.' ed. 5, p. 491. 



(Emend. Agardh, Leonhardi & Braun.) 



Stem and branchlets with or without cortex. Stipu- 

 lodes present though sometimes rudimentary. Oogonium 



