340 



even in these I can find only two branches at any one joint. 1 will 

 describe one of the best marked of these. Height 22 inches, of which 

 2j inches is black, having been buried in the ground to that depth, 

 and rather more. At 2^ inches two opposite branches (a a) shoot out, 

 with rooted hases. At the next joint are two other opposite branches 



B 



(b b) placed at right angles to the first pair a * a with respect to the 



B 



axis. At the next joint are two other opposite branches, as in a a, 

 and at the next joint is another opposite pair, as in b b. The right 

 branch, a, at the seventh joint, has two branches, which are contigu- 

 ous or nearly so (not opposite), and two more at the ninth in the same 

 condition; two opposite ones at the tenth joint, one branch having 

 the same direction as the two lower branches. In this specimen the 

 main stem is broken off" at the height of seven inches ; the second 

 primary pair of branches has also one branch ramified, but less re- 

 markably so than the one which I have already given in detail." 



Mr. Moore's specimens of the Dublin plant were accompanied by 

 the following note. " There is a third plant* which claims attention, 

 it occurs near Dublin, growing in water, upright, and to a much great- 

 er size than E. variegatum in its usual state, and it possesses the other 

 characters noticed in Hooker's ' British Flora,' 4th edition, p. 394, f 

 as distinguishing the plant found by Mr. Wilson at Muckruss. This 

 species or variety, whichever you please to call it, appears to adhere 

 to its natural habit when subjected to cultivation, under which state 

 I have had it about six months, and the new fi-onds are getting much 

 stronger than those which the plant produced naturally. Although 

 entirely removed from the water it grows quite erect, and continues 

 smoother, with the same number of striae." I do not agree with my 

 much-esteemed correspondent in thinking the Dublin and Muckruss 

 plants identical, still the Dublin plant is very different from the usual 

 variegatum form, and nearly resembles the specimens from Kincar- 

 dineshire already alluded to. Edward Newman. 



(To be continued). 



* The usual forms of Mactaii and variegatum are the other two plants noticed in 

 Mr. Moore's letter. 



t " At Mucruss Mr. Wilson finds this plant growing in water and upright to thrice 

 that size [6 — 8 inches long], with a ston smoother, about 10-furrowed and more po- 

 lished in the furrows, and the sheaths not so conspicuously nor so constantly furnished 

 with acumin.ited teeth or summits as is usual in the ordinary state of the plant.'' — Br. 

 Fl. ed. 4. .304. 



