ON CHARA ALOPECUROIDES AS A NATIVE OF BRITAIN. 195 
long. Globule by the side of the nucule (pleurogynous), above the 
bracts. 
C. alopecuroides, Del.; monccious, stem rigid opaque, branchlets 
3-5-jointed the lowest joint about as long as the second, involucral 
spines needle-shaped long patent or deflexed, bracts whorled 5-6 at 
each joining long equal, nucules with many striæ oval. 
C. alopecuroides, Delile, ms.; A. Br.! in Neue Denkschrift. der 
Allgem. Schweitz. Gesellschaft, x. (1849) p. 13 ; Regensburg. Botan. Zeit. 
1849, p. 134; Wallm. in Kongl. Vetensk. Akadem. Handi. 1852, 281; 
Actes de la Soc. Linn. Bord. xxi. 45; Fries! Herb. Norm. xv. 99. 
C. Pouzolsii, Gay, ms. / ; A. Br. in Regensburg. Botan. Zeit. 1835, 
i. 49. 
C. barbata, Fries, Summa Veg. Sc. 60 (non Meyen). 
A small, upright, opaque, dull brownish-green, slightly branched 
plant, usually less than 4 inches in height, but one of Fries's Danish 
specimens is double that length. Stem a simple tube like that of the 
Nitelle. Our artist has vaforibelely not represented the slender 
base of the plant. Involucral spines long, acute, declining.  Whorled 
branches of 3-5 joints, or in some of the lower whorls of one long, 
blunt joint ; all except the uppermost joints much inflated; the very 
last sometimes so small as to be hidden by its own whorl of bracts. 
The whorl of needle-shaped, erect-patent bracts at each joining, and 
the declining ones beneath the branches give this plant almost as 
spinous an appearance as the C. crinita, although its stems are without 
the spines which so abundantly arm that plant. The fertile branchlets 
usually have the lowest joint shorter than the second, although some- 
times the first and second are equally long. The nucules and globules 
are solitary, but together and placed side by side above the whorl of 
bracts, in this respect differing from every other British Chara. The 
nucules are very small, oblong, with many (probably 11) striæ, very 
light-coloured, with the dark idibus showing through the outer coat 
when ripe. 
This plant should be found in brackish water on other parts of our 
coast. It is one of the most interesting additions that has recently 
been made to the flora of Britain. 
EXPLANATION or Prate VII. 
Chara alopecuroides, Del., from specimens collected in the Isle of Wight by 
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