434 102. chakacejE. 



sessile (?). The presence of true bracts distinguishes this 

 species, C. Borreri, and C. Smithii from C. polysperma and 

 C.flexilis.— Ditches. Cley, Norfolk. Copford, Essex. A. IV. 



E. 



9. C. Borreri (Bab.) ; moncEcious, st. slender equal flexible 

 transparent, branchlets strongly mucronate those of the primary 

 whorls simple sterile long jointed, others on axillary branches 

 many densely crowded bearing 3 short and 1 long bract at their 

 first and sometimes second joining, globules stalked or sessile in 

 company with several nucules and subtended by the 3 shorter 

 bracts.— C. nidifica Borr., E. B. S. fol. 2762, note. See A. N. H. 

 ser. 2. V. 87. — Like but larger than Nos. 7 and 8. Branchlets 

 suddenly contracted below the acute apiculus. Larger " bract " 

 occasionally bearing a cluster of bracts. — Marsh ditch, Henfield, 

 Sussex. Mr. Borrer. A. VIL E. 



10. C. polysperma (A. Br.) ; monoecious, st. slender equal 

 flexible transparent, barren and fertile branchlets of the primary 

 whorls once or twice unequally branched, middle branch longest, 

 branchlets of axillary branches many densely crowded much sub- 

 divided into short joints mostly finely pointed, nucules and glo- 

 bules placed at the joinings of the branchlets between the lateral 

 rays. — Small. Branches with 2 or 3 ascending branchlets, often 

 again branched, at their first joining; often but not always 

 there is a simple branchlet beneath and at right angles to the 

 main branch at that point. Globules stalked, directed down- 

 wards, few. Nucules clustered, sessile, directed upwards. — 

 Running water. Bury St. Edmonds. Cambridge. Dublin. A. IV. 



E.I. 



11. Chara Ag.^ — Crown of the nucule of 5 cells forming a 

 single circle, sometimes spreading, persistent. Stems usually 

 coated with smaller tubes. — Granule taking the place of one of 

 the bracts. A double row of spines at the base of each whorl. 



"" Stem coated with as many tubes as there are branchlets in each 

 whorl.- — Branchlets coated. 



11. C. cn?ii<a (Wallr.) ; dicecious, st. slender coarsely striated 

 thickly beset with setaceous patent clustered spines, branchlets 

 abbreviated, bracts whorled slender equal, nucules narrowly ob- 

 long shorter than the bracts. — Wallr. Ann. Bot. t. 3. — Slender. 

 St. erect, flexible, smooth, densely crowded, slightly branched, 

 pale green. Whorls of 8 — 10 short branchlets, each of 7 joints 

 with 6 bracts at each joining. Nucules solitary with 13 striae 

 and a prominent crown. — Stagnant brackish pools. Burdoch 

 Pool, Falmouth, Cornwall. Rev. W. L. P. Garnons. A. VIII. 



E, 



