CHARA. 433 



branchlets without bracts. — Atl. Fl. Par. 40 D. — Rather thick. 

 Secondary branchlets once or twice forked, terminal subdivisions 

 rather shorter than the others. " Nucules with 4 or 5 striae." — 

 Marsh ditch, W. Grinstead, Suss. Mr. Borrer. A. VII. E. 



5. C. gracilis (Sm.) ; monoecious, st. slender equal flexible 

 transparent, branchlets in lax whorls repeatedly divided into 3 

 or 4 segments, terminal segments mucronate shorter than the 

 others, globules and nucules each solitary but together at the 

 subdivisions of the branchlets without bracts. — E.B. 2140. R. I. 

 793. Atl. Fl. Par. 41 E. — Small, slender, branching in a lax 

 open manner. Nucules subglobose, with 4 or 6 striae, large in 

 proportion to the plant. — St. Leonard's Forest, Suss. Mr. Borrer. 

 A. IX. E. 



6. C. tenuissima (Desv.) ; monoecious, st. slender equal flexible 

 transparent, branchlets short in dense compact subglobose whorls 

 repeatedly divided into 3 — 7 segments, terminal segments mu- 

 cronate longer than the others, globules and nucules each solitary 

 but together at the subdivisions of the branchlets without bracts. 

 —R. I. 792. Atl. Fl. Par. 41 E. — Very small and slender. 

 Branchlets very much divided, forming little globose compact 

 masses which are often much incrusted. Nucules subglobose, 

 with 6 — 8 striae, minute but 3 times the diameter of the branchlets 

 and placed outside of them. Globules much larger than the nu- 

 cules. — Peaty ditches. Cambridgeshire. A. VII. VIII. E. 



ii. Tolypella. Globules lateral on the joinings of the chief ray 

 of the branchlets between the lateral rays (bracts) which are 

 always shorter than the chief ray. — Rays of many decreasing 

 joints. 



7. C. SmiiHi (Bab.); dioecious, st. slender equal flexible trans- 

 parent, branchlets blunt those forming the primary whorls simple 

 sterile long jointed (?), others on axillary branches many densely 

 crowded having 3 short and 1 long bract at their first joining, 

 globules stalked subtended by the 3 shorter bracts, nucules un- 

 known. — C. nidifica Sm. {not Miill.), E. B. 1703 (principal 

 figure). — Small. Branchlets in bird's-nest-like masses, spring- 

 ing from the axils of the simple branchlets of the primary whorl. 

 — Lancing, Sussex. Mr. Borrer. A. IX. ? E. 



8. C. proUfera (A. Br.) ; monoecious, st. slender equal flexible 

 transparent, branchlets blunt those forming the primary whorls 

 simple sterile long usually of 3 or 4 joints, others on axillary 

 branches many densely crowded bearing 3 short and 1 long bract 

 at their first joining, globules sessile in company with one or 

 more nucules and subtended by the 3 shorter bracts. — Small. 

 Like the preceding. Nucules small, faintly striate. Granules 



u 



