460 103. CHAKACE^. 



globose, with 6 — 8 strise, minute but 3 times the diameter of 

 the branchlets and placed outside of them. Globules much 

 larger than the nucules. — Rare. Peaty ditches. Cambridge- 

 shire. A .VII. VIII. -E. 



ii. Tolypella (A. Br.). 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, — Bays of many 

 decreasing Joints. 



7. C. glomerata (Desv.) ; monoecious, st. slender equal flexi- 

 ble transparent, branchlets blunt those fcfrming 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 above the 3 shorter bracts. — C. prolifera 

 Bab. — Small. Nucules small, faintly striate. Granules ses- 

 sile (?). — Apparently my C. Smitkii is not distinguishable, un- 

 less it be really dioecious {H. B. 1703, dissections excluded). — 

 Ditches. Lancing, Suss. Oley, Norfolk. Copford, Essex. 

 A. IV. E. 



8. C. intricata (Roth) ; monoecious, st. slender equal flexible 

 transparent, barren and fertile branchlets of the primary whorls 

 once or twice unequally branched, middle branch longest, branch- 

 lets of axillary branches many densely crowded much subdi- 

 vided into short joints mostly finely pointed, nucules and 

 globules placed at the joinings of the branchlets between the 

 lateral rays. — C. polysperma A. Br. — 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 stiilked, directed downwards, few. Nucules clustered, 

 sessile, directed upwai-ds. — C. Borreri (Bab.) differs by the 

 strongiy muoronate branchlets, those of the primary whorls 

 simple, and in other minute points (A. N. H. 2. v. 87). A. Br. 

 places it here and considers it the true C polysperma TAz. — 

 Running water. Bury St. Edmunds. Cambridge. Dublin. 

 A. IV. E. I. 



II. Chaea X^. — 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. 



* Lychnothamnus (Hupr.). Stem composed of a single tube, 

 smooth, unarmed, flexible, diaphanous. — tnroJucral spines 

 long. Globule by the side of the mtcule abore the bracts, 



9. C. alopecuroides (Del.) ; monoecious, st. rigid opaque, 



