Pi. cell. aph. 2. THALASSIOPHYT AL. 33. Batrach. 381 
2. Batrachospermum vagum. Vague knot-weed. 
Thallus forked, round, equal; dranches spreading ; twigs 
in whirls, forked, very close; joints ovate, beadlike. 
' Conferva alpina lubrica, filamentis nedosis ezreuleis, Dillen Musc. 
Conferva gelatinosa 5, Huds. Fl. dngl. 598. 
Chara gelatinosa vaga, Roth Germ. }, 127. 
Conferva gelatinosa cerulescens, Wakl, 510. 
Batrachosperma turfosa, B. de St. Vince. dnn Mus. 12, 310. 
Batrachospermum moniliferme vagum, Roth Cat. 3,482. 
Batrachospermum vagum, 4gardh Syn. 123. 
Ponds in boggy soils. 
' Thallus \ess slimy, stiffer and more slender than the 
preceding; not appearing like a row of beads. 
_ B. Hurcuinsipex. Thallus threadlike, main stem solid, 
continuous, jointed or with an internal jointed axis; jozes 
composed of many veins or tubes; iwrgs jointed, joints 
simple or compound; knots mostly coloured; sporidia en- 
closed in a capsule-like theca. — Reddish or greenish; 
mostly marine. 
IX. 34. CLADOSTEPHUS. Agardh. Botilebrush-weed. 
Thallus olive, branched; main filament solid, jointed ; 
twigs jointed, in whirls, mostly simple; joznés simple ; theee 
ovate, peduncied, on the side of the twigs. 
1. Cladostephus verticillatus. Whirl bottlebrush-weed. 
Thallus forked, branched, brownish olive; iwzgs mostly 
2-cut, incurved, in regular whirls, short, tiledlike; jornts 
broader than long; thece elliptical, oblong. 
Conferva verticillata, Lighif. Scot. 984; Dillw. Conf. 55; Engl. Bot 
1718. 
Conferva myriophyllum, Roth Cat. 3,212. 
Cladostephus verticillatus, 4gardh Disp. 26. 
Ceramium verticillatum, De Cand. Fl. Fr. 39. 
Fucus verticillatus, Wulf. Crypt. Gott. 15. 
Sea-coasts. 
Main stem very thick, spreading; thece on the twigs. of 
the old main stem. 
2. Cladostephus spongiosus. Spongy bottlebrush-weed, 
Thallus branched, olive-green; éwigs simple, bent. in- 
wards, scattered, tiledlike; joints little longer than broad ; 
thece reverse-ovate. 
Fucus teretifolius spongiosus pilosissimus, Rait Syn. 46. 
- Fucus hirsutus, Lin. Mant. 134. 
Conferva spongiosa, Huds. Fl. Angl. 596; Dillw, Conf. 42. 
Cladostephus spongiosus, dgardh Disp. 26. 
