PL cell, aph. 2.THALASS10PHYTYE. 33. Batrach. 331 
2. Batrachospermum vagum. Vague knot-weed . 
Thallus forked, round, equal; branches spreading ; twigs 
in whirls, forked, very close ; joints ovate, beadlike. 
Conferva alpina lubrica, filarnentis nodosis caeruleis, Dillen Muse. 
Conferva gelatinosa 8, Huds. FI. Angl. 598. 
Chara gelatinosa vaga, Roth Germ. 1, 127. 
Conferva gelatinosa caerulescens, Wahl, 510. 
Batrachosperma turfosa, B. de St. Vine. Ann Mus. 12, 310. 
Batrachospermum moniliforme vagum, Roth Cat. 3,482. 
Batrachospermum vagum, Agardh Syn. 123. 
Ponds in boggy soils. 
Thallus less slimy, stiffer and more slender than the 
preceding ; not appearing like a row of beads. 
B. HutchinsidEzE. Thallus threadlike, main stem solid, 
continuous, jointed or with an internal jointed axis; joints 
composed of many veins or tubes; twigs 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. Bottlehrush-weed. 
Thallus olive, branched ; main filament solid, jointed ; 
twigs jointed, in whirls, mostly simple; joints simple; thecae 
ovate, peduncled, on the side of the twigs. 
1. Cladostephus verticillatus . IVhirl lottlel rush-weed. 
Thallus forked, branched, brownish olive ; twigs mostly 
2-cut, incurved, in regular whirls, short, tiledlike; joints 
broader than long; thecae elliptical, oblong. 
Conferva verticillata, Light f. Scot. 984 ; Dillw. Conf. 55 ; Engl. Bot 
Conferva myriophyllum, Roth Cat. 3,212. 
Cladoslephus verticillatus, Agardh Disp. 26. 
Ceramium verticillatum, De Cand. FI. Fr. 39. 
Fucus verticillatus, Wulf. Crypt. Gott. 15. 
Sea-coasts. 
Main stem very thick, spreading ; thec-ae on the twigs of 
the old main stem. 
2. Cladoslephus spongiosus. Spongy lottlelrush-weed. 
Thallus branched, olive-green ; twigs simple, bent in- 
wards, scattered, tiledlike; joints little longer than broad; 
thecae reverse-ovate. 
Fucus teretifolius spongiosus pilosissimus, Raii Syn. 46. 
Fucus hirsutus, Lin. Mant. 134. 
Conferva spongiosa, Huds. FI. Angl. 596; Dillw. Conf. 42. 
Cladostephus spongiosus, Agardh Disp. 26. 
