CHAEA. 471 



forming an acute point, stipulodes needleshaped, bracts 6 or 6 

 at each node equal exceeding the oval nucule of 10 — 12 spires. 

 — «/. of B. i. t. 7. — Dark green, 4 — 8 in. high. Not incrusted. 

 —In brine-pits at Newton, Isle of Wight. A. VIII. E. 



** Stem of one central and many cortical tubes (cells), 

 t St. with one row of cortical cells to each hranchlet. Dioecious. 



3. C. crinita (Wallr.) ; st. slender coarsely striate densely 

 beset with setaceous patent cht-stered spines, branchlets 8 — 10 

 short, stipulodes long, bracts 7 — 10 whorled slender equal usually 

 exceeding the narrowly oblong nucules of 10 — 12 spires. — 0. 

 canesoens J. of B. xviii. t. 208. — St. rigid, but little branched, 

 rarely incrusted, pale green. Branchlets stout, 6 — 8-jointed.^ 

 Burdoch Pool near Falmouth. E. 



ft St. with 2 raws of cortical cells to each hrancKkt. — 

 a. Monoecious. 



4. C. fos'tida (Br.) ; st. finely striate, primary cortical cells 

 less prominent than secondary and bearing the few small spines, 

 branchlets 6 — 9 their upper part without cortical cells, stipu- 

 lodes small blunt, bracts on inner side of branchlet exceeding 

 the ovoid nucule of 12 or 13 spires. — E. B. 336. 0. vulgaris L. 

 in part. — Primary cortical cells collapse as they dry and so 

 place the spines in furrows. Very variable ; ( C. longibracteata 

 Kiitz.) branchlets and bracts much longer ; (C. decipiens Desv.) 

 spines many spreading long deciduous, secondary cortical cells 

 very prominent; (C. subvertzcillata Nordst. MS.) branchlets 

 spreading with long upper naked joints, not incrusted and few 

 spines, dark green (hardly C. atrovirens Lowe) ; (C crassicauUs 

 Schl.) stout, branchlets stout coimivent often J naked, bracts 

 short ovate, spines obsolete. — Universal V. VI. E. S. I. 



6. C. contrdria (A. Br.) ; st. finely striate, primary cortical 

 cells more prominent than the secondary and bearing the spines 

 or tubercles ; branchlets 6-9 coated nearly throughout, stipu- 

 lodes blunt, bracts 4 (?) scarcely exceeding the nucules of 12 

 or 13 ."spires and a conical contracted crown. — Much like 

 C fcetida. Spines more acute, ultimately on ridges. — Frens- 

 ham Little Pond, Surrey (1881). Mr. W. H. Beehy. VU. E. 



6. C. his'pida (L.); st. stout thickened upwards rough 

 spirally striate, secondary cortical cells larger and more promi- 

 nent than the primary, many setaceous spreading spines, branch- 

 lets 7 — 9-iointed, stipulodes prominent, bracts on both sides rf 

 the branchlet 8 — 10 exceeding the ovoid nucules of 10 or 11 

 spires. — B. B. 463. — Usually very large, much incrusted. 



