CHARA. 461 



brancUets 3 — 5-jointed, lowest joint about as long as the 

 second, invol.-spines needle-shaped long patent or deflexed, 

 bracts whorled 5 — 6 at each joining long equal, nucules with 

 many strife oval. — J. of B. i. t. 7. — Small, upright, opaque, dull 

 greenish brown, 4 in. high. — Coveiing the bottom of shallow 

 brine-pits at Newtown Creek, Isle of Wight. A. Vni. E. 



** Stem coated with as many tubes as there are hranchlets in each 

 whorl. — Hranchlets coated. 



10. C. criitUa (WaUr.) ; dioecious, st. slender coarsely striate 

 thickly beset mth setaceous patent clustered spines, hranchlets 

 short, bracts whorled slender equal, nucules narrowly oblong 

 shorter than the bracts. — Wallr. Ann. Bot. t. 3. — Slender. St. 

 erect, flexible, smooth, densely crowded, slightly branched, pale 

 green. Whorls of 8 — 10 short hranchlets, each of 7 joints with 

 6 bracts at each joining. Nucules solitary with 13 striae and a 

 prominent crown. — Stagnant brackish pools. Burdoch Pool, 

 Falmouth, Cornwall. Garnons. Ballycotton, Co. Cork. Car- 

 roU. A. VII. E. I. 



*** Stem coated with twice as many tubes as there are branchlets 

 in each wliorl, those opposite to the branchlets bearing spines 

 or tubercles, the others not. 



11. C. fcetida (A. Br.) ; monoecious, st. rough finely striate 

 brittle, upper part of the branchlets without external tubes, 

 bracts only on the inner side of the branchlets, four long, twu 

 2 — 4 times as long as the nucules, two equalling them. — C. 

 mdgaris L. (in part). E. B. 336. Atl. Fl. Par. 37.— Diifiise, 

 UPuaUy incrusted. The spinous or tubercular Cprimarv) cortical 

 tubes less prominent than the secondary ones, collapsing when 

 dry so as to place the spines in furrcws. Nucules with 13 strife 

 and a short crown, with the globule. — Ditches and streams. 

 A. VI.— VIII. E. S. I. 



12. C. his'pida (L.) ; monoecious, st. thickened upwards spirally 

 furrowed rough brittle with setaceous spines, branchlets long, 

 bracts whorled (inner ones longer), nucules ovate solitary with 

 a, globule.— -E. B. 436. Atl. Fl. Par. 38 B.— Opaque, greenish 

 white, usually incrusted. St. covered with minute tubercles ,; 

 spines very many, sometimes few. Branches long, acuminate, 

 of 7 joints, with 4 — 5 short bracts at each joining. — a ; spines 

 upon the depressed primary tubes. — ^. C. polyacantha (A. Br.) ; 

 spines upon the elevated primary tubes. Probably a distinct 

 species. — Ditches and pits. /3. Ireland. Isle of Wight. A. 

 v.— VIII. E. S. I. 



13. C. tomentdsa (L.) ; dioecious (?), st. thickened upward.' 



