CRYPTOGAMIA. ALGAE, Conferva. (4) Threads 13] 
hairy. é . 
forked hairs, lying one over another. Stems, branches, and 
joints red, the other parts diaphanous. Licurr. 985. 
C. imbricata. Huds. Rocks, stones, and Fucuses in the 
sea. [At Penzance, and at Menabilly, in December. Mr. 
_STACKH. | 
C, Threads branched, jointed : little branches in whirls, verticilla'ta, 
forked, bowed in. Ligurr. 984. Huns. 653. : 
Stems many from the same root. Branches irregular, the 
whole covered with close whirls of fine, short, elastic, forked 
hairs, curving inwards. Licurr. Grows matted together. 
Substance tough and horny. Has the habit of the Lycopodium 
clavatum. Mr. Sracxnouse. 
Among sea rocks in basons of water left by the tides. 
Licutroor. [At Polkerris near Fowey, Cornwall. Mr. Sracx- 
House. | 
- Oss. The first 4 species in this subdivision may be readily 
distinguished by the following circumstances. : 
C. intertexta. Has no mid-rib, hardly an inch long, has the co- 
lour of a sponge and the texture of macerated wash-leather. 
It is much more entitled to the name spongiosa than the 
following. ane 
C. spongiosa. ‘This is 2 or 3 inches high, of a dark brown green, 
has a strong mid-rib tiled-on every side with short, stiff, 
bristle-like threads, so that it much resembles the tail of 
_ a hound. oe 
C. eguisetifolia. "This has been named from its mode of growth 
' resembling some of the Equisetums. It is from 3 to 5 
inches high, of a red clay colour. ‘The jointed mid-rib 
_ is surrounded by whirls of short filaments, but these being _ 
longer than the joints it is entirely covered by them, ; 
C. verticillata.-From :3 to 6 inches high, dark green, branches 
few, forked, mid-rib jointed, whirls of filaments not 
longer than the joints, and not so thick set as in the pre- 
‘ceding, so that the mid-rib is sufficiently visible. In the : 
older plants these filaments become white and opake. : 
} és t ‘< 
_ (5) Threads beaded like a necklace. - 
C. Threads undivided, bristle-shaped, straight ; knots fluviat‘ilis. 
thicker than the threads, angular, ies 
Dill. 7. 47-Vaill. 4, 5—Pluk. 193. 7, cop. in Pet. 106. 6. 3 : 
_ Stems several from one common origin, 3 or 4 inches long, 
thickest below, with few or no branches; spaces between the 
knots, oblong. Smooth, dull brown purple. Dit. 
x 2 
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