Download PDF

Pl.cell.aph. 1. HYDROPHYTE. 6. Scytonema. 287
Conferva radicans, Dillw. Syn. 57 ;
Rocks covered by the sea ; August.
Engl. Bot. 2138.
TiiJ'ts an inch thick ; sporidia globular.
B. Bangide.^. T^a//z^^ tubular, cylindrical, not jointed,
membranaceous, leatherlike, simple or branched; sporidia
elliptical, globular, in several parallel transverse series,
afterwards free, in the tubes.
VII. 7. GIRARDIA. Girard.
Sporidia spherical.
1. Girardia atrovirens. Blackish-green sirard.
Threads branched, stitlt'; branches coriaceous, scattered,
divaricated ; sporidia 3 or 4, in each transveise series.
Lichen pubesccns? Linn. Fl. Suec. 1126.
Conferva atrovirens, Dillw, 25.
Scytonema atrovirens, Agardh Disp. ed, 1, 39.
Cornicularia pubescens, Acharius Syn. Lick. 302.
Eaiigia atrovirens, Lyngbtje Hydr. Dan, 85.
Rocks.
Tufts 3 inches long, black ; threads aggregated, upri'^ht
at bottom, then decumbent, very much bi-anched ; hraiiches
thinner at both ends, spi'eading.
&. prolifera. Threads hispid, spinulose.
Scytonema atrovirens prolifera, Jgardh Disp. ed. 1,39,
Cornicularia pubescens hispid ula, Acharius Syn. Lich. 302.
2. Girardiafuscopurpurea. Brownish-purple girard.
Threads simple, straight, unequally torulose; sporidia
many in each transverse series.
Conferva fusco-purpurea, Dillv:. 92.
Oscillatoria fusco-purpurea, Agardh Disp. ed. 1, 34.
Bangia fusco-purpurea, Lyngbye Hydr. Dan. 83.
Piles and stones in the sea.
Tufts pendulous; threads aggregate, [a quarter of an inch
long, elastic, blunt; sporidia 4 to 10 in eaclj scries.
^. atropurpurea. Threads blackish purple.
Conferva airopurpurea, U/Wio. 103.
Conferva trichodes, Ducltiz. Essai, 30.
Oscillatoria atropurpurea, Agnrdli Syn. 109.
Bangia fuscopurpurea /S, Lyngbye Hydr. Dan. S3.
On piles, just below the surface of the sea.
Holdfasts fibrous.