LYNGBY, 263 
Symploca Ralfsiana, Kutz. Tab. Phyc. 1, t. 74, f. 4. 
Steel blue or olive becoming blackish, fascicles as much as 
an inch high, densely aggregated, often coalescing, subuliform, 
straight, trichomes pale blue-green or steel blue, densely 
agglutinate, distinctly articulated, somewhat beaded about the 
apices, joints equal or a little longer than broad, cell-contents 
granular, sheaths broad, pellucid, homogenous. 
Sizz. Trichomes -0035--004 mm. diam. 
Rabh. Alg. Eur. ii., 157, \ 
Oscillaria Friesti, Harv. Eng. Fl. v., 373. Harv. Man. 
162. Hass. Alg. p. 259. Mack. Hib. 238. 
Oseillatoria Bangii, Carm. Grev. Fl, Ed. 303. 
Scytonema Bangii, Lyngb. Hydro. Dan. t, 28. 
Over running mosses in shady sub-alpine situation. 
“Stratum 2-3 inches broad, bright wruginous green: Filaments 
closely interwoven into erect elongated tooth-like fascicles, an inch or 
more in height, pale green under the microscope, annulated within, with 
a broad limb or border, well marked by its erect spinulose habit.”— 
Harvey. 
Plate CIII, fig.1. a, portion as seen with a pocketlens. b, trichomes 
x 410. 
Genus 106. PLECTONEMA. Thur. (1875.) 
Filaments branched, ramifications produced by the branching 
of the trichome outside of the sheath, very irregular, and often 
germinate as in Scytonema. 
Plectonema mirabile, Thur. Ann. Sci. Nat. (1875) 377. 
Forming floccose tufts, blue-green, now and then turning 
brownish, trichomes with pseudo-branches usually in pairs and 
parallel; joints shorter than their diameter, granular sheath 
narrow, colourless or yellowish, quite smooth. 
Sizz. Filaments -021 mm. with sheath. 
Born. and Thuret, Notes Alg. ii., p. 185, t. 33. 
Conferva mirabilis, Dillw. Conf. t. 96. 
Calothriz Brebissonii, Kutz. Tab. Phye. ii., t. 30, f. 4. 
Calothrix atrovirens, Harv. Man. 159. 
Calothrix mirabilis, Ag, Syst. 72. Rabh. Alg. Eur. ii., 271. 
Hass. Alg. 2438, t. 69, f. 1. Eng. Fl. v., 369. Harv. Man. 159. 
Elisa mirabilis, Gray. Arr. i., 288. 
In small streams. 
Plate CIV fig. 1. a, portion of trichome x 330. 8, portion with 
w single branch X 330 after Thuret. 
