SYMPLOCA. 303 



Plate CCII, figs. 12-14, specimen from Charlotte, Ver- 

 mont. Habitat not furnished by the collector. 



LYNGBYA INUNDATA, Kg. 



Stratum deep blue green, with a whitish grumous mem- 

 branaceous substratum ; trichomes curved, rather rigid, pale 

 blue green, rarely fasciculate, sheaths narrow, joints shorter 

 than their diameter, dissepiments not granulated, extreme 

 apex straight, obtuse. 



Diameter of filaments, 4 n. 



Syn. Phormidium inundatum, Kg.; Oscillaria autnmnalis, Carm. 



Margins of wayside ditches and the like. 

 Plate CCII, figs. 24, 25. Not infrequent. 



LYNGBYA OCHRACEA, (Kg.) Thur. 

 See Leptothrix ochracea. 



LYNGBYA MUBALIS, Ag. 



Filaments somewhat rigid, thickish, tortuous, very long, 

 interwoven into a bright, grass-green stratum, annuli 

 strongly defined. See Ulothrix murale. 



This plant, originally classified (1824) as a Lyngbi/a, does 

 not, by the term grass-green, belong to this division of algte. 

 It is evidently a Ulothrix, and was so acknowledged by 

 Kuetzing. He called it Hormidiwn murale. Nearly all of 

 Agardh's other species were identified by Harvey (1857), and 

 obtain at this time ; they are marine plants and hence not 

 quoted here. 



Genus 101, SYMPLOCA, Kg. 



Trichomes articulate, simple or only exhibiting the begin- 

 ning of ramification, more or less distinctly sheathed, ascending 

 from a prostrate base, agglutinated together in erect or anasto- 

 mosing fascicles or wick-like clusters, often involved in a 

 matrical gelatin. 



SYMPLOOA LUCIFUGA, Harv. 



Dark aeruginous green, or more frequently dark olive, 

 fascicles 3-4 mm high, approximate, subuliform ; apex at 

 length pennicillate ; trichomes single or twin in a sheath, 

 aeruginous 5 articulations equal or a little longer than broad, 

 granulate ; sheaths broad, pellucid, colorless, smooth, soon 

 disappearing. 



Diameter of trichomes, 3-4 }JL including sheath, 8 yw. 



20 



