298 16. Conjug. 1 . HYDROPHYTE. PL cell. aph. 
Conjugata longata, Vaucher , 71. 
Conferva longata, Dillwyn Syn. 49. 
Conjugata quinina longata, Agardh Disp. ed. 1,27. 
Zygnema longatum, Agardh Syn. 101. 
Ditches and stagnant waters. 
Tufts yellowish green; threads very slender. 
4. Conjugata tumidula. Swollen conjugate . 
Threads here and there swollen ; granules 
Conferva tumidula, Engl. Bot. 1670. 
Ditches and marshes. 
Threads very slender, about one 700th of an inch dia- 
meter ; joints 3 times as long as broad ; spore elliptical. — 
Perhaps a variety of c. inflata. 
b. Spiral lines two in each joint . 
5. Conjugata condensata . Condensed conjugate. 
Threads equal ; joints about as long as broad ; spiral lines 
very close, two in each joint. 
Conjugata condensata, Vaucher , 67. 
Zygnema condensatum, Agardh Syn . 100. 
Ditches. 
Threads crisp, brittle, harsh ; spore spherical. 
6. Conjugata decimina. Roman-ten conjugate . 
Threads equal ; joints 2 or 3 times as long as broad ; 
spiral lines open, 2 in each joint, crossing each other. 
Conferva decimina, Muller N. Act. Petr. 3, 94. 
Conferva nitida, Dillwyn , 4. 
Conferva jugal is, Dillwyn , 5. 
Conferva setiformis lubrica, Roth Cat. 3,267. 
Conjugata decimina, Agardh Disp. ed. 1,26. 
Zygnema deciminum, Agardh Syn. 99. 
Stagnant waters. 
Threads light green, slenderer than in c. nitida; spiral 
lines like X many times repeated. 
7. Conjugata nitida. Shining conjugate. 
Threads equal ; joints about as long as broad ; spiral lines 
very open, many in each joint. 
Conjugata Princeps, Vaucher , 64. 
Conferva nitida, FI. Dan. SI 9 ; Engl. Bot. 2357. 
Conferva jugalis, FI. Dan. 883. 
Conferva scalaris, Roth Cat. 2, 196. 
Conferva setiformis conjugata, Roth Cat. 3,266. 
Conferva multistriata, Roth Cat. 3,271. 
Conjugata nitida, Agardh Disp ed. 1, 26. 
Zygnema nitidum, Agardh Decad. 3, 25. 
