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Plcellaph. 1. HYDROPHYTiE. 16. Conjugat. 297
XVI. 16. CONJUGATA. Vaucher. Conjugate.
Tliallus threadlike, simple, tubular, jointed ; coupling
parallelly, by a traverse tube, exserted from the middle of
the joints, through which the granules in the joints of one
plant pass into the opposite joint of the other plant, and
there form an ovate spore ; granules forming spiral lines
in each joint.
a. Granules in a s'mgle spiral line.
1 Conjugata quinina. Roman-five conjugate.
Threads equal, slippery, coupling; joints three times as
granules in a single, very close spiral line.
long as broad ;
Conferva quinina, MuUer N. Act. Pctr. 3, 94.
Conferva spiralis, Roth Cat. Dot. 2, V02; Engl. Hot. 1636.
Conjugata quinina, yigardh Disp. ed. 1,27.
Zygnema quininum, Agardh Decad. 2, 26.
Ditches and pools.
Tufts dark green ; joints from once and an half to four
times as long as broad ; spiral angles acute, like the letter
V often repeated.
j3. porticalis. Spire bent like an arched gateway.
Conferva porticalis, Mtiller, ut supra.
Conjugata porticalis, Vaucher, 66.
Zygnema quininum porticale, Lyngbye Hydr. Dan, 173.
y. monstrosa. Tube proceeding from the joints uniting
with the tube proceeding from the next joint of the same
plant.
2. Conjugata hiflata.
Blown conjugate.
Threads
open spire.
here and there inflated; granules in a single
Conjugata inflata, Vaucher, 68.
Conferva sordida. Roth Ft. Germ. 3, 504.
Conferva inflnta, Engt. Dot. 2316.
Zygnema intlatum, Agardh Syn. 101.
Ditches.
Tufts cloudlike, yellowish green ; threads very slender
joints three times as long as broad, thicker in the middle;
spot rarely obsolete.
3. Conjugata longala. Long conjugate.
Threads equal, slippery; joints 6 to 12 times as long ai
broad; granules in a simple, very open spire, forming very
blunt angles.