Growing on old wood and mosses. Sporangia .4-.5 mic. in diameter, the elaters varying greatly in length, some not more than 20 or 30 mic. long, others more than 100 mic. in length.
B. Spores minutely warted.
5. Oligonema fulvum, Morgan n. sp. Sporangia rather large, subglobose, sessile, closely crowded and more or less irregular; the wall tawny yellow, very thin and fragile, smooth, shining and iridescent. Mass of capillitium and spores tawny yellow; elaters simple or sometimes branched, mostly very short, 4 mic. in thickness, sometimes with thicker swollen portions; the surface marked with low smooth spirals, in places faint and obsolete; the extremities rounded and obtuse, usually with a very minute apiculus, 1–3 mic. in length. Spores globose, minutely warted, 10–13 mic. in diameter.
Growing on an old effused Sphæria. Sporangia .6-.8 mm. in diameter, the elaters mostly 40–80 mic. in length, rarely much longer and sometimes shorter; the longer elaters and those that are branched often arise from confluence of the shorter ones.
- Fig. 13.—Perichæna depressa, Lib.
- Fig. 14.—Ophiotheca Wrightii, B. & C.
- Fig. 15.—Lachnobolus globosus, Schw.
- Fig. 16.—Arcyria Cookei, Massee.
- Fig. 17.—Arcyria minor, Schw.
- Fig. 18.—Heterotrichia Gabriellæ, Massee. (After Massee.)
- Fig. 19.—Hemiarcyria plumosa, Morgan.
- Fig. 20.—Hemiarcyria funalis, Morgan.
- Fig. 21.—Calonema aureum, Morgan.
- Fig. 22.—Trichia fallax, Pers.
- Fig. 23.—Trichia scabra, Rost.
- Fig. 24.—Oligonema flavidum, Peck.
Note.—Each figure exhibits the sporangium as it appears magnified about 100 diameters, and the capillitium and spores magnified about 500 diameters.
The Journal of the Cin. Soc. Natural History
Vol. XVI. Plate I.