Sporangia scattered or clustered, globose, or somewhat plasmodiocarpous, .5–1 mm., sessile, coppery iridescent, the peridium thin, opening above irregularly; capillitium of long flexuous, coiling, simple or little dividing threads, nearly smooth, with infrequent attachments to the peridial wall; spores in mass yellowish, transparent under the lens, delicately verruculose, 10–12 µ.
One of the handsomer species of the present group. So far a Pacific coast form. California, Oregon, Washington; reported from Chile.
Dianema Rex
- 1891. Dianema harveyi Rex, Proc. Phil. Acad., p. 397.
Sporangia simple or plasmodiocarpous; capillitium composed of threads without characteristic thickenings running entirely across the sporangium attached both to the base and to the opposite wall, not joined to form a network.
Key to Species of Dianema
| A. Sporangia distinct, iridescent | 1. D. harveyi |
| B. Fructification more or less plasmodiocarpous, dull brown | 2. D. corticatum |
| C. Sporangia, some of them stipitate | 3. D. andersoni |
1. Dianema harveyi Rex.
[Plate XVI]., Figs. 5 and 5 b.
- 1891. Dianema harveyi Rex, Proc. Phil. Acad., p. 397.