- Dianema andersoni, Morg. MS., non. pub.
Sporangium globose, sessile or sub-stipitate, seated on a thin brownish hypothallus; the wall a thin smooth pinkish membrane, when dry rugulose and iridescent, the inner surface somewhat thickened below and brownish at the base. Capillitium arising out of the thickened base, the threads hyaline or pinkish, ascending, flexuous, simple, or branched a time or two, the extremities attached on all sides to the wall of the sporangium. Spores globose, very minutely warted, pale, pinkish, 10–11 µ, in diameter, free.
Growing on old wood and bark of Alnus; British Columbia, W. B. Anderson.
Sporangium spherical, 6–8 mm. in diameter, sessile or on a very short stipe. This species differs from D. harveyi Rex in the uniform pinkish color of the wall and of the spores; the dividing threads are furnished remotely with minute roundish tubercles as in Didymium; the spores are somewhat larger than in D. harveyi.
B. PERICHÆNACEÆ
Key to the Genera of the Perichænaceæ
| A. Sporangia more or less plasmodiocarpous in type, terete; dehiscence irregular | 1. Ophiotheca |
| B. Sporangia more or less polygonal in outline, or round, depressed; dehiscence circumscissile | 2. Perichæna |
1. Ophiotheca Currey.
- 1869. Ophiotheca pallida Berk. & C., Jour. Linn. Soc., X., p. 350.
Fructification generally plasmodiocarpous, terete, bent or flexuous, often annular or cornuate, rarely globose, opening irregularly, peridium thin, not polished, covered more or less strongly with a distinct layer of scales or granules; capillitium of slender, loosely branching filaments, the surface rough to strongly spinulose; spores yellow.