Key to the Genera of the Tubiferaceæ
| A. Spores olivaceous; sporangia in one or several series, | 1. Lindbladia |
| B. Spores umber; sporangia in a single series | 2. Tubifera |
| C. Sporangia stipitate; capillitium of tubular threads | 3. Alwisia |
1. Lindbladia Fries
- 1849. Lindbladia Fries, Sum. Veg. Scand., p. 449.
Fructification æthalioid; the sporangia short, tubular, sometimes superimposed, sometimes forming a simple stratum, in the latter case generally sessile, but sometimes short-stipitate, the peridium at first entire, at length opening irregularly either at the sides or apex, beset with granules; spores olivaceous.
This genus was established by Fries in 1849 to accommodate a single species of wide distribution and somewhat varying habit, which is neither a tubifera nor yet a cribraria and offers points of resemblance to each. It is distinct in that the sporangia, while often in single series, are yet often superimposed. It resembles Tubifera in its simple sporangia, opening without the aid of a net; it is like Cribraria in the smooth ochraceous-olivaceous spores and granuliferous peridium.
1. Lindbladia effusa (Ehr.) Rost.
[Plate I.], Figs. 3, 3 a, [Plate XII.], Figs. 1, 2.
- 1818. Licea effusa Ehr., Sylv. Myc. Ber., p. 26.
- 1875. Lindbladia effusa (Ehr.) Rost., Mon., p. 223.
- 1879. Perichaena caespitosa Peck, Rep. N. Y. Mus., XXXI., p. 57.
Sporangia minute, either closely combined and superimposed, so as to form a pulvinate æthalium, or crowded together in a single layer, sessile, or short-stipitate; the peridia thin, membranous, marked by scattered plasmodic granules, often lustrous, sometimes dull lead-colored or blackish, especially above; stipe, when present, very short but distinct, brown, rugulose; hypothallus well developed, membranous, or more or less spongiose in structure; spore-mass ochraceous, under the lens, nearly smooth, almost colorless, 6–7.5 µ.