SPORANGIA:Total height 1 to 3 mm. Sporangia stalked, gregarious or crowded, clavate or turbinate, 0.7 to 1.5 mm. high, shining ochraceous or olivaceous yellow, globose and nearly sessile in irregular developments; sporangial wall membranous, minutely papillose on the inner side, rarely reticulate, yellow, evanescent above, persistent below to form a more or less definite cup.
STALK: Stalk cylindrical, 0.1 to 1.5 mm, long, furrowed or nearly even, olive, reddish brown, or nearly black, filled with spore-like cells,
CAPILLITIUM: an expanding network of yellowish olive, branched threads 5-6 µm diam., with or without free ends, marked with five or six well-defined close or lax sinistral, spiral bands, sometimes spinose in imperfect developments.
NOTES: Very similar to H. calyculata but with a larger spore size and shape of peridium.
SPORES: pale yellow, minutely warted, 7-9 µm diam.
PLASMODIUM: watery white or rose-red.