On occasion, however, the volva remains underground or gets torn up during development.
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Many mushrooms lack a universal veil and therefore do not have either a volva or volval patches.
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The bulbous stem base is covered with a membranous sac-like volva.
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The volva is thin, smooth and sac-like, although may be quite extensive and contain almost half the stipe.
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Volvariella speciosa has pink spores and no ring or volva.
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Montagnea arenaria is a whitish stalked puffball with a hollow, woody stalk and a loose sac-like volva at the base of the stem.
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As the egg expands, the universal veil ruptures and may remain as a cup, or volva, at the base of the stalk, or as warts or volval patches on the cap.
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Young specimens first emerge from the ground resembling a white egg covered by a universal veil, which then breaks, leaving the volva as a remnant.
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Brittlegills, such as Russula heterophylla, R. aeruginea, and R. virescens, can be distinguished by their brittle flesh and the lack of both volva and ring.
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More examples
Cuplike structure around the base of the stalk of certain fungi
A vu01EBlva or vu01EBlva (Old Norse and Icelandic, respectively; plural forms vu01EBlur and vu00F6lvur), sometimes anglicized vala; also spu00E1kona or spu00E6kona) is a female shaman and seer in Norse religion and a recurring motif in Norse mythology.
Volva is a genus of sea snails, specifically cowry allies or ovulids, marine gastropod molluscs in the family Ovulidae.
The volva is a mycological term to describe a cup-like structure at the base of a mushroom which is a remnant of the universal veil. ...
In Old Norse society, a female practitioner of magic divination and prophecy; any prophetess, sooth-sayer, or witch
A saclike cup or tissue surrounding the stalk base, left after the universal veil has ruptured.
A sac-like structure formed at the base of a stipe, such as that found in Amanita species.
A Nordic practitioner of seidr, spa, galdr, sorcery and prophecy