The lingual papillae consist of filiform, fungiform, vallate and foliate papillae. Leaf shape may be linear, strap like, oblong, elliptic, lanceolate (lance shaped) or filiform (threadlike). Unlike the other kinds of papillae, filiform papillae do not contain taste buds. Atrophy of filiform and fungiform papillae may also occur. All except the filiform papillae are associated with taste buds. Flowers are small in size, pedicels filiform. The number and size of filiform papillae may be reduced. The exception to this are the filiform papillae that do not contain taste buds. The exception to this is the filiform papillae that do not contain taste buds. As with Hemimerina, they are blind and wingless, with filiform segmented cerci. The classification was based on different morphological characteristics such as filiform ascospores and cylindrical asci. Some marginal florets may have no petals at all (filiform floret). As ephraye mature, the tentacles elongate and become filiform. Filaments filiform or slightly flattened, but sometimes papillose and rarely hairy ("F. karelinii"). It has a filiform (thread-like), perianth tube that is long.