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C. chondrodes is easily mistaken for C. metzleri (described elsewhere). However, the former may be told by the huddled or grouped appearance of the discs. The spores are smaller and clearly ellipsoidal (never ovoid). An additional clue is in the stem of the disc (hypothecium) which narrows to resemble a stalk. Naturally-occurring hard limestone, especially tiered ledges: the Burren, County Clare.
Original text submitted by Vince J. Giavarini