Apothecia turbinate, pulvinate, slightly longitudinally prolonged, at times al most lens-shaped, sessile or sub-stalked, up to 0.6 mm in diameter, 0.6 mm high, growing in groups of more or less numerous ascocarps, rarely singly; in some cases fixed to the substratum by a scarce, anchoring subiculum. Hymenium gen erally greenish white to blackish green, in some cases reddish brown. Outer sur face smooth, concolorous with the hymenium; margin regular. Flesh jelly and elastic, more or less deep greenish or brownish. In some species apothecia are found together with their conidial stages, showing more or less clavate and concolorous fruitbodies, up to 0.7 mm high, named Dendrostilbella [C. prasi nulus (P. Karst.) Korf et Abawi, a European species, and C. pini A. Funk, an exotic species]; in other cases [C. pleomorphicus Gamundí et Giaiotti and C. pseudo tsugae (J.W. Groves) Ouell. et Piroz., both of them exotic] a pycnidial anamorph may be noted, and finally, e.g. in C. atrovirens (Pers.: Fr.) Korf et Abawi, a Euro pean species, the conidial stage is lacking. Ascospores fusiform or subcylindrical, sometimes slightly curved, with 3-16( 21) more or less marked transversal septa and sometimes one or more longitudi nal ones, smooth, hyaline, irregularly arranged in the ascus; in some cases they may divide into rounded or prolonged secondary spores. Asci normally clavate, inoperculate, 8-spored, amyloid or non-amyloid, originating from croziers. Paraphyses cylindrical, enlarged and forked in the upper part, or slender, often branched, as long as the asci; in some cases an amorphous, dark matter surround ing the apex is notable (epithecium). Excipulum made up of two layers: a gelatinised ectal excipulum of a textura oblita-intricata; a medullary excipulum of a textura intricata immersed in a jelly matrix, occasionally with greenish or brownish pigments and with globose cells up to 12 µm in diameter. Habitat: on decaying and decorticated deciduous or coniferous wood, on cones or resinous exudates; fructifying all year, but mainly in autumn.