Fig. 4

Xylaria delicatula and X. filiformis. A–H X. delicatula (A–D holotype; E–H GS2775 from French Guiana). A, B, E Stromata; mature stroma in A and various immature stages in B. C, F Stromatal surfaces. D, H Ascospores. G Ascal apical ring and ascospores. I–N X. filiformis (I isolectotype BPI 799791; J–N K[M] 169694 from France). I, J Stromata; the isolectotype in I is immature. K, L Stromatal surfaces. M Ascal apical ring and ascospores. N Ascospores. Bars in A, B = 1.25 mm; C, K = 0.5 mm; E = 2.5 mm; F, L = 0.25 mm; I = 5 mm; J = 1 mm; D, G, H, M, N = 5 μm