. Comparative morphology of Fungi. Fungi. 240 COMPARATIVE MORPHOLOGY OF FUNGI Somewhat higher stands the Brazilian, H. pezizoidea forming cup- shaped pezizoid fructifications in whose interior are embedded the perthecia. Higher still is H. poronioidea in which the stromata, as in the agarics, are differentiated into a stipe and pileus and on whose upper surface are embedded the perithecia. Highest of all are Podostroma alutacea and P. comu-damae. P. alutacea grows through the whole north temperate zone, forming a vertical clavate fructification (up to 3 cm. high), which divides into a sterile
. Comparative morphology of Fungi. Fungi. 240 COMPARATIVE MORPHOLOGY OF FUNGI Somewhat higher stands the Brazilian, H. pezizoidea forming cup- shaped pezizoid fructifications in whose interior are embedded the perthecia. Higher still is H. poronioidea in which the stromata, as in the agarics, are differentiated into a stipe and pileus and on whose upper surface are embedded the perithecia. Highest of all are Podostroma alutacea and P. comu-damae. P. alutacea grows through the whole north temperate zone, forming a vertical clavate fructification (up to 3 cm. high), which divides into a sterile stipe and a narow clavate head (Fig. 155, 1). Externally it appears like Xylaria of the Sphaeriales or Clavaria of the Basidiomycetes (Atkinson, 1905). In the Thibetan P. comu-damae, the 10-cm. high fructifications are branched like a staghorn and appear deceptively like the <n&^ Fig. 155.—Hypocrea alutacea. Habit and section through a fructification. (Natural size; after Tulasne.) In another direction has developed the genus, also belonging to the Didymosporae, Corallormjces, whose best-known representative, C. Jatrophae, is parasitic in Brazil on Aipim (Manihot, Jatropha Aipi). Its fructifications are rarely more than 3 mm. high and are differentiated into a pure white, flat, at times patelliform disc and into a red stipe fading towards the top (Fig. 156, 1 and 2). On this disc are at first cut off an enormous number of hyaline, falcate Fusarium conidia held by a watery excretion in the form of a milk-white drop (Fig. 156, 4); with the slightest shaking the drop flows off but another is formed in the course of a few hours. At times the edges of the disc grow further towards the sides in irregular folds; thereby arise flat, ruffled covers (Fig. 156, 5), which may attain a cross section up to 1 cm. and (as in Hypocrea rufa) hide the stipe. Under certain conditions of nourishment, the conidia may arise not only on those patelliform fructifications, but al
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