. Text-book of botany, morphological and physiological. Botany. CARPOSPOREfi. 3°9. Fig. 204.—Diagrammatic section of the fructification of Ascobolus furfuraceus (after Janczewski); m myce- lium ; c carpogonium; / pollinodium; j ascogenous fila- ments ; a the asci; rp the sterile tissue from which the paraphyses k are developed. a completely developed fructification, I select as an example Ascobolus furfuraceus', a Discomycete described by Janczewski. Fig. 204 represents a vertical section of the entire fructification of this Fungus, whilst still in connection with a portion of the mycelium, a
. Text-book of botany, morphological and physiological. Botany. CARPOSPOREfi. 3°9. Fig. 204.—Diagrammatic section of the fructification of Ascobolus furfuraceus (after Janczewski); m myce- lium ; c carpogonium; / pollinodium; j ascogenous fila- ments ; a the asci; rp the sterile tissue from which the paraphyses k are developed. a completely developed fructification, I select as an example Ascobolus furfuraceus', a Discomycete described by Janczewski. Fig. 204 represents a vertical section of the entire fructification of this Fungus, whilst still in connection with a portion of the mycelium, a somewhat diagrammatically drawn for the sake w ^ ^ of clearness. The carpogonium c and the ?'? \ •''V'~~ ~t^O"-v pollinodium / arise from branches of the my- celium. The former consists of a row of thick short cells, and is considerably curved; the delicate branches of the latter become closely applied to the anterior portion of the carpo- gonium. In consequence of fertilisation, one of the central cells of the carpogonium (which is designated the ascogonium) grows more vigorously than the others, assumes a some- what spherical form, and developes by gem- mation numerous filaments from which, at a later period, the asci are developed. In the meanwhile there has been formed from the hyphae bearing the sexual organs a mass of filaments which completely invests the carpo- gonium, and which forms the large sterile por- tion of the fructification. Its hyphae are so aggregated as to form a pseudo-parenchyma, r in Fig. 204 being the cortical layer, and/^ the internal portion, in which the sterile hyphae are diagrammatically indicated. The ascogenous filaments which have sprung from the ascogonium continue to grow forming a layer ss within the fructification, the subhymenial layer, and send upwards thick club-shaped branches, the asci, within which the spores are developed. In this way the hymenium a a is formed, and it is com- pleted by the upgrowth between the asci of paral
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1882
