. Botany of the living plant. Botany. (a) ASCOMYCETKS 433 commonest are readily distinguished by tiieir stature an<I colour Low-growmg, velvety, blue-green patches are Penicillium cmstaceum ' coarser, olive-green patches, with mop-like heads, of size ^ ' to the naked eye, are Aspergillus (Emotium) herbariorum \ patches of the latter grow older, minute yellow specks may app- dust of dwelhngs, and this accounts for the constant appf------ r'f. Fig. 366. Conidiophores of Aspergillus herbariorum (to the left) and of Penicillium cruttatmm ' (to the right.) (From Strasburger.) Highly
. Botany of the living plant. Botany. (a) ASCOMYCETKS 433 commonest are readily distinguished by tiieir stature an<I colour Low-growmg, velvety, blue-green patches are Penicillium cmstaceum ' coarser, olive-green patches, with mop-like heads, of size ^ ' to the naked eye, are Aspergillus (Emotium) herbariorum \ patches of the latter grow older, minute yellow specks may app- dust of dwelhngs, and this accounts for the constant appf------ r'f. Fig. 366. Conidiophores of Aspergillus herbariorum (to the left) and of Penicillium cruttatmm ' (to the right.) (From Strasburger.) Highly magnified. the Moulds on organic substrata where the conditions are favourable to their growth, as in the moist air in a close cupboard or unricr a bell-jar. If a sample of Aspergillus be taken, the branched and .septate mycehum is seen to ramify over and penetrate into the organic substratum, deriving nourishment till able to propagate. Stout branches then rise upright as conidiophores, which swell upwards into a spherical head. On this numerous conical sterii^miUa l)ud forth, each giving rise to a chain of conidia, formed in basipelal succession. The oldest is distal, and successively others are abstricted off : an arrangement which provides for the due nourishment of each, and the ready removal of those that are mature by any breath of air; for these minute polynucleate bodies are very lightly attached (Fig. 366). They germinate readily in water or damp air, and the 13. B. 2 K. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
