Page:The Journal of Indian Botany.djvu/193

 belonging to a same species. The colour of the fungus changes, but variations are always uniform according to the age of the culture.

General Colour of the Culture. The colour of this fungus is white platre during the first 24 hours; on the second day a slight greyish tone is noticed, on the fourth the culture assumes a light marine blue, on the sixth it becomes greyish blue, on the 8th the greyish tone is predominant and the culture presents a beautiful gris souris colour. From the first to the second week the colour changes into a deep brownish, passing through a slightly violet tone. Later on the culture is of a deep chocolate colour, which two months later becomes very clear.

Morphology and Mycological appearance—The morphology of the fungus is the same as noted in the general description of the fungi belonging to these genera. The following elements call forth our attention:—

Coaidiophores—length maxim. 650 micr., minim, 112; average taken on 35 conidiophores 275 micr.; breadth 3 to 6 micr.; wall thickness 0, 5 to 1 micr.

Columellae almost always ovoid and claviform, very seldom spherical. When old, they show a brownish pigmentation, more concentrated in the superior pole. Diameter of the spherical type 8 to 15 micr. Ovoid : length maxim. 25 minim. 10, average taken on 4-1 columellae, 13 micr. ; breadth maxim. 20, minim. 4, average taken on the same number 10, 5 micr.

Sterigmata very densely inserted, generally on the anterior : t of the columella, rarely radiated. In old cultures a deep brownish pigmentation is noticed. Primary Steriymata ovoid or claviform, 5 to 10 micr. long, 3 to 4 micr. broad. Secondary Sterigmata ovoid or lanceolated 5 to 8 micr., long, 3 to 4 micr. broad.

Conidia round, finely punctuated, bluish green at first, light brown at a latter stage, finally chocolate colour; 2, 5 to 5 micr.

Heads (Columella + Sterigmata + Conidia) round and elliptical. Diameter of the round forms; maxim. 55, minim. 36, average 42 micr. Dimensions of the elliptical forms : length maxim. 80, minim 10 average taken on 20 heads 45 micr.

Perithecium yellow with a greenish tone, found only in old cultures aged at least two months; 30 to 35 micr. of diameter.

Cultural characters. Plain agar. Good development, the cultures having the following coloration : 48 hours, white platre; 3 days greyish; 5 days, slight bluish tone; 9 days, gris souris; 2 weeks, chocolate brown ; 3 weeks, deep chocolate ; 2 months, clear chocolate; 3 months, idem.

Glucosed sabouraud — Idem, very good development, the colours being more vivid.