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Capping 1932. Victoria University College. April 30th, May 2nd and 3rd, 1932.

Dry Rot

Dry Rot.

(To the wrong book unfortunately).

While the ability to produce a fluorescent substance on paper appears to be peculiar to the genius Lolium, a direct fluorescence is exhibited by other plants. Under screened ultra-violet light the roots of oats (avena satira L.) show an intense violet blue, as do to a much lesser degree the rootlets of Danthonia spp. Bromus hordeaceus L., and Bromus unioliodes H.B.K. A faint blue fluorescence has been observed in the rootlets of newly germinated seedlings of all forms of Lolium, but this disappears in a few days. Mature plants of Italian and false perennial, if allowed to root on to filter-paper, show the fluorescent character in the same manner as the seedlings. In strongly fluorescent plants the fluid contents of the roots, and some cases of leaves, when forced out on to filter-paper immediately shows faintly the characteristic blue under the quartz lamp. (Tut! tut! Mr. Printer. Where were you last night?)