227. lycopodium clavatum, ii.
"Himalayan Journals V2."
J. D. Hooker
lycopodium densum, living species.
"The Student's Elements of Geology"
Sir Charles Lyell
It may be easily imitated by dusting an ordinary piece of window-glass over with lycopodium, placing a candle near it, and then looking at the candle-flame through the dusty glass from a fair distance.
"Pioneers of Science"
Oliver Lodge