Berkeley, “On the Fructification of Lycoperdon, &c.,” in “Annals of Natural History” (1840), iv. p. 155.
Wigand, “Morphologie des Genres Trichia et Arcyria,” in “Ann. des Sci. Nat.” 4me sér. xvi. p. 223.
Currey, “On Spiral Threads of Trichia,” in “Quart. Journ. Micr. Science” (1855), iii. p. 17.
In some of the genera, as, for instance, in Badhamia, Enerthenema, and Reticularia, the spores are produced within delicate cells or cysts, which are afterwards absorbed.
Tulasne, “Essai d’une Monographie des Nidulariées,” in “Ann. des Sci. Nat.” (1844), i. 41 and 64.