Note 2236 — I.—PHÆNOGAMOUS OR FLOWERING PLANTS. (continued 18)
Reading edition
There are many other varieties of oak gall, for descriptions of some of which, see Guibourt, Hist. des Drogues, ii. (1869) 292; and for information on the various gall-insects of the family Cynipsidæ and the excrescences they produce, consult a paper by Abl in Wittstein’s Vierteljahresschrift für prakt. Pharm. vi. (1857) 343-361.