a. Bot. [f. SPORANGI-UM.] Of or pertaining to a sporangium.
1848. Annals Nat. Hist., I. 165. The sporangial frustules of the Diatomaceous plant.
1857. M. J. Berkeley, Cryptog. Bot., 488. The spore-sac is sometimes separated from the columella as well as from the sporangial wall.
1881. Nature, XXIV. 559. In Equisetum the sporangial whorls are naked.
