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Oosporangiums :: Oosporangiums (pl. ) of Oosporangiu.

Oosporangium :: Oosporangium (n.) An oogonium; also, a case containing oval or rounded spores of some other kind than oospores..

Microsporangium :: Microsporangium (n.) A sporangium or conceptacle containing only very minute spores. Cf. Macrosporangium.

Stoma :: Stoma (n.) The line of dehiscence of the sporangium of a fern. It is usually marked by two transversely elongated cells. See Illust. of Sporangium.

Zoosporangium :: Zoosporangium (n.) A spore, or conceptacle containing zoospores..

Macrosporangium :: Macrosporangium (n.) A sporangium or conceptacle containing only large spores; -- opposed to microsporangium. Both are found in the genera Selaginella, Isoctes, and Marsilia, plants remotely allied to ferns..

Spore :: Sporangium (n.) A spore case in the cryptogamous plants, as in ferns, etc..

Oophoridium :: Oophoridium (n.) The macrosporangium or case for the larger kind of spores in heterosporous flowerless plants.

Ring :: Ring (n.) An elastic band partly or wholly encircling the spore cases of ferns. See Illust. of Sporangium.

Sporocyst :: Sporocarp (n.) A sporangium.

Pedicel :: Pedicel (n.) A slender support of any special organ, as that of a capsule in mosses, an air vesicle in algae, or a sporangium in ferns..

Exannulate :: Exannulate (a.) Having the sporangium destitute of a ring; -- said of certain genera of ferns.

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