(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.
Example Sentences:
Selaginella
Definition:
(n.) A genus of cryptogamous plants resembling Lycopodia, but producing two kinds of spores; also, any plant of this genus. Many species are cultivated in conservatories.
Example Sentences:
(1) The NMR distinctions of 1-2, 1-3 and 1-4 linked glucopyranosylrhamnopyranosides are discussed and indicate (i) that the 13C NMR assignments for one published gluco(1-3)rhamnoside are in need of modification, (ii) that the published structure of hordenine-O-[6-O-t-cinnamoyl-beta-glucosyl(1-4)-alpha-rhamnoside] from Selaginella doederleinii is not distinguished from the 1-3 linked glucorhamnoside structure, and (iii) that the 8-prenylkaempferol-3-O-[glucosyl(1-4)rhamnoside]-7-O-glucoside and the equivalent 4'-O-methylated xylosyl(1-4)rhamnoside from Epimedium pubescens and E. washanense, respectively, are (1-2)-linked.
(2) A rooted phylogenetic tree based on mutation distances puts Selaginella phytochrome closest to the hypothetical ancestor.
(3) Introns in the Selaginella gene are short and occupy positions known from phytochrome sequences of higher plants.
(4) The 12 other kinds of extracts of Chinese herbs which had a moderate antimutagenic activity against benzo[a]pyrene were: Pteris polyphylla S., Ampelopsis brevipedunculata T., Duchesnea indica F., Gossypium herbaceum L., Lithospermum erythrorrhizon SZ., Artemisia lavendulaefolia DC., Selaginella doederleinii H., Dianthus superbus L., Centipeda minima ABA., Curcuma zedoaria R., Marsdenia tenacissima WA.
(5) Three types of meristems from Selaginella willdenovii were compared.
(6) We have sequenced cDNA and genomic clones coding for phytochrome of the fern Selaginella.