collegium musicum. a group of usually amateur musicians, often connected with a university, who meet to study and perform chiefly old or little-known music.
Spores and Sporangium. Ferns differ from flowering plants and trees because they do not produce seeds. Instead, ferns reproduce using spores. The sporangium is the structure responsible for producing and releasing spores. Sporangium form in many different ways, sometimes appearing as brown fruitdots on the undersides of leaves. Others grow as slender stalks up from the plant. When the sporangia burst, the wind carries spores to new ground, where they form reproductive structures that, if fertilized, will grow into a new fern.
Sporangia (Clustered in sori). The sporangia is the structure which produces spores. In ferns the sporangia are usually aggregated into particular bigger structures, if you turn over a fern frond and you might see lines and those are aggregations of the sporangia.pores. So a spore is the product of meiosis. In ferns its tiny, if you think of a ruler and think how big a centimetre is and divide that by ten then you've got a millimetre and then divide that by ten again and then halve it that is about the size of the spore.