Search results
Results from the WOW.Com Content Network
In botany, an operculum (pl.: opercula) or calyptra (from Ancient Greek καλύπτρα (kalúptra) 'veil') is a cap-like structure in some flowering plants, mosses, and fungi. It is a covering, hood or lid, describing a feature in plant morphology .
The operculum is long-rostrate, which means it has an apical beak narrowing to a slender tip. [2] [3] [4] Cyathophorum bulbosum is dioicous, meaning that male and females are separate ‘plants’.The life cycle is dominated by the gametophyte stage. There are no other moss species within Australia that look similar.
Polytrichastrum formosum, commonly known as the bank haircap moss, [2] is a species of moss belonging to the family Polytrichaceae. It has a cosmopolitan distribution , found mostly in temperate latitudes in the Northern Hemisphere [ 3 ] and especially dominant in Europe and North America.
The moss produces short, cylindrical and slightly curved capsules which contain the spores. The capsules are 1.7-2.4 mm long and have a lid-like operculum measuring 0.6-0.9 mm. They are borne on reddish-brown stalks which are 1-2.5 cm long. The moss is dioicous, having separate male and female plants.
This articulation of the teeth is termed arthrodontous and is found in the moss subclass Bryopsida. In other groups of mosses, the capsule is either nematodontous with an attached operculum (as in the Polytrichopsida), or else splits open without operculum or teeth. There are two subtypes of arthrodontous peristome. [1]
The Bryopsida constitute the largest class of mosses, containing 95% of all moss species.It consists of approximately 11,500 species, common throughout the whole world. The group is distinguished by having spore capsules with teeth that are arthrodontous; the teeth are separate from each other and jointed at the base where they attach to the opening of the capsule. [2]
It is a dioicous moss, having antheridia and archegonia on different gametophores. Once the archegonia is fertilized the sporophyte generation begins to form. It develops to have a seta six to 14 mm long, and have a capsule two to three mm long, with a one mm operculum. The fully developed capsule will have four peristome teeth attached to the ...
Botanical illustration of Bartramiopsis lescurii. 1 = Plant dry, 2 = Moist plant, with capsule, 3 = Moist plant, without capsule, 4 = Capsule with calyptra, 5 = Mature capsule without operculum, 6 = Leaf showing hairs at margin and lamellae on upper side, 7 = Leaf showing narrower blade and more curved tip, 8 = Leaf tip, upper side, showing lamellae, 9 = Underside of leaf tip,10 = Cross ...