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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 .
Chloroplasts (green discs) and accumulated starch granules in cells of Bryum capillare. Botanically, mosses are non-vascular plants in the land plant division Bryophyta. They are usually small (a few centimeters tall) herbaceous (non-woody) plants that absorb water and nutrients mainly through their leaves and harvest carbon dioxide and sunlight to create food by photosynthesis.
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 ...
A tree’s leaf canopy determines the selection of the moss. Where you have a sunnier position over the rest of the garden, maybe you need a shrub or a rock to fill those positions. Soil tests are ...
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]
Ptychomnion aciculare (Greek ptychios meaning ‘folded’, mnion meaning ‘moss’) is possibly the most common form of moss found in wet and rain forests around the southern hemisphere. It grows on ground level, particularly on humus soils, on fallen trees and logs, or as an epiphyte in some instances; often forming vast mats. [ 4 ]
Leaf – the photosynthetic organ of a plant that is attached to a stem, generally at specific intervals. Leaf axils – the space created between a leaf and its branch. This is especially pronounced on monocots like the bromeliads. Leaf buds – buds that produces leafy shoots.
A plant which completes its life cycle (i.e. germinates, reproduces, and dies) within two years or growing seasons. Biennial plants usually form a basal rosette of leaves in the first year and then flower and fruit in the second year. bifid Forked; cut in two for about half its length. Compare trifid. bifoliate