Habit, equivalent to habitus in some applications in biology, refers variously to aspects of behaviour or structure, as follows:
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Crustose is a habit of some types of algae and lichens in which the organism grows tightly appressed to a substrate, forming a biological layer. Crustose adheres very closely to the substrates at all points. Crustose is found on rocks and tree bark. Some species of marine algae of the Rhodophyta, in particular members of the order Corallinales, family Corallinaceae, subfamily Melobesioideae with cell walls containing calcium carbonate grow to great depths in the intertidal zone, forming crusts on various substrates. The substrate can be rocks throughout the intertidal zone, or, as in the case of the Corallinales, reef-building corals, and other living organisms including plants, such as mangroves and animals such as shelled molluscs. The coralline red algae are major members of coral reef communities, cementing the corals together with their crusts. Among the brown algae, the order Ralfsiales comprises two families of crustose algae.
Modus vivendi (plural modi vivendi; Latin pronunciation: [ˈmɔ.dʊs wɪˈwɛn.dɪ]) is a Latin phrase that means "mode of living" or "way of life". In international relations, it often is used to mean an arrangement or agreement that allows conflicting parties to coexist in peace. In science, it is used to describe lifestyles.
Modus means "mode", "way", "method", or "manner". Vivendi means "of living". The phrase is often used to describe informal and temporary arrangements in political affairs. For example, if two sides reach a modus vivendi regarding disputed territories, despite political, historical or cultural incompatibilities, an accommodation of their respective differences is established for the sake of contingency.
Raukaua is a genus of flowering plants in the family Araliaceae. It has an austral distribution, being indigenous to southern Argentina and Chile, as well as New Zealand and the island of Tasmania.
Raukaua is a genus of woody plants. They vary in habit: for example R. laetevirens is a small tree, while R. valdiviensis is a liana. Like most of Araliaceae, they have palmately compound leaves. The leaves are heteroblastic, that is, conspicuously different in form from juvenile to adult. R. simplex often produces root suckers and on these, the further the sucker is from the main shoot, the more juvenile the form of the leaves.