Insular Southeast Asia – Hermetospheres

An under-researched plant family

Usually, when I place a new plant in a new hermetosphere, I want to know its identification down to species level. I have several reasons for this. In most cases, identifying the species is a prerequisite for obtaining information about its natural habitat. This information is helpful to assess whether or not a plant is…
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The olive-coloured begonia

First collected presumably in 1979 and scientifically described 10 years ago, Begonia olivacea is established in the terrarium plant trade by now, both as potted plants or seed. According to the recommendations for cultivation given by the nurseries, the hermetosphere is bound to provide the perfect conditions for the plant. It is described as lithophytic…
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Succeeding generations (3): Ludisia discolor

If hermetospheres are supposed to last over years, it is advantageous to work with plants that are able to produce offspring under the particular restrictions given (a.o. limited space, unlikely pollination). The terrestrial orchid Ludisia discolor has its own way of ensuring offspring in the absence of pollinators. The key to this type of vegetative propagation…
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Brooks’ Selaginella: Plant knowledge as a by-product of colonial politics

The history of the discovery and first description of Selaginella brooksii is, as is often the case with tropical plants, also a history of colonial activities by European states. The story of S. brooksii is far from unique, but it is exemplary and therefore worth telling here.
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The orchid flower that lost its symmetry

The ‘jewel orchid’ Ludisia discolor is common in culture, and reports from fellow hermetosphere enthusiasts as well as the description of the orchid’s natural habitat made me confident that it would also thrive in the closed container. My experience so far has proved me right. Jewel orchids are cultivateed mainly for their patterned leaves and…
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A fern with conspicuous white spots

Why does my fern Selliguea albidosquamata show a large number of white dots on the margins and upper side of the leaf blades? Some research revealed a likely explanation.
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The perfect fern

This creeping fern, most likely Davallia parvula, meets all the criteria for a perfect hermetosphere plant: small size, slow growth, robustness and delicate beauty.
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The ‘good’ Begonia

It is only ten years since this plant was given a scientific name. Nevertheless, it is already popular with plant lovers, especially for its rosette of maroon to dark malachite-green bubbled leaves covered with magenta hairs and its bright white flowers. The special appearance of the plant was one of the reasons why the authors…
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Jewels of the closed terrarium?

Since the times of the ‘plant hunters’ of the colonial era, orchids have held a special fascination for plant lovers. Only a small proportion of tropical orchids live with roots anchored in the soil (terrestrial), far more live as epiphytes on other plants. They obtain moisture and nutrients from the precipitation water that runs down…
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Acclimation (4): Labisia sp.

Previous entries in this blog (#1, #2, #3) have already discussed the observation that some plants change their habitus after being planted in a closed container, presumably from “ordinary” greenhouse conditions. This is another example. The plant is marketed under the name Labisia sp. ‘Boyan’, and its natural habitat is stated as Borneo. However, in…
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Category: Insular Southeast Asia