Practical
Plants

Microtis unifolia

Onion-Leaf Orchis

a perennial member of the Microtis genus in the family Orchidaceae.

No photo available

Taxonomy and growth

Life cycle
perennial
Height
0.5 m
Fertility
Insects
Flower type
hermaphrodite
Pollinators
Insects

Uses

Edible uses

This section contains historical Plants For A Future notes marked noncommercial.

Root[7][8][1][2]. No more details are given.

Plant part
Root

Environment

Range
E.Asia to Australasia from China, Indonesia and the Phillipines to Australia and New Zealand.
Habitat
Open places such as on banks and in poor pastures in North, South, Stewart and Chatham Islands[6].
Light
full sun
Shade tolerance
light shade
Water
moderate
Hardiness
Zone 9+
Soil textures
sandy, loamy, clay
Soil pH
acid, neutral, alkaline
Tolerates Nutritionally Poor Soil
No
Drought
intolerant

Propagation

This section contains historical Plants For A Future notes marked noncommercial.

Seed - surface sow, preferably as soon as it is ripe, in the greenhouse and do not allow the compost to dry out. The seed of this species is extremely simple, it has a minute embryo surrounded by a single layer of protective cells. It contains very little food reserves and depends upon a symbiotic relationship with a species of soil-dwelling fungus. The fungal hyphae invade the seed and enter the cells of the embryo. The orchid soon begins to digest the fungal tissue and this acts as a food supply for the plant until it is able to obtain nutrients from decaying material in the soil[3]. It is best to use some of the soil that is growing around established plants in order to introduce the fungus, or to sow the seed around a plant of the same species and allow the seedlings to grow on until they are large enough to move.

Cultivation

This section contains historical Plants For A Future notes marked noncommercial.

We have very little information on this species. It is a terrestrial orchid that can tolerate light frosts and so could possibly be grown outdoors in the mildest parts of Britain, but its late autumn flowering habit might make it more suited to the greenhouse. The flowers have a powerful if sickly scent[5]. Orchids are, in general, shallow-rooting plants of well-drained low-fertility soils. Their symbiotic relationship with a fungus in the soil allows them to obtain sufficient nutrients and be able to compete successfully with other plants. They are very sensitive to the addition of fertilizers or fungicides since these can harm the symbiotic fungus and thus kill the orchid[4].

References

  1. Brooker. S. G., Cambie. R. C. and Cooper. R. C. Economic Native Plants of New Zealand. Oxford University Press 1991-00-00 ISBN 0-19-558229-2

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  2. Crowe. A. Native Edible Plants of New Zealand. Hodder and Stoughton 1990-00-00 ISBN 0-340-508302

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  3. Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992-00-00 ISBN 0-333-47494-5

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  4. Cribb. P. & Bailes. C. Hardy Orchids. Orchids for the Garden and Frost-free Greenhouse. Christopher Helm. London. 1989-00-00 ISBN 0 7470 0416 1

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  5. Genders. R. Scented Flora of the World. Robert Hale. London. 1994-00-00 ISBN 0-7090-5440-8

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  6. Allan. H. H. Flora of New Zealand. Government Printer, Wellington. 1961-00-00

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  7. Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959-00-00

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  8. Usher. G. A Dictionary of Plants Used by Man. Constable 1974-00-00 ISBN 0094579202

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