The Awesome Monotropa Uniflora Post - Tumblr Posts
Ghost pipe - Monotropa uniflora
I made this post about Monotropa uniflora to kick off the spooky season! While this post is not about a type of fungus, I could not resist writing about it. Besides its ghostly (lack of) colour, its dried out seed heads also look akin to pumpkins, which is just awesome!
Monotropa uniflora or ghost pipe does not contain chlorophyll (which gives most plants a green colour) and forms symbiotic relationships with fungi.
Description
The plant is waxy white with some black flecks, but some specimens have been described as having a pale pink colour and verey rarely having a deep red colour. The white variants have black flecks on their stems.
The ghost pipe ranges in height from 5 to 30 centimeters, sheathed with highly reduced leaves 5 to 10 millimetres long, which look akin to scales. These structures are small, thin, translucent and do not have petioles but instead extend in out of the stem.
The stem bears a single flower, which is 10 to 20 millimetres long, with 3 to 8 translucent petals, 10 to 12 stamens and a single pistil. The fruit, an oval capsule-like structure, grows and becomes upright when the seeds mature. After reaching maturity the stem and capsule look dark brown or black with a brittle texture.
The seeds of M. uniflora are small, ranging between 0.6 to 0.8 millimetres long. Once the plant has been pollinated, the seeds are pushed through the petals in a tiny slit and dispersed by the wind.
Unlike most plants, it is white and does not contain chlorophyll. Instead of generating food using the energy from sunlight a.k.a photosynthesizing, it is parasitic, and more specifically a mycoheterotroph. Most fungi are mycorrhizal and through the fungal web of mycorrhizae, M. uniflora roots ultimately tap food from where the host fungi are connected to the photosynthetic trees. The roots of this plant are covered in hairs called cystidia, which allow easy attachment to fungi hyphae. Its hosts are in the Russulaceae family.
Distribution and genetics
M. uniflora is found in three general distribution areas: Asia, North America, and Central and northern South America. DNA analysis has shown that these three populations are genetically distinct from one another. The species has 48 chromosomes.
Ecology
M. uniflora as a mycoheterotrophic plant asscociates with a small range of fungal hosts, all of them members of Russulaceae. It is often found growing neer beech trees in clumps of two or more with its fungal source nearby. Since it is not dependent on sunlight to grow, it can grow in very dark environments like in the understory of dense forests.
It flowers from early summer to early autumn, often a few days after rainfall.
The flowers of the ghost pipe are frequented by various species of bees and flies, most commonly bumblebees. By crawling into the flower for pollen, bumblebees play a role as an important pollen dispersal agent.
References:
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https://www.fs.usda.gov/wildflowers/beauty/mycotrophic/monotropa_uniflora.shtml
Images:
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