Epidendrum amphistomum A.Rich.
Dingy Flowered Star Orchid
Facts About
Accepted Synonyms: Epidendrum amphisotomum f. rubrifolium, Epidendrum secundum subsp. briegeri
Epidendrum amphistomum, the Dingy Flowered Star Orchid, is distributed in the West Indies, Central America, northern South America and Florida. This orchid has 5-13 elliptic leaves that alternate on the stem. The flowering period is January to July but flowers may develop at any other time of year. It produces up to 25 green to brownish flowers on a compact terminal raceme. Flowers produce a fragrance reminiscent of overly ripe vegetables, heaviest between late afternoon and dawn. The labellum has a distinct central ridge. In south Florida, this orchid grows in swamps and hammocks, often in disturbed habitats that no longer support other orchids.
Epidendrum amphistomum is considered endangered in Florida although its conservation status has not been determined across its entire range.
Pollination
This orchid is pollinated by nocturnal male moths including Cisseps fulvicollis, Lymire edwardsii, Nelphe carolina and Oxydia vesulia. Although this orchid does produce nectar, moths may be initially attracted to these flowers between late afternoon and dawn by their strong fragrance similar to very ripe vegetables.
Ecosystem Type
Shrublands or thickets, swamps, woodlands
Characteristics
- Habitat:
- epiphyte
- Leaf arrangement:
- alternate
- Number of leaves on stem:
-
- five
- six
- seven or more
- Form of the labellum:
- the labellum is not pouch-like
- Labellum outline:
- the labellum is lobed
- Main color of labellum:
-
- green to brown
- yellow
- Nectar spur:
- absent
- Inflorescence type:
- the inflorescence is a raceme
- Labellum characteristics:
- the labellum is lobed
- Labellum length:
- 4–6 mm
- Sepal length:
- 5.5–7.5 mm
- Plant height:
- Up to 110 cm
-
Flowers
- Floral bract length:
- Up to 5 mm
- Flower petal color:
-
- brown
- green
- yellow
- Flower symmetry:
- the flower is zygomorphic
- Flowering date:
-
- January
- February
- March
- April
- May
- June
- July
- Flowers per inflorescence:
- Up to 25
- Form of the labellum:
- the labellum is not pouch-like
- Hairs on flower stalk:
- the pedicel is hairless
- Hairs on inflorescence axis:
- the inflorescence stem is hairless
- Inflorescence length:
- 100–500 mm
- Inflorescence type:
- the inflorescence is a raceme
- Labellum characteristics:
- the labellum is lobed
- Labellum length:
- 4–6 mm
- Labellum outline:
- the labellum is lobed
- Labellum position:
- the flowers are non-resupinate
- Length of peduncle:
- 90–480 mm
- Lower petal strongly red-veined:
- no
- Main color of labellum:
-
- green to brown
- yellow
- Nectar spur:
- absent
- Number of stamens:
- 1
- Orientation of side petals:
-
- the lateral petals are erect
- the lateral petals are spreading
- Self-pollinating flowers:
- there are no cleistogamous flowers
- Sepal length:
- 5.5–7.5 mm
- Sepals fused only to sepals:
- the sepals are separate from one another
- Spots on labellum:
- no
-
Fruits or seeds
- Fruit length:
- Up to 15 mm
- Fruit width:
- Up to 10 mm
- Seed capsule orientation:
- the capsule bends downwards
-
Growth form
- Cane or stem length:
- 20–60 cm
- Epiphyte form:
- erect or pendent cane
- Plant height:
- Up to 110 cm
- Roots:
- the rhizomes are non-coralloid
- myco-heterotrophic or not:
- the plant is chlorophyllous
-
Leaves
- Bract relative length:
- the bract is shorter than the associated flower
- Leaf arrangement:
- alternate
- Leaf blade edges:
- the leaf edges are entire
- Leaf blade length:
- 40–180 mm
- Leaf blade length to width ratio:
- 4–4.5
- Leaf blade shape:
- elliptic
- Leaf blade tip:
- the tip of the leaf blade is obtuse
- Leaf blade width:
- 10–40 mm
- Leaves during flowering:
- leaves are present during flowering
- Number of leaves on stem:
-
- five
- six
- seven or more
-
Place
- Ecosystem type:
-
- shrublands or thickets
- swamps
- woodlands
- Habitat:
- epiphyte
- Location:
- Florida
-
Facts and Uses
- Mycorrhiza
- Monitoring
- Propagation
- Restoration
Native to North America
Yes
North American Conservation Status & Distribution
Conservation Status
Conservation and Wetland Status | |
---|---|
Global Rank | N/A |
US Status | N/A |
Canadian Status | N/A |
Conservation status for: Florida | |
---|---|
Global Rank | N/A |
US Status | N/A |
Florida Rank | Watch List |
Florida Status | Endangered |
Canadian Status | N/A |
Wetland Status | N/A |