Spiranthes torta (Thunb.) Garay & H.R.Sweet
Southern Ladies' Tresses
Facts About
Accepted Synonyms: Ophrys torta, Spiranthes laxiflora
Spiranthes torta, commonly known as Southern Ladies' Tresses, is found in Bermuda, the Bahamas, West Indies, Mexico, Central America, but is restricted to the rocky pinelands in southern Florida. The leaves are reduced to bracts along the stem and the 2 or 3 basal, linear leaves wither or are absent at flowering time. The inflorescence has small white and green flowers with downward-pointing lateral sepals arranged in a loosely spiraled spike. The labellum, green with a white apex, distinguishes this species from S. tuberosa, a much shorter orchid with pure white flowers. This species blooms in late May-July on dry, rocky pinelands.
Spiranthes torta is apparently secure across its established range but it is extremely rare and endangered in southern Florida.
Pollination
Pollinator information for this orchid has not been reported.
Ecosystem Type
Forests, woodlands
Characteristics
- Habitat:
- terrestrial
- Leaf arrangement:
- basal
- Number of leaves on stem:
- absent
- Form of the labellum:
- the labellum is not pouch-like
- Labellum outline:
- the labellum is simple
- Main color of labellum:
-
- green to brown
- white
- Nectar spur:
- absent
- Inflorescence type:
- the inflorescence is a spike
- Labellum characteristics:
- the labellum is simple
- Labellum length:
- Up to 4 mm
- Sepal length:
- Up to 5 mm
- Plant height:
- 20–50 cm
-
Flowers
- Floral bract length:
- Up to 4 mm
- Flower petal color:
-
- green
- white
- Flower symmetry:
- the flower is zygomorphic
- Flowering date:
-
- May
- June
- July
- Flowers per inflorescence:
- 12–60
- Form of the labellum:
- the labellum is not pouch-like
- Hairs on inflorescence axis:
- the inflorescence stem has at least some hairs with glands
- Inflorescence length:
- 40–100 mm
- Inflorescence type:
- the inflorescence is a spike
- Labellum characteristics:
- the labellum is simple
- Labellum length:
- Up to 4 mm
- Labellum outline:
- the labellum is simple
- Labellum position:
- the flowers are resupinate
- Lower petal strongly red-veined:
- no
- Main color of labellum:
-
- green to brown
- white
- Nectar spur:
- absent
- Number of stamens:
- 1
- Orientation of side petals:
- the lateral petals are declined
- Self-pollinating flowers:
- there are no cleistogamous flowers
- Sepal length:
- Up to 5 mm
- Sepals fused only to sepals:
- the sepals are separate from one another
- Shape of viscidium:
- linear
- Spots on labellum:
- no
-
Fruits or seeds
- Fruit length:
- Up to 4 mm
- Fruit width:
- Up to 3 mm
-
Growth form
- Plant height:
- 20–50 cm
- Roots:
- the rhizomes are non-coralloid
- Underground organs:
- the plant has one or more swollen storage organs underground, such as bulbs, tubers or corms
- myco-heterotrophic or not:
- the plant is chlorophyllous
-
Leaves
- Bract relative length:
- the bract is shorter than the associated flower
- Leaf arrangement:
- basal
- Leaf blade edges:
- the leaf edges are entire
- Leaf blade length:
- 50–200 mm
- Leaf blade length to width ratio:
- 10–40
- Leaf blade shape:
- linear
- Leaf blade tip:
- the tip of the leaf blade is acute
- Leaf blade width:
- Up to 5 mm
- Leaves during flowering:
- leaves are absent during flowering
- Number of leaves on stem:
- absent
-
Place
- Ecosystem type:
-
- forests
- woodlands
- Habitat:
- terrestrial
- 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 | Apparently Secure |
US Status | N/A |
Canadian Status | N/A |
Conservation status for: Florida | |
---|---|
Global Rank | Apparently Secure |
US Status | N/A |
Florida Rank | Highly State Rare |
Florida Status | Endangered |
Canadian Status | N/A |
Wetland Status | Facultative Upland |