Bulbophyllum pachyrachis (A.Rich.) Griseb.
Rat Tail Orchid
Facts About
Accepted Synonyms: Pachyrhachis pineliana, Pleurothallis pachyrachis
Bulbophyllum pachyrachis, commonly known as the Rat Tail Orchid, is distributed in the West Indies, Central America, and South America and south Florida. This orchid has short, sessile pseudobulbs that are attached to a creeping rhizome. One or two glossy leaves develop at the apex of the pseudobulb, and the inflorescence, a simple raceme, emerges from the base of the pseudobulb. The inflorescence has up to 30 small greenish-brown flowers spotted with purple and the labellum is red. This orchid was known to occur on hardwood hammocks in the Fakahatchee Swamp but has not been seen in Florida since 1975 and is presumed extirpated.
Bulbophyllum pachyrachis is apparently secure across its somewhat large range although this orchid is considered endangered in Florida, and the single known population in Florida no longer exits.
Ecosystem Type
Swamps, woodlands
Characteristics
- Habitat:
- epiphyte
- Number of leaves on stem:
- two
- Form of the labellum:
- the labellum is not pouch-like
- Labellum outline:
- the labellum is simple
- Main color of labellum:
- pink to red
- Nectar spur:
- absent
- Inflorescence type:
- the inflorescence is a spike
- Labellum characteristics:
- the labellum is simple
- Labellum length:
- 2–3 mm
- Sepal length:
- Up to 7 mm
-
Flowers
- Floral bract length:
- 3–4 mm
- Flower petal color:
-
- brown
- green
- purple
- Flower symmetry:
- the flower is zygomorphic
- Flowering date:
-
- November
- December
- Flowers per inflorescence:
- Up to 30
- 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:
- 40–250 mm
- Inflorescence type:
- the inflorescence is a spike
- Inflorescence width:
- 2–7 mm
- Labellum characteristics:
- the labellum is simple
- Labellum length:
- 2–3 mm
- Labellum outline:
- the labellum is simple
- Labellum position:
- the flowers are resupinate
- Length of narrowed base of lower petal:
- 2–3 mm
- Lower petal strongly red-veined:
- no
- Main color of labellum:
- pink to red
- 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 7 mm
- Sepals fused only to sepals:
- the sepals are separate from one another
- Spots on labellum:
- no
-
Fruits or seeds
- Fruit length:
- Up to 8 mm
- Fruit width:
- Up to 5 mm
- Seed capsule orientation:
- the capsule points upwards or outwards
-
Growth form
- Epiphyte form:
- pseudobulb
- Pseudobulb leaves:
- leaves emerge from the top of the pseudobulb
- Pseudobulb shape:
- ovoid
- Pseudobulb size:
- Up to 5 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
- Features of leaves:
- the leaf is pleated along its length
- Leaf blade edges:
- the leaf edges are entire
- Leaf blade length:
- Up to 150 mm
- Leaf blade shape:
-
- oblanceolate
- oblong
- Leaf blade tip:
- the tip of the leaf blade is acute
- Leaf blade width:
- Up to 20 mm
- Leaves during flowering:
- leaves are present during flowering
- Number of bracts on stem:
- anything
- Number of leaves on stem:
- two
-
Place
- Ecosystem type:
-
- 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 | Apparently Secure |
US Status | N/A |
Canadian Status | N/A |
Conservation status for: Florida | |
---|---|
Global Rank | Apparently Secure |
US Status | N/A |
Florida Rank | Presumed Extirpated |
Florida Status | Endangered |
Canadian Status | N/A |
Wetland Status | N/A |