Illinois Natural History Survey - University of Illinois

Platanthera flava
Tubercled orchid, Palegreen orchid, Southern rein orchid
Taxonomy

Synonyms: Habenaria flava, Platanthera flava var. flava, Habenaria scutellata, Perularia flava, Perularia scutellata, Habenaria flava var. flava, Perularia bidentata

Subspecific taxa:

Classification:

Other taxonomic & nomenclature sources: USDA PlantsITISThe Plant ListIPNI

Images

   
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Species Distribution
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County Map Legend
Absent:
Not known from county
Medium confidence:
Medium or unknown confidence;
often old records or unverifiable observations
Medium-high confidence:
Often observations by expert botanists
High confidence:
Often vouchered herbarium records
Planted / introduced:
Native species introduced outside historic range,
or only in planted locations within county (e.g., restorations)
Historic / extirpated:
Only historic records for the species; likely extirpated
(Note that this category is not yet functional)

North American distribution maps for this species: FLNAUSDA PlantsBONAPBISON

Collection & Observation Phenology [?]

J
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F
0
M
0
A
0
M
0
J
0
J
0
A
0
S
0
O
0
N
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D
0

Collection & Observation Timeline [?]

Species Status

Status/Listing: State threatened, Regional Forester Sensitive Species

Notes:Note that the Endangered/Threatened status of this species treats var. flava and var. herbiola as a single entity, but both are rare and distinct enough from one another to warrant consideration on their own.

Origin: Native

Species Description

General: Monocot, perennial

Roots: adventitious, stolons, tubers

Shoots: alternate leaf arrangment; simple leaf type; entire leaf margin; Parallel leaf venation; oblong leaf shape

Inflorescence: spike

Flowers: perfect; 3 merous; complete, irregular; green; epigynous ovary position

Fruit: capsule

Physiology: autotrophic; C3 C02 fixation

Ecology & Natural History

Habitat: Associates with Liquidambar styraciflua, Fraxinus pennsylvanica, Acer rubrum, Quercus shumardii, Ulmus rubra. Possibly also low or level woods in valleys bordering streams and swamps; swales of river bottom prairies.

ILPIN Notes: Possible emergency food-tubers and rhizomes. Does not transplant well. This variety is more southern and has a loose spike and shorter bracts than var. herbiola. Kurz, D.R. and M.L. Bowles. 1981. Report on the Status of Illinois Vascular Plants Potentially Endangered or Threatened in the U.S. Natural Land Institute. Rockford, IL.

Functional Relationships:

  • Pollinators insects (insect)

Human Relationships:

  • Edibility [?] : yes
  • Showy Flowers: medium

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

Coefficient of Conservatism (C-value) [?] :

  • Entire State: 10
  • Chicago Area: 10

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