Isotria medeoloides

(Pursh) Rafinesque

Fl. Tellur.4: 47. 1838

Common names: Small whorled pogonia orchid
Synonyms: Pogonia affinis
Basionyms: Arethusa medeoloides
Found in FNA Volume 26. Treatment on page 512.
Herbs, singly or rarely in small clumps, short-rhizomatous, 4–25 cm. Stems pale grayish green, glaucous; scales 2–4, near soil line, white to light green. Leaves pale grayish green; blade elliptic-obovate, 17–85 × 8–40 mm, apex acuminate, glaucous when young. Flowers subsessile, without nectar and fragrance; sepals arching, green to light green, linear-oblanceolate, 12–25 × 2–3 mm; petals light green, oblanceolate, 12–18 × 2–4 mm; lip light yellowish green to pale greenish white, streaked with green, obovate, 11–16 × 4–5 mm, lateral lobes narrowly triangular, margins involute, middle lobe rounded, margins slightly revolute, undulate; callus yellowish green, longitudinal, becoming elongate, with fleshy, wartlike papillae toward apex; column 8–10 mm; ovary 10–15 mm; rostellar flap reduced. Capsules 12–28 × 2–10 mm; pedicel of mature capsule elongating to 5–17(–20, rarely) mm. 2n = 18.

Phenology: Flowering May–Jun; capsules mature fall.
Habitat: Acidic soils, in dry to mesic 2d-growth, deciduous or deciduous-coniferous forests, typically light to moderate leaf litter, open herb layer (occasionally in dense ferns), moderate to light shrub layer, relatively open canopy, frequently on flats or slope bases near canopy breaks
Elevation: 30–1000 m
Facts about "Isotria medeoloides"
AuthorLoyal A. Mehrhoff + and Michael A. Homoya +
BasionymArethusa medeoloides +
Common nameSmall whorled pogonia orchid +
Elevation30–1000 m +
HabitatAcidic soils, in dry to mesic 2d-growth, d
Acidic soils, in dry to mesic 2d-growth, deciduous or deciduous-coniferous forests, typically light to moderate leaf litter, open herb layer (occasionally in dense ferns), moderate to light shrub layer, relatively open canopy, frequently on flats or slope bases near canopy breaks
on flats or slope bases near canopy breaks +
IllustratorBarbara Alongi +
PhenologyFlowering May–Jun + and capsules mature fall. +
Referencebrumback1988a +, dyer1986a +, mehrhoff1989a +, mehrhoff1989b +, oettingen1992a + and paulos1985a +
SynonymPogonia affinis +
Taxon nameIsotria medeoloides +
Taxon parentIsotria +
Taxon rankspecies +
VolumeVolume 26 +