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Platanthera macrophylla
(Goldie) P.M. Brown
Family:
Orchidaceae
Greater Round-Leaf Orchid
[
Habenaria macrophylla
Goldie]
FNA
Resources
Gustavo A. Romero-González, Germán Carnevali Fernández-Concha, Robert L. Dressler, Lawrence K. Magrath & George W. Argus in Flora of North America (vol. 26)
Plants 23-63 cm. Leaves 2, in subequal basal pair lying on ground; bracts (very rarely, 0-)1-6, scattered along stem; blade broadly elliptic, orbiculate, or oblate, 7-24 × 5-19 cm. Spikes lax. Flowers resupinate, rather showy; calyx mostly greenish white; corolla mostly white; lateral sepals reflexed to somewhat spreading; petals lanceolate-falcate, margins entire; lip descending to somewhat reflexed, linear-oblong to linear-lanceolate, without basal thickening, 10-23 × 1-2.5 mm, margins entire; spur slenderly clavate, 28-46 mm; rostellum lobes directed strongly forward, wide-spreading, angular; pollinaria nearly straight, (4.6-)4.7-6.8 mm; pollinia remaining enclosed in anther sacs; viscidia orbiculate; ovary slender to rather stout, mostly 16-29 mm.
Flowering Jun--Aug. Mesic to wet coniferous and deciduous forest; mostly 0--1000 m; N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que.; Conn., Maine, Mass., Mich., Minn., N.H., N.Y., Pa., Vt.
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This project made possible by National Science Foundation Awards
1601697
,
1600981
,
1601393
,
1600976
,
1601429
,
1601101
,
1601503
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