Platanthera hookeri

(Torrey ex A. Gray) Lindley

Gen. Sp. Orchid. Pl., 286. 1835.

Basionym: Habenaria hookeri Torrey ex A. Gray Ann. Lyceum Nat. Hist. New York 3(first printing): 228. 1835
Synonyms: Habenaria hookeri var. abbreviata Fernald Platanthera hookeri var. abbreviata (Fernald) W. J. Schrenk
Treatment appears in FNA Volume 26. Treatment on page 555. Mentioned on page 553.

Plants 18–45 cm. Leaves 2, in subequal basal pair, spreading-ascending or lying on ground; bracts 0(–1, very rarely); blade orbiculate, broadly elliptic, or obovate, 5–17 × 4–13 cm. Spikes lax. Flowers resupinate, not showy; calyx green; corolla commonly yellowish green; lateral sepals reflexed; petals narrowly lanceolate-falcate, margins entire; lip projecting to porrect, lanceolate to narrowly lance-rhombic, without basal thickening, 8–23 × 1–6 mm, margins entire; spur slenderly conic, 11–27 mm; rostellum lobes very wide-spreading, angular; pollinaria nearly straight; pollinia remaining enclosed in anther sacs; viscidia suborbiculate; ovary slender to rather stout, mostly 8–20 mm. 2n = 42.

Phenology: Flowering May–Aug.
Habitat: Dry to mesic coniferous and deciduous forest
Elevation: mostly 0–500 m


V26 1129-distribution-map.jpg

Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Conn., Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Ohio, Pa., N.H., N.J., N.Y., R.I., Vt., Wis.


Selected References


Lower Taxa

... more about "Platanthera hookeri"
Charles J. Sheviak +
(Torrey ex A. Gray) Lindley +
Habenaria hookeri +
Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Ill. +, Ind. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Ohio +, Pa. +, N.H. +, N.J. +, N.Y. +, R.I. +, Vt. +  and Wis. +
mostly 0–500 m +
Dry to mesic coniferous and deciduous forest +
Flowering May–Aug. +
Gen. Sp. Orchid. Pl., +
Habenaria hookeri var. abbreviata +  and Platanthera hookeri var. abbreviata +
Platanthera hookeri +
Platanthera +
species +