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eagle rein orchid, north wind bog-orchid, northern bog orchid, northern green bog orchid, northern green orchid, northern green rein orchid, Sheviak's bog orchid

little club-spur bog-orchid, small green wood orchid

Habit Plants 5–60 cm. Plants 8–47 cm.
Leaves

few–several, ascending to arcuate-spreading, scattered along stem, gradually reduced to bracts distally;

blade oblong to linear-lanceolate, 2.7–23 × 0.4–4 cm.

1(–2), on basal half of stem, ascending to spreading, usually abruptly reduced to bracts distally;

blade oblanceolate to oblong, linear-oblong, or elliptic, 3–19 × 0.8–3.5 cm.

Spikes

lax to very dense.

moderately dense.

Flowers

resupinate, not showy, yellowish green with dull yellowish lip, or more whitish green under cool conditions;

lateral sepals spreading to reflexed;

petals rhombic-ovate- to lance-falcate, margins entire;

lip descending, projecting, or apex adhering to dorsal sepal and petal apices, rhombic-lanceolate to lanceolate, without basal thickening, 2.5–6 × 1–1.5 mm, base not rounded-dilated, margins entire;

spur clavate or sometimes rather cylindric, 2–5 mm, apex usually broadly obtuse;

rostellum lobes divergent, directed downward, very small, rounded, obscure;

pollinaria straight;

pollinia rotating forward and/or fragmenting, loose pollen masses free of anther sacs and trailing downward onto stigma;

viscidia orbiculate;

ovary rather slender to stout, mostly 5–13 mm.

resupinate, often incompletely so and held at angle, not showy, rather inconspicuous pale green to dull yellowish green;

lateral sepals porrect;

petals ovate to obovate;

lip oblong, obscurely 3-lobed, without basal thickening, 3–7 × 3–4 mm, margins sometimes dentate-lacerate, apex truncate;

spur clavate, 7–13 mm;

rostellum lobes directed downward, very short, truncate;

pollinaria straight or slightly curved laterally;

pollinia fragmenting, pollen masses trailing down onto stigma;

viscidia linear to linear lanceolate;

ovary rather stout, 6–11 mm.

2n

= 42.

= 42.

Platanthera aquilonis

Platanthera clavellata

Phenology Flowering May–Aug. Flowering summer (Jun–Aug).
Habitat Wet meadows, tundra, marshes, fens, stream banks, shores, ditches, seeping slopes, roadsides, borrow pits, mesic deciduous forest slopes Sphagnum bogs, sphagnous seeps and meadows, wet sandy and peaty meadows, marshes, low woods, wet prairies, and roadsides
Elevation 0–2500 m (0–8200 ft) 0–2000 m (0–6600 ft)
Distribution
from FNA
AK; CO; CT; IA; ID; IL; IN; MA; ME; MI; MN; MT; ND; NE; NH; NJ; NM; NY; OH; OR; PA; RI; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KY; LA; MA; MD; ME; MI; MN; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NB; NF; NS; ON; PE; QC
[WildflowerSearch map]
[BONAP county map]
Discussion

Flowers of Platanthera aquilonis are usually scentless, but in the far northwest they have a sweet, pungent scent, like that of some related species. The flowers are commonly self-pollinating: the pollinia rotate forward and downward, contacting the stigma, and/or the pollen masses dissociate and are deposited on the stigma as if they had sifted downward.

Platanthera aquilonis is a North American diploid species long confused with the tetraploid Icelandic P. hyperborea (Linnaeus) Lindley. Flowers of both species autopollinate, although the details of the mechanisms may differ. The two species differ in column structure and lip and viscidium shape. True P. hyperborea is similar to P. huronensis, and the relationship of these two species needs further study.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

In common with Platanthera nivea and P. integra, the column of P. clavellata bears a series of lateral projections that are directed forward; the upper pair is elaborately adorned and may be glandular. It appears that this species is inappropriately placed in Platanthera. See note under 30. P. nivea

The broader leaves cited as distinguishing Platanthera clavellata var. ophioglossoides are more prevalent in the North, but occur throughout the range of the species. In some areas populations commonly display a complete range of leaf shape; this feature alone is of no taxonomic significance.

The unusual and infrequent hybrid Platanthera blephariglottis × P. clavellata is P. ×vossii Case.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26, p. 560. FNA vol. 26, p. 570.
Parent taxa Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera
Sibling taxa
P. blephariglottis, P. brevifolia, P. chapmanii, P. chorisiana, P. ciliaris, P. clavellata, P. convallariifolia, P. cristata, P. dilatata, P. flava, P. grandiflora, P. hookeri, P. huronensis, P. hyperborea, P. integra, P. integrilabia, P. lacera, P. leucophaea, P. limosa, P. macrophylla, P. nivea, P. obtusata, P. orbiculata, P. peramoena, P. praeclara, P. psycodes, P. purpurascens, P. sparsiflora, P. stricta, P. tipuloides, P. zothecina
P. aquilonis, P. blephariglottis, P. brevifolia, P. chapmanii, P. chorisiana, P. ciliaris, P. convallariifolia, P. cristata, P. dilatata, P. flava, P. grandiflora, P. hookeri, P. huronensis, P. hyperborea, P. integra, P. integrilabia, P. lacera, P. leucophaea, P. limosa, P. macrophylla, P. nivea, P. obtusata, P. orbiculata, P. peramoena, P. praeclara, P. psycodes, P. purpurascens, P. sparsiflora, P. stricta, P. tipuloides, P. zothecina
Synonyms Orchis clavellata, Habenaria clavellata, Habenaria clavellata var. ophioglossoides
Name authority Sheviak: Lindleyana 14: 193, figs. 1–5. (1999) (Michaux) Luer: Native Orchids Florida, 148. (1972)
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