Difference between revisions of "Platanthera praeclara"
Rhodora 88: 278, figs. 1a–d, 2–4. 1986.
FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 11: | Line 11: | ||
|name=Habenaria leucophaea var. praeclara | |name=Habenaria leucophaea var. praeclara | ||
|authority=(Sheviak & Bowles) Cronquist | |authority=(Sheviak & Bowles) Cronquist | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Orchideae;Orchidaceae (tribe Orchideae) subtribe Orchidinae;Platanthera;Platanthera praeclara | |hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Orchideae;Orchidaceae (tribe Orchideae) subtribe Orchidinae;Platanthera;Platanthera praeclara | ||
| Line 37: | Line 38: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Platanthera praeclara | name=Platanthera praeclara | ||
| − | |||
|authority=Sheviak & M. L. Bowles | |authority=Sheviak & M. L. Bowles | ||
|rank=species | |rank=species | ||
| Line 52: | Line 52: | ||
|publication year=1986 | |publication year=1986 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V26/V26_1154.xml |
|subfamily=Orchidaceae subfam. Orchidoideae | |subfamily=Orchidaceae subfam. Orchidoideae | ||
|tribe=Orchidaceae tribe Orchideae | |tribe=Orchidaceae tribe Orchideae | ||
Revision as of 20:45, 16 December 2019
Plants 38–85 cm. Leaves several to many, ascending, scattered along stem, imperceptibly reduced to bracts distally; blade lanceolate to ovate-lanceolate, to 26 × 5 cm. Spikes lax. Flowers resupinate, showy, creamy white; lateral sepals somewhat porrect; petals flabellate, truncate, sometimes emarginate, apically lacerate; lip descending, deeply 3-lobed, without basal thickening, 17–32 × 20–39 mm, distal margins of lobes deeply incised and fringed, lateral lobes flabellate, sometimes broadly and overlapping middle lobe, middle lobe flabellate, sometimes very broadly, emarginate; spur slenderly clavate, 36–55 mm; rostellum lobes directed strongly forward, wide-spreading, angular; pollinaria geniculate; pollinia directed forward (column appearing hooded), remaining enclosed in anther sacs; viscidia orbiculate; ovary slender, mostly 20–30 mm. 2n = 42.
Phenology: Flowering (May–)Jun–Aug.
Habitat: Mesic to wet prairies
Elevation: 200–800(–1600 m)
Distribution
Man., Iowa, Kans., Minn., Mo., Nebr., N.Dak., Okla., S.Dak., Wyo.
Discussion
Of conservation concern.
In Platanthera praeclara the wide-spreading rostellum lobes separate the viscidia by 6–7.5 mm, whereas in P. leucophaea the short rostellum lobes are more nearly parallel, and the viscidia are separated only by about 1–3.5 mm. These differences are immediately obvious on living material, but the measurements are nearly always impossible in herbarium specimens.
In Wyoming Platanthera praeclara is known from a single, much higher station outside the usual range.
Selected References
None.