Difference between revisions of "Spiranthes magnicamporum"
Bot. Mus. Leafl. 23: 287, plate 22. 1973.
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|publication title=Bot. Mus. Leafl. | |publication title=Bot. Mus. Leafl. | ||
|publication year=1973 | |publication year=1973 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V26/V26_1097.xml |
|subfamily=Orchidaceae subfam. Orchidoideae | |subfamily=Orchidaceae subfam. Orchidoideae | ||
|tribe=Orchidaceae tribe Cranichideae | |tribe=Orchidaceae tribe Cranichideae | ||
Latest revision as of 21:11, 5 November 2020
Plants 7–60 cm. Roots few, descending, tuberous, mostly to 0.8 cm diam. Leaves fugaceous or rarely persisting to anthesis, basal, ascending, linear-lanceolate to oblanceolate, to 16 × 1.5 cm. Spikes usually very tightly spiraled, 3–4 flowers per cycle of spiral; rachis moderately pubescent, some trichomes capitate, glands obviously stalked (longest trichomes 0.2–0.52 mm). Flowers abruptly nodding from base, white to ivory, gaping, lip not strongly curving from claw, not urceolate; sepals distinct to base, 5–14 mm; lateral sepals wide-spreading, commonly ascending above flower; petals linear to lance-oblong, 4.9–13 mm, apex acute to obtuse; lip commonly yellow centrally, ovate to oblong, 4.9–12 × 3.3–7 mm, margins crenulate, glabrous; veins several, branches parallel; basal calli short-conic, mostly to 1 mm; viscidia linear-lanceolate; ovary 4–10 mm. Seeds monoembryonic. 2n = 30.
Phenology: Flowering Aug–Nov.
Habitat: Dry to wet prairies and fens
Elevation: 0–1900 m
Distribution
Man., Ont., Ala., Ark., Ill., Ind., Iowa, Kans., Ky., La., Mich., Minn., Miss., Mo., Nebr., N.Mex., N.Dak., Ohio, Okla., Pa., S.Dak., Tex., Va., Wis.
Discussion
Leaves typically senesce some weeks before anthesis, usually before the inflorescence appears. Occasionally at the northern and western range limits of the species, however, especially in wetter habitats, they may persist into anthesis. See notes on gene flow and apomixis under 14. Spiranthes cernua.
Selected References
None.