Difference between revisions of "Ponthieva racemosa"
Contr. U.S. Natl. Herb. 6: 460. 1901.
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|common_names=Shadow witch | |common_names=Shadow witch | ||
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|name=Arethusa racemosa | |name=Arethusa racemosa | ||
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|publication title=Contr. U.S. Natl. Herb. | |publication title=Contr. U.S. Natl. Herb. | ||
|publication year=1901 | |publication year=1901 | ||
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| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V26/V26_1117.xml |
|subfamily=Orchidaceae subfam. Orchidoideae | |subfamily=Orchidaceae subfam. Orchidoideae | ||
|tribe=Orchidaceae tribe Cranichideae | |tribe=Orchidaceae tribe Cranichideae | ||
Revision as of 22:12, 27 May 2020
Plants 30–60 cm. Roots 2–3 mm diam. Stems subterranean, short. Leaves green at anthesis, 2–6, subpetiolate; blade elliptic to oblanceolate, 5–17 × 2–5 cm, apex rounded to acute. Inflorescences: peduncle to 25 cm, partially enclosed by tubular sheaths, proximalmost sometimes leafy; rachis laxly 20–35-flowered, 5–25 cm; floral bracts narrowly lanceolate, clasping base of ovary, to 10 mm, apex acuminate, pubescent. Flowers: sepals greenish white, adaxially pubescent; dorsal sepal distinct, ovate-elliptic to elliptic-lanceolate, 4–7 × 2–3 mm, apex obtuse; lateral sepals broadly, obliquely ovate, 4.3–6.5 × 2.5–3.5 mm, apex acute to obtuse; petals white, green-veined, obliquely triangular, 4–6 × 3.5–5 mm, margins minutely ciliate or entire, glabrous; lip white with green, deeply concave center, distinctly clawed, suborbiculate, 5–7 × 5–7 mm, apex short-caudate; column white, 4–5 mm; pedicellate ovary 10–20 mm. Capsules 8–13 mm.
Phenology: Flowering fall–winter (Sep–Feb).
Habitat: Moist, shady hammocks, swamps, ravines, wet savannas, pine forests
Elevation: 0–50 m
Distribution
Ala., Fla., Ga., La., Miss., N.C., S.C., Tex., Va., Mexico, West Indies, Central America, South America.
Discussion
In Florida, Ponthieva racemosa is self-compatible but not autogamous. Natural fruit-set in one population in northern Florida was 35% (J. D. Ackerman 1995). In Florida, small halictid bees were observed visiting the flowers (C. A. Luer 1972).
Selected References
None.