Difference between revisions of "Ponthieva racemosa"

(Walter) C. Mohr

Contr. U.S. Natl. Herb. 6: 460. 1901.

Common names: Shadow witch
Basionym: Arethusa racemosa Walter Fl. Carol., 222. 1788
Synonyms: Neottia glandulosa Sims Ponthieva glandulosa (Sims) R. Brown
Treatment appears in FNA Volume 26. Treatment on page 548. Mentioned on page 547.
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|hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Cranichideae;Orchidaceae (tribe Cranichideae) subtribe Cranichidinae;Ponthieva;Ponthieva racemosa
 
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Revision as of 20:44, 16 December 2019

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

V26 1117-distribution-map.jpg

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.

Lower Taxa

None.
... more about "Ponthieva racemosa"
James D. Ackerman +
(Walter) C. Mohr +
Arethusa racemosa +
Shadow witch +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +, Va. +, Mexico +, West Indies +, Central America +  and South America. +
0–50 m +
Moist, shady hammocks, swamps, ravines, wet savannas, pine forests +
Flowering fall–winter (Sep–Feb). +
Contr. U.S. Natl. Herb. +
Illustrated +
Neottia glandulosa +  and Ponthieva glandulosa +
Ponthieva racemosa +
Ponthieva +
species +