Habenaria repens

Nuttall

Gen. N. Amer. Pl. 2: 190. 1818.

Common names: Water-spider orchid Floating orchid water orchid
Illustrated
Synonyms: Habenaria nuttallii Small
Treatment appears in FNA Volume 26. Treatment on page 582. Mentioned on page 581, 583, 584.

Plants terrestrial or semiaquatic, erect to decumbent, 10–90 cm. Leaves scattered along stem and gradually reduced to sheathing bracts; blade ascending, linearlanceolate to lanceolate, narrowly elliptic, or oblanceolate, 3–25 × 1–4.5 cm. Inflorescences: floral bracts spreading to ascending, lanceolate, 15–90 × 5–12 mm. Flowers ascending, not showy; sepals 3–7 × 3–4 mm; dorsal sepal shallowly concave; lateral sepals reflexed-spreading; petals greenish, lamina ascending, falcate, 3–7 × 1 mm, lateral lobe arcuately spreading-ascending, filiform, slightly to markedly exceeding petal; lip greenish, middle lobe descending, linear, 4–7 × 1 mm, lateral lobes ascending-spreading, filiform, 5–11 mm; spur slenderly cylindric to scarcely club-shaped, 0.8–1.4 cm; ovaries 9–15 mm. Capsules on short pedicel, nearly erect, 8–15 × 3–7 mm,


Phenology: Flowering primarily summer–fall, sporadically (Apr–Dec).
Habitat: Marshes, wet meadows, bogs, margins of streams, ditches, and ponds, commonly an emergent aquatic in shallow water and in floating mats alone or with other vegetation
Elevation: 0–100 m

Distribution

V26 1190-distribution-map.jpg

Ala., Ark., Fla., Ga., La., Miss., N.C., Okla., S.C., Tex., Mexico, West Indies, Central America, South America

Discussion

Habenaria repens is remarkable in sometimes being truly aquatic. Often forming floating mats, the plants then are commonly decumbent, at least basally, and new shoots and slender roots arise abundantly from much of the length of the stem. A few spheroid tuberoids are sometimes produced from roots arising at wide intervals. Other roots bear new shoots some decimeters from the parent stem; the distal portion of the root then commonly enlarges into a slenderly lance-fusiform tuberoid.

Selected References

None.

Lower Taxa

None.
... more about "Habenaria repens"
self-pollination +
Charles J. Sheviak +
Nuttall +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
3 cm30 mm <br />0.03 m <br /> (25 cm250 mm <br />0.25 m <br />) +
oblanceolate +, elliptic +  and lanceolate +
1cm;4.5cm +
reduced +  and large +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Water-spider orchid +, Floating orchid +  and water orchid +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, Okla. +, S.C. +, Tex. +, Mexico +, West Indies +, Central America +  and South America +
0–100 m +
1.5 cm15 mm <br />0.015 m <br /> (9 cm90 mm <br />0.09 m <br />) +
spreading +  and ascending +
Marshes, wet meadows, bogs, margins of streams, ditches, and ponds, commonly an emergent aquatic in shallow water and in floating mats alone or with other vegetation +
lateral +  and terminal +
ascending-spreading +  and spreading-ascending +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
reflexed-spreading +
petiolate +, sessile +  and simple +
reduced +
3-lobed +
larger +
differing in form and color +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1-many-flowered +  and cymose +
pendent +  and erect +
Flowering primarily summer–fall, sporadically (Apr–Dec). +
Gen. N. Amer. Pl. +
aerial +  and subterranean +
slender +
minute +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Illustrated +
slenderly cylindric +  and scarcely club-shaped +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Habenaria nuttallii +
Habenaria repens +
Habenaria +
species +
semiaquatic +  and terrestrial +
saprophytic +, photosynthetic +  and mycotrophic +
erect +  and decumbent +