Waterspider False Reinorchid
The waterspider false reinorchid, Habenaria repens, is a semi-aquatic terrestrial orchid.
Habenaria repens is found in the orchid, Orchidaceae, family.
It grows to a height of about two feet.
The clasping leaves are sword shaped (gladiate) and grow upwards along the stem. Leaves are very thick and grow from 2 to 9 inches long.
This terrestrial orchid has very large flower racemes with the lower flowers opening first and continuing up the stalk as they mature.
The small, delicate, flowers are green with slender, lateral, winglike petals that make the flowers resemble spiders and are 3/4” across. Flowers appear in the summer and fall in central and north Florida, but all year in the southern part of the state. The flowers are very fragrant at night.
It occurs naturally in riparian areas such as the margins of streams, ponds, lakes and wet ditches. It prefers open, treeless areas, with wet soil. It can also be found growing in standing water or in mats of floating vegetation along wet areas.
In the home landscape it grows in full sun to partial shade with moist soils and can grow in standing water. It is an attractive plant to grow in problem wet areas or in a naturalized, waterfont, setting.
It grows in garden zones 8 to 11.
The waterspider false reinorchid, Habenaria repens, is native to the West Indies, Central America, Mexico and the coastal plains of the southeastern United States.
Insects, such as flies, bees, and beetles, use the flowers as a nectar source during the day and nocturnal moths use the flowers as a nectar source at dusk and throughout the evening hours. Ducks like to forage among the flower racemes for small insects and spiders.
This orchid has a special mechanism to deter crayfish from eating its foliage by emitting a chemical called Habenariol. 
It spreads by underground runners. Propagation is achieved by transplanting specimens or growing from seed.
These native orchid seeds require mycorrhizal fungi to germinate so they are best planted in a natural site, which meets their growing requirements, or the use of natural soil and leaf litter in growing pots.
 Keel, Brian G., et al. “Seed Germination of Habenaria Repens (Orchidaceae) in Situ Beyond Its Range, and Its Potential for Assisted Migration Imposed by Climate Change.” Castanea, vol. 76, no. 1, 2011, pp. 43–54. JSTOR, www.jstor.org/stable/41301579.