Agreed, my answer wasn't really apropos the fist question. But, at least S. odorata
has been cultivated in aquaria, with some success, as it's a marshland plant living in the inundation zone. In this, it is like many other plants grown in our aquaria, e.g. some swords come to mind. Here a quote from Flora of North America
Flowering Sep--Dec. Cypress and hardwood swamps, marshes, prairies, riverbanks, ditches; 0--300 m; Ala., Ark., Fla., Ga., Ky., La., Md., Miss., N.C., Okla., S.C., Tenn., Tex., Va.
Spiranthes odorata typically occurs in seasonally inundated sites and may bloom while emerging from shallow water.
Regarding Habenaria repens
, the same source
writes (emphases again mine):
Plants terrestrial or semiaquatic[--].
Flowering primarily summer--fall, sporadically (Apr--Dec). 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; 0--100 m; Ala., Ark., Fla., Ga., La., Miss., N.C., Okla., S.C., Tex.; Mexico; West Indies; Central America; South America.
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. [--]