The New World genus Hymenocallis Salisbury (Amaryllidaceae), recognized as a distinct genus since 1812, is composed of roughly 70 to 80 species. The native habitats range in the United States from Indiana, Kentucky, Virginia, south to the Carolinas, Georgia, Florida, Alabama, Louisiana, Texas and Mexico where the genus explodes; the majority of the species occur in Central America and radiate down into the northern portions of South America (Venezuela, Guyana, and Brazil) as well. This genus was the subject of the PBS list topic of the week in April 2004. Kevin Preuss provided the introductions in two parts. This opening paragraph was taken from the beginning of the first post. See Introduction--Part One Introduction--Part Two
The three closely related genera once classified as Hymenocallis are Ismene, Elisena, and Leptochiton. Ismene, Elisena and Pseudostenomesson are now considered subgenera of Ismene. For the description of the difference between Ismene and Hymenocallis consult the Ismene wiki page. Leptochiton (the former Hymenocallis quitoensis and Hymenocallis heliantha) is recognized as a distinct genus.
Ismene Hybrids includes hybrid plants that are part of the Hymenocallis complex including the genera Elisena, Ismene, Hymenocallis, and Leptochiton. The plants known as Hymenocallis × festalis and Hymenocallis × spofforthiae 'Sulphur Queen' will be found on this page.
Hymenocallis acutifolia is native to Mexico. It has narrow foliage and blooms from late summer through autumn. Photos taken August 2007 by Jay Yourch.
Hymenocallis caribaea 'Variegata' has attractive grayish green foliage with wide creamy white margins. Photos taken August 2007 by Jay Yourch.
Hymenocallis eucharidifolia is native to Mexico. A beautiful flower on a beautiful plant. Bloomed at the same time as H. sonorensis. Photos taken September 2004 by Lee Poulsen.
Hymenocallis harrisiana is a deciduous species from Mexico. The strap shaped leaves are glaucous, as it comes from an arid area. The flower has a small scented corona (crown). Each flower lasts only one night. Photos taken by Alberto Grossi and Jay Yourch.
Hymenocallis liriosme growing in the Lady Bird Johnson Wildflower Center. It is native to Texas as well as several other southern states. Photos of plants in bloom taken April 2004 by Lee Poulsen. An additional photo of a bulb and seeds supplied by Joe Shaw of Conroe, Texas, was taken by Jim McKenney. Two of the seeds are already germinating. The ruler measures inches.
Hymenocallis littoralis is a vigorous evergreen species from Mexico and Guatemala which grows with its roots in the water during the warm growing season, making a good garden subject in warm climates. It requires protection during cold winters. The lovely white flowers have long narrow reflexed petals behind a central cup. Several flowers are carried on each sturdy 70-90 cm. stem. Photos by Bill Dijk and Alberto Grossi.
Hymenocallis maximilianii is native to Mexico. It has compact, narrow, erect, foliage and gracefully proportioned flowers. Photos taken August 2005 by Jay Yourch.
Hymenocallis occidentalis is native to the Eastern United States and blooms in late summer. Depending on the plant and the growing environment the leaves may be absent, like a Lycoris, or present at bloom time. Photos taken August 2006 by Jay Yourch.
Hymenocallis riparia is native to Mexico. It's a small plant with narrow, spreading foliage. Photos taken July 2007 by Jay Yourch.
Hymenocallis 'Sister of Tropical Giant' has flowers like 'Tropical Giant', but all six segments recurve equally. The foliage is broad and grayish green instead of the dark green, glossy foliage of 'Tropical Giant'. Photos taken by Jay Yourch.
Hymenocallis sonorensis is found along streams and valleys throughout Sonora, Mexico. The first photo taken September 2003, but the plant grew even larger and had several scapes in September 2004. Photos by Lee Poulsen.
Hymenocallis spp. Below are three unidentified species. Help identifying them would be appreciated.
Hymenocallis sp. , photo by Kevin Preuss of a plant collected in Guatemala by Dr. Robert Dressler.
Hymenocallis sp., possibly Hymenocallis littoralis from Out Islands of Bahamas: 26 36' 13.76" N, 77 00' 37.17" W elev. 15'. Grown on active dune with up to 6" increase in dune height annually. Note extensions at bottom of bulb. Out of almost 100 plants rescued from the ocean after hurricane Jeanne, most had these extensions or evidence that they had snapped off. It looks like the extension acts to keep the bulb near the surface as sand builds up on the dune. Interesting that the oldest section resembles a rhizome. Photos by Phil Andrews.
Hymenocallis sp. received as Hymenocallis philipinas by Alessandro Marinello. The bulb measured 9 cm in diameter with leaves 7 cm wide. It bloomed in October. It was suggested to be Hymenocallis littoralis.
Hymenocallis traubii is a spring-blooming species native to Florida. It is a small plant with large flowers. Photo taken May 2006 by Jay Yourch.
Hymenocallis 'Tropical Giant' has broad, glossy, stiff, dark green foliage and nicely proportioned flowers. Note how three of the six segments display more pronounced recurvature. Photos taken by Jay Yourch.
Hymenocallis tubiflora is from South America, photo by Kevin Preuss.
