Hippeastrum is a genus in the family Amaryllidaceae with 70-75 species and 600+ hybrids and cultivars. The genus is native to tropical regions of the Caribbean, Mexico and South America. The Hippeastrum main page has information about cultivation and lists the species and hybrids that are included in the PBS wiki.
This page contains Hippeastrum species A-O. Other species are found on the Hippeastrum species P-Z page.
Hippeastrum aglaiae is a rainforest species from northern Argentina with orange, cream or pink flowers. Photograph by Germán Roitman
Hippeastrum angustifolium is a bog species from northern Argentina with big and spectacular flowers. Photograph by Germán Roitman.
Hippeastrum argentinum (syn. Hippeastrum tucumanum) is native to Tucuman, Catamarca, and Salta, northwestern Argentina. It is one of the white trumpet species that are commonly known as "azucenas" or "lilies". It has long strap-shaped, and mostly pure white tepals. There is a form with pinkish reflexes and is described by Piero Ravenna as H. argentinum forma rosea. In habitat, plants receive rain from December-March (part of spring and summer). Dormancy takes place during part of autumn, winter, and part of spring. Photos by Doug Westfall.
Hippeastrum aulicum see the Hippeastrum aulicum page.
Hippeastrum bukasovii is another of the rare and highly sought after Peruvian bulbs. Like Hippeastrum intiflorum it grows high in the mountain canyons about 6000 ft (1400 to 1800 m) in heavy forest mulch and on rather steep slopes. This species blooms in September (spring) in Peru and early March in California. Photo taken by Doug Westfall.
Hippeastrum calyptratum see the Hippeastrum calyptratum page.
Hippeastrum correiense. I got this from a large Japanese bulb company (Komoriya), and was told it was Hippeastrum coliense. I can't find a picture of it on the web anywhere, and when it bloomed, at first I didn't think it looked like the picture in the catalog. But then I realized that the front-on view looked the same and I just didn't know it had such a long trumpet and that this is as wide as it opens. The scape is about 2/3 of a meter tall. Photo taken March 2004 by Lee Poulsen.
Hippeastrum cybister is native to Bolivia and Argentina and is often mentioned in the literature, but is found in few collections. In habitat, plants receive rain from December-March (part of spring and summer). Dormancy takes place during part of autumn, winter, and part of spring. The stem on this first bloom is 19 inches tall. Doug Westfall says, "I think that it may be my favorite Hippeastrum". Pictures 1, 2 by Doug Westfall, 3 by Jamie Vande of a cultivar that is commonly available in Germany (may be a named clone) 4, 5 of floral colour patterns by Jacob Knecht.
Hippeastrum "euryphyllum" (syn. Amaryllis euryphylla Ravenna 2003) cannot be found as a validly published name in major plant taxonomic databases. However, it is pretty clear that the plant is a Hippeastrum so we are including it here. The species falls within the subgenus Macropodastrum (white flowers with long tubes). In Argentina three other species of this subgenus are recorded: H. argentinum (syn. H. tucumanum, H. candidum, H. immaculatum), H. parodii and H. guarapuavicum. Hippeastrum euryphyllum can be distinguished from the others by the light yellow-creamy trumpet shaped flowers, the very short style arms, as well as the area where it grows among rocks in rocky slopes in the three hills that gave the name to the Tres Cerros hamlet, Department of San Martin, Province of Corrientes. The species also has the broad, comparatively short leaves. Photos 1-3 were taken in northern Argentina by Germán Roitman. Photos 4-6 were contributed by Mariano Saviello of plants from a different site in situ.
The photos below were taken by Mariano Saviello of cultivated plants.
Hippeastrum evansiae is a species that is now rare because its previous habitats are now being used for agriculture. It grows in hot dry forests and prefers a dry warm winter. While not uncommon in collections, H. evansiae is not seen too often. It is one of the smaller of the species, but it is well worth a place in any bulb collection. This species needs a winter dormancy in order to bloom. The first 2 pictures were taken by Doug Westfall in Southern California and the third by Bob Rutemoeller shows plants blooming in Harry Hay's gardens in May 2004. Photos 3-6 were taken by Nhu Nguyen.
Hippeastrum glaucescens is said to be a synonym or a very allied species of Hippeastrum teyucuarense. It is a winter deciduous, very variable species with glaucous leaves native to Brazil, where is known as 'Lirio Do Mato' (Lily of the Mato, referring the Matto Grosso). It is native to biomes of Caatinga, Cerrado and Mata Atlântica in the states of Bahia (North-East Brazil), Goiás, Distrito Federal, Mato Grosso do Sul (Center-West Brazil), Minas Gerais, Espírito Santo, São Paulo, Rio de Janeiro (South-East Brazil) and Paraná and Santa Catarina (Southern Brazil). A recent study by Daviña et al. stated that important similarities exists between this species and H. iguazuanum and H. teyucuarense. It can be grown as a pot plant under full sun. In cultivation (Argentina/Brazil) it flowers in early spring (September-October) and the tepals, unlike H. teyucuarense, tends to fold inwards quite easily, just two or three days after opening. The photos below were contributed by Mariano Saviello. Photo 1-3 detail the flowers. In photo 2, it is possible to appreciate the glaucous leaves which gives the name to this species. Photos 4-5 compares two closely related species: H. iguazuanum (Argentina, left) and H. glaucescens (Brazil, right). Both species flower at the beginning of spring (September-October in the Southern Hemisphere).
Hippeastrum iguazuanum see the Hippeastrum iguazuanum page.
Hippeastrum intiflorum Pictures of this seldom seen Hippeastrum were taken by Doug Westfall in Long Beach California. It was grown from seed by Dennis Tsang in Hong Kong and sent to me a couple of yrs. ago. Very little has been written in the literature about Hippeastrum intiflorum. These are the observations made in my Southern California garden. The Inca people believed that "Inti" (Quechua for the sun) was the ancestor of the Inca people. So, the name, "intiflorum" means the "Flower of the Sun," or "Flower of a god". Certainly, the flower is one of the most beautiful of the Hippeastrum. The species is native to Quispecanchis Province in the Department of Cusco, Peru. It grows in deep river gorges above 2,500 meters. While the bulb probably has a significant amount of shade in the wild, it seems to benefit from a sunny location in cultivation. It should be planted in well draining soil in a two to five gallon container. My soil mix consists of 4 parts sand, 2 parts forest mulch, 2 parts peat, and 1 part perilite or pumice. The growth tip of the bulb is planted at or just below the surface of the planting mix. Hippeastrum intiflorum seems to thrive and bloom with regular feedings of quarter strength liquid fertilizer. (Thanks to Dennis Tsang, Albert Castillo, and the encyclopedia for information on location and meaning of the name.)
Hippeastrum mandonii was collected by Fred Meyer in Bolivia in the 1970s. Flowers are lime green with red tips. Photos taken by Mary Sue Ittner at Telos Rare bulbs.
Hippeastrum miniatum is native to river gorges high in the Peruvian Andes. It seems to prefer part shade and is reported to produce up to six flowers on one stem on mature bulbs in ideal conditions. Photo taken by Doug Westfall.
Hippeastrum "neoleopoldii" (syn. Amaryllis neoleopoldii) is from Bolivia. The name has not been published since it was inadvertently left out when other Amaryllis species were transferred to Hippeastrum as it was not clear that it was a separate species from the very similar Hippeastrum leopoldii. Hippeastrum neoleopoldii has a more saturated red color and white flecks. We are adding it under "neoleopoldii" because it is grown under this name in cultivation. Photo from Doug Westfall.