Hippeastrum

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. Hippeastrum means "knight's star" from hippeus, meaning a horseman or knight. Herbert, who named the genus called it "knight's star lily". It is very popular in the bulb world where gardeners erroneously call it Amaryllis. This is especially true of the hybrids which are usually sold under that name. This was the name given to this species many decades ago, however, the horticultural trade has not made efforts to call these plants by their correct names (and perhaps this would not even be possible). ×Hippeastrelia is the page that shows hybrids between one this genus and Sprekelia.

Cultivation of these plants have been well documented and cultivation through seeds have been discussed thoroughly on the PBS forum. Seeds have short viability but no loss of viability had been observed after 4 months. Because of this short viability period seeds should be sown as soon as possible. There are two basic method to sowing seeds. One method is direct sowing, either into potting mix or potting mix with a thick layer of sand on top. The second method is floating. Seeds/seedlings can be planted in either a good mix of about 3 parts sterile potting soil (commercial), 2 parts coarse sand, 2 parts vermiculite, and 2 parts perlite (Stephen Putman). Jiffy-7 peat pellets can also be used (Kelly Irvin). Seeds can be sown individually in small 3-4" (7-10 cm) or planted in a community style with 6 seeds per pot. Community style pots are useful when there is little space but there is always more root disturbance when transplanting.

To sow the seeds directly, lay the seeds flat and cover the them with about 1/8-1/4" (0.5-1 cm) of the potting mix. Place the pots into a tray of water and allow the medium to soak thoroughly. Place the pots on a west facing windowsill and bottom water once a week. Germination takes 2-4 weeks with about 80-100% germination rate. Survival of seedlings at 6 months was about 90% (Stephen Putman). The wet sand method is employed by some gardeners with good success. Fill a pot to about 1" (3 cm) to the top with a well drained mix. Fill the pot almost to the top with sand, wetting the sand as necessary. Make a slit in the sand and insert seeds into the slit sideways, firming the sand around the seeds. Insert the pot in a plastic bag and pit it under lights. Remove the plastic bag when the leaves are about 4-6" (10-14 cm) tall. Transplant the seedlings when the leaves are about 10-12" (25-30 cm) long (John Harris).

The floating method is also popular among growers of Hippeastrum and other flat seeded amaryllids. This is done by placing good seeds into a container of clean water and carefully observe for signs of germination or seeds which appear to have fungus growth on them. Those are seeds which have lost their viability; good seeds should not get infected with water-molds. Some seeds may sink to the bottom during this period. This should not affect their germination. Once the radicle had pushed out of the seeds, carefully lift them with a pair of forceps and plant in a well drained mix (Nhu Nguyen).

There are two groups of hippeastrums functionally classified as evergreen and deciduous. Deciduous species must be allowed to go into a dry winter dormancy. Growers have noted that these species may refuse to flower or the bulbs may even rot as in H. petiolatum. At the end of autumn, deciduous species should be allowed to dry out and go into dormancy. Water evergreen species sparingly during the colder part of the year. Resume watering all species regularly at the beginning of spring. Hippeastrums tend to like being fertilized, especially during active growth (Sahuc 1997 - Herbertia pg. 72-80).

Hippeastrum is vulnerable to fungal infections such as "red blotch" caused by Stagonospora curtisii. They are also the victims of mosaic viruses, which are very easily transmitted and spread. They can also succumb to spider mites and bulb scales. Some species and hybrids can persist with a light freeze where they die down and come back when temperatures are warm enough.


For more photos and information about the species select the appropriate wiki page:

or click on the name in the table below:

Hippeastrum
Hippeastrum aglaiae, Germán Roitman [Shift+click to enlarge, Click to go to wiki entry]
aglaiae
Hippeastrum angustifolium, Germán Roitman [Shift+click to enlarge, Click to go to wiki entry]
angustifolium
Hippeastrum argentinum, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
argentinum
Hippeastrum aulicum vs. Biritibi, Angelo Porcelli [Shift+click to enlarge, Click to go to wiki entry]
aulicum
Hippeastrum blossfeldiae, Nhu Nguyen [Shift+click to enlarge, Click to go to wiki entry]
blossfeldiae
Hippeastrum bukasovii, Jacob Uluwehi Knecht [Shift+click to enlarge, Click to go to wiki entry]
bukasovii
Hippeastrum calyptratum, Digby Boswell [Shift+click to enlarge, Click to go to wiki entry]
calyptratum
Hippeastrum correiense, Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
correiense
Hippeastrum cybister, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
cybister
Hippeastrum evansiae, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
evansiae
Hippeastrum euryphylla, Mariano Saviello [Shift+click to enlarge, Click to go to wiki entry]
euryphyllum
Hippeastrum glaucescens, Mariano Saviello [Shift+click to enlarge, Click to go to wiki entry]
glaucescens
Image not available [Shift+click to enlarge, Click to go to wiki entry]
guarapuavicum
Hippeastrum iguazuanum, Mariano Saviello [Shift+click to enlarge, Click to go to wiki entry]
iguazuanum
Hippeastrum intiflorum, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
intiflorum
Hippeastrum mandonii, Mary Sue Ittner [Shift+click to enlarge, Click to go to wiki entry]
mandonii
Hippeastrum miniatum, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
miniatum
Hippeastrum neoleopoldii, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
"neoleopoldii"
Hippeastrum papilio, Liz Waterman [Shift+click to enlarge, Click to go to wiki entry]
papilio
Hippeastrum parodii, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
parodii
Hippeastrum petiolatum, Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
petiolatum
Hippeastrum psittacinum 'Atibaia', Allan Ladd [Shift+click to enlarge, Click to go to wiki entry]
psittacinum
Hippeastrum puniceum, Cynthia Mueller [Shift+click to enlarge, Click to go to wiki entry]
puniceum
Hippeastrum reginae, Tarcísio Eduardo Raduenz [Shift+click to enlarge, Click to go to wiki entry]
reginae
Hippeastrum reticulatum var. striatifolium, Jay Yourch [Shift+click to enlarge, Click to go to wiki entry]
reticulatum
Hippeastrum santacatarina, Germán Roitman [Shift+click to enlarge, Click to go to wiki entry]
santacatarina
Hippeastrum solandriflorum, Den Wilson [Shift+click to enlarge, Click to go to wiki entry]
solandriflorum
Hippeastrum sp. ex Cardoso Moreira, Nhu Nguyen [Shift+click to enlarge, Click to go to wiki entry]
sp. Cardoso Moreira
Hippeastrum striatum, Nhu Nguyen [Shift+click to enlarge, Click to go to wiki entry]
striatum
Hippeastrum teyucuarense, S. Rébora & Mariano Saviello [Shift+click to enlarge, Click to go to wiki entry]
teyucuarense
Hippeastrum vittatum, Kelly Irvin [Shift+click to enlarge, Click to go to wiki entry]
vittatum
Hippeastrum yungacense 'Kiara', Ton Wijnen [Shift+click to enlarge, Click to go to wiki entry]
yungacense

For more photos and information about the hybrids select the appropriate wiki page:

or click on the name in the table below:

Hippeastrum hybrids
Hippeastrum aulicum × johnsonii, Angelo Porcelli [Shift+click to enlarge, Click to go to wiki entry]
aulicum × johnsonii
Hippeastrum teyucuarense × angustifolium, Dell Sherk [Shift+click to enlarge, Click to go to wiki entry]
× teyucuarense
Hippeastrum × johnsonii, Jay Yourch [Shift+click to enlarge, Click to go to wiki entry]
× johnsonii
Hippeastrum × acramannii, Angelo Porcelli [Shift+click to enlarge, Click to go to wiki entry]
× acramannii
Hippeastrum 'Aphrodite', Pamela Slate [Shift+click to enlarge, Click to go to wiki entry]
'Aphrodite'
Hippeastrum 'Apricot Sensation', James Frelichowski [Shift+click to enlarge, Click to go to wiki entry]
'Apricot Sensation'
Hippeastrum 'Baby Star', Jay Yourch [Shift+click to enlarge, Click to go to wiki entry]
'Baby Star'
Hippeastrum 'Bianca', Linda Foulis [Shift+click to enlarge, Click to go to wiki entry]
'Bianca'
Hippeastrum × 'Calimero', Mark Wilcox [Shift+click to enlarge, Click to go to wiki entry]
'Calimero'
Hippeastrum 'Candy Floss', Jay Yourch [Shift+click to enlarge, Click to go to wiki entry]
'Candy Floss'
Hippeastrum 'Charisma', Jennifer Hildebrand [Shift+click to enlarge, Click to go to wiki entry]
'Charisma'
Hippeastrum 'Christmas Gift', Germán Roitman [Shift+click to enlarge, Click to go to wiki entry]
'Christmas Gift'
Hippeastrum 'Double Pecotee', Doug Westfall [Shift+click to enlarge, Click to go to wiki entry]
'Double Pecotee'
Hippeastrum 'Emerald', Kelly Irvin [Shift+click to enlarge, Click to go to wiki entry]
'Emerald'
Hippeastrum 'Exotic Star', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Exotic Star'
Hippeastrum 'Fairy Tale', Jay Yourch [Shift+click to enlarge, Click to go to wiki entry]
'Fairy Tale'
Hippeastrum 'Giraffe', Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
'Giraffe'
Hippeastrum 'Hermitage', Germán Roitman [Shift+click to enlarge, Click to go to wiki entry]
'Hermitage'
Hippeastrum 'Jaguar', Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
'Jaguar'
Hippeastrum 'Jewel', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Jewel'
Hippeastrum 'La Paz', Cynthia Mueller [Shift+click to enlarge, Click to go to wiki entry]
'La Paz'
Hippeastrum 'Lemon Star', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Lemon Star'
Hippeastrum 'Lilly Star', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Lilly Star'
Hippeastrum 'Lima', Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
'Lima'
Hippeastrum 'Lollipop', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Lollipop'
Hippeastrum 'Madame Butterfly', Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
'Madame Butterfly'
Hippeastrum 'Melfi', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Melfi'
Hippeastrum 'Minerva', Pamela Slate [Shift+click to enlarge, Click to go to wiki entry]
'Minerva'
Hippeastrum 'Neon', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Neon'
Hippeastrum 'Opal Star', Joshua Young [Shift+click to enlarge, Click to go to wiki entry]
'Opal Star'
Hippeastrum 'Red Peacock', Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
'Red Peacock'
Hippeastrum 'Sandra', Cynthia Mueller [Shift+click to enlarge, Click to go to wiki entry]
'Sandra'
Hippeastrum 'Shoka no Midorisagi', Mari Kitama [Shift+click to enlarge, Click to go to wiki entry]
'Shoka no Midorisagi'
Hippeastrum 'Snow White', Arnold Trachtenberg [Shift+click to enlarge, Click to go to wiki entry]
'Snow White'
Hippeastrum 'Toscana', Jamie Vande [Shift+click to enlarge, Click to go to wiki entry]
'Toscana'
Hippeastrum 'Yume Mitai', Lee Poulsen [Shift+click to enlarge, Click to go to wiki entry]
'Yume Mitai'

06.04.2014 - 23:58  

lakshmi (Delhi)

Hi,,may i know the clear cut difference of hippeastrum and Amaryllis from its morphology of the plant???

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Hippeastrum species A-O - Hippeastrum species P-Z - Hippeastrum hybrids A-B - Hippeastrum hybrids C-H - Hippeastrum hybrids I-N - Hippeastrum hybrids O-Unnamed - ×Hippeastrelia


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Page last modified on March 27, 2014, at 06:29 PM