Cyrtanthus species K-O are found on this wiki page
Cyrtanthus leucanthus has grasslike foliage and tubular white flowers. It is another species stimulated to bloom by fires. There is little information available online about this species, but you can find a short article here and a small photograph here.
Cyrtanthus loddigesianus (syn. Cyrtanthus speciosus) This floriferous, creamy-flowered species is one of the easiest Cyrtanthus species to grow. It flowers mid-summer. It is found on grassy fynbos or in grassland in coastal sands in the southeastern Cape. Photo by Bill Dijk.
Cyrtanthus mackenii is an Eastern Cape species with evergreen and deciduous forms. The evergreen form grows in stream beds in riverine forest patches near the south east coast of South Africa, always in shade. Often if grows between rocks in the streams beds with the bulbs submerged in water or on the edges of pools. Wild populations usually only flower in July and August (late winter).
The evergreen forms are some of the most easily grown of all Cyrtanthus species. They flower when they feels like in captivity, especially when hybridised with similar species (like Cyrtanthus brachyscyphus). These forms are ideal container subjects, garden plants and cutflowers. Numerous colour forms exist and all are delightfully scented. This species is particular ornamental when different colour forms are grown together in the same container. It likes to remain undisturbed for many years for best results. The first photo below is a photo by Bill Dijk of a white flowered form. Photos 2-4 were taken by Hans Joschko of various colored forms. The last image shows 2-month-old seedlings, photo by Byron Amerson.
Cyrtanthus mackenii ssp. cooperi is an inland form that is widespread found growing in full sun in moist grassland. It has been elevated from a variety to a subspecies. It differs by being deciduous, having shorter more grey leaves, flowering in early spring (from July to September) before the leaves appear, and is a dull pinkish yellow (in contrast to the evergreen form which is clear, bright yellow). Photos by Cameron McMaster of this species in the Eastern Cape near Stutterheim.
Cyrtanthus mackenii ssp. mackenii is an evergreen yellow form that flowers on the edges of pools in sheltered streams near the coast in the Eastern Cape. Photos by Cameron McMaster.
Cyrtanthus macmasteri was described in 2003. It has large red flared flowers and was named after Cameron McMaster who saw a specimen in 1994 when with his family in the Bolo River Gorge in the Eastern Cape. He did the follow up work to locate where it grew and to obtain specimens so the necessary documentation could be done so it could be verified and named. He has kindly provided an article first published in Veld and Flora, March 2004, about this experience. This species grows in thick grass between rocks on steep slopes, often shaded by shrubs and trees. It blooms in the wild in February and March. Photos by Cameron McMaster of the flowers and the habitat.
Cyrtanthus macowanii is a summer flowering species with red tubular flowers and is widespread in the Eastern Cape. This species is very similar to Cyrtanthus epiphyticus. Photos by Cameron McMaster and Mary Sue Ittner taken in habitat in the Eastern Cape.
Cyrtanthus montanus is one of the most striking species, producing orange umbels in autumn. This plant requires very infrequent watering; there is nothing quite as irretrievable as a bulb of C. montanus once it has started to rot. Usually evergreen, but needs to be almost bone-dry in winter. Photos by Bill Dijk and Cameron McMaster of this species that is very rare in the wild.
Cyrtanthus obliquus is a widespread species native to the E. Cape from Knysna to the Kei River mouth. The climate is subtropical with rainfall in both summer and winter but more so in summer. The habitat receives 400-500 mm per year. The plants can be seen as clumps, often in rock outcrops among succulent plants. The plant in flower is impressive in every way; its twisted evergreen, glaucous foliage combines magnificently with the sturdy peduncle or stalk of pendulous, yellow, red and green flowers. Adult plants prefer full sun, with at least two-third of the large bulb above ground. It requires much less water in winter, and blooms in spring and summer. At Kirstenbosch BG, the plants do fine even with regular watering during the winter. Seedlings seem to not like full sun and do best in part sun.
The first two photos were taken by Bill Dijk and John Ingram. John wrote: "This is the first bloom for me for this species. I have had the bulbs for almost 3 years now and they were either 3 or 5 years old when I got them. I am amazed at the thick solid texture of the flowers. There is some snail damage on flowers on the backside and trails are evident in the photo but I think once the flowers get past a certain age, they are too hard for the snails to consume." The last two photos were taken by Roy Herold at the Karoo Desert NBG in Worcester, October 2002.
This species is native to the southeastern Cape where it is found on exposed rocky outcrops where its bulbs are crowded between rocks or cling to steep cliffs. Photos of a plant in habitat taken by Cameron McMaster, a close-up, and a picture of the plants with seed capsules..
Cyrtanthus obrienii is an evergreen spring species with red pendulous flowers. It is fairly attractive and quite a tough plant, preferring to stay in the same position for many years. Photos by Cameron McMaster and Alessandro Marinello.