Winter rain Gladiolus like their winters wet and mild and may need a dry summer dormancy. They are often less hardy, reaching down to USDA zone 8 at most.
Page 1: G. abbreviatus... Page 2: G. brevifolius... Page 3: G. carneus... Page 5: G. grandiflorus... Page 6: G. inflexus... Page 7: G. marlothii... Page 8: G. mutabilis... Page 9: G. pulcherrimus... Page 10: G. saccatus... Page 11: G. teretifolius...
Gladiolus deserticola Goldblatt is restricted to the Richtersveld, a mountainous area of northern Namaqualand. Plants grow in sheltered sites, most frequently in clay soils on south-facing slopes protected by rock or shrubs. Flowers are dark blue with a darker line in the midline of the tepals. The lower tepals or the lateral lower tepals are cream edged with purple. Flowers are weakly rose scented. Height: 10-20 cm. Photo from Rachel Saunders who found a single specimen blooming in July 2011, a bit early for this species that usually blooms mid August to mid September.
Gladiolus dolichosiphon Goldblatt & J.C-Manning was first described in 2009, after a first collection from 1986 wasn't correctly identified as new species. It grows on seasonally wet places on cool south-facing slopes in altitudes above 1300 m in the western little Karoo. The flower spike holding 4 to 7 seven pink to creamy salmon unscented flowers with the lower three tepals each with a pale lozenge-shaped median mark outlined in dark red may have up to two lateral branches. It is a member of the long tubed pink flowered Gladiolus carneus complex but is distinguished from that group by its 5 or 6 linear leaves, creamy pink to salmon flowers with a tube 30-50 mm long and longer than the dorsal tepal, and its late summer flowering (late January to mid February). Height range: up to 40 cm. The first photo from Rachel Saunders was taken the second year after a fire, January 2017. The second photo from the book Plants of the Klein Karoo courtesy of Jan and Anne Lise Schutte-Vlok.
Gladiolus engysiphon G.J.Lewis is found in clay and granitic loam in renosterveld and grassland in the Langeberg Center (Swellendam to Mossel Bay). Growing from 35 to 50 cm high, it flowers March to April. The cream flowers with red median streaks are arranged in a 2 to 6 flowered spike. Photos taken by Rogan Roth in the southern Cape in April 2021. He first thought it was Gladiolus bilineatus which has a similar flower, distribution, and flowering time in the autumn. Both are pollinated by a species of long-proboscid fly. According to John Manning the lowest leaf in Gladiolus bilineatus always develops a short, sword-shaped blade, whereas the leaf blades in Gladiolus engysiphon are either absent entirely or needle-like. The arrangement of the leaves and the diameter of the stem is also different in the two species.
Gladiolus equitans Thunberg is very similar to Gladiolus alatus but has short, broad leathery leaves with raised margins and grows on rocky hills in Namaqualand. The first one was photographed in Namaqualand in August 2001 just after it rained by Mary Sue Ittner. The second photo was taken in about the same place in September 2006 by Bob Rutemoeller, but the plants were already in seed this time. The third picture was taken by Rod Saunders. The fourth and fifth photos were taken in habitat in the Kamiesberg by Andrew Harvie.
Photos below were taken by Alan Horstmann.
Gladiolus exilis G.J.Lewis is a fall-blooming, winter-growing species from the mountains of the Western Cape where it grows in clay loam in fynbos. Growing from 25-45 cm tall, it has white to pale blue fragrant flowers with dark streaks on the lower tepals. It looks similar to Gladiolus gracilis. Photos from iNaturalist taken by Peter Thompson in the Western Cape in May and shared under a CC BY-NC license.
Gladiolus floribundus Jacq. grows on dry clay, sandy or limestone flats and slopes over a broad area of the winter rainfall Cape. It has white to cream or pinkish flowers with a dark median streak on all of the tepals and blooms in late spring. Height range: 20-45 cm. The first two photos taken by Cameron McMaster near Napier in the Overberg. Photos three, four, and five were taken by Andrew Harvie. Photo three was also taken in the Overberg in the De Hoop Nature Reserve. The last two were taken on a a rocky ridge top in the Swartberg Mountains.
Photos below from the book Plants of the Klein Karoo courtesy of Jan and Anne Lise Schutte-Vlok who write that this species grows up to 60 cm tall with broad grey green leaves. It can be confused with Gladiolus grandiflorus which has a shorter tube.
Gladiolus fourcadei (L.Bolus) Goldblatt & M.P.de Vos, syn. Homoglossum fourcadei (L.Bolus) N.E.Br, syn. Antholyza fourcadei L.Bolus, grows in a variety of soils in the Uniondale district of the Southern Cape. It has small, greenish yellow flowers with reddish veins and spots. Height range: 40-60 cm. This species is endangered, and reportedly now grows in only a single location threatened by overgrazing. The first photo was taken by Rod Saunders and the next three by Mary Sue Ittner.
Gladiolus gracilis Jacq. is very similar to Gladiolus caeruleus, but is a bit smaller, has fewer flowers (2 to 5 in a spike), is usually blue to grey, but occasionally pink or yellowish and has dark streaks (instead of spots) on the lower tepals. The lowermost tepal is usually longer in this species instead of mostly the same length as the others in G. caeruleus. It is found mostly on clay slopes (or granite) and blooms in winter. Height range: 30-60 cm. The first two photos were taken by Alan Horstmann. The third was taken by Mary Sue Ittner March 2004 of flowers grown from Silverhill Seed and the fourth in 2007 of more seed grown plants, but this time one with pink flowers. The last photo was taken by Bob Werra
The photos below were taken by Nhu Nguyen of a plant from Telos Rare Bulbs.
All of the pictures below were taken by Cameron McMaster near Napier in the Overberg and illustrate the different forms possible.
The photos taken by M. Gastil-Buhl show seeds from Silverhill Seed dry on a 1 mm grid, then wet.
Page 1: G. abbreviatus... Page 2: G. brevifolius... Page 3: G. carneus... Page 5: G. grandiflorus... Page 6: G. inflexus... Page 7: G. marlothii... Page 8: G. mutabilis... Page 9: G. pulcherrimus... Page 10: G. saccatus... Page 11: G. teretifolius...