Cyclamen hederifolium

Cyclamen hederifolium, the ivy-leaved cyclamen or sowbread, is a species of flowering plant in the family Primulaceae. It is the most widespread cyclamen species, the most widely cultivated after the florist's cyclamen (Cyclamen persicum), and the most hardy and vigorous in oceanic climates. It is native to woodland, shrubland, and rocky areas in the Mediterranean region from southern France to western Turkey and on Mediterranean islands, and naturalized farther north in Europe and in the Pacific Northwest.

Cyclamen hederifolium
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Ericales
Family:
Primulaceae
Genus:
Cyclamen
Subgenus:
Cyclamen
Series:
Cyclamen
Binomial name
Cyclamen hederifolium
Synonyms

Cyclamen neapolitanum Ten.

Names

The species name hederifolium comes from the Latin hedera (ivy) and folium (leaf),[1] because of the shape and patterning of the leaves. The older species name, neapolitanum, refers to Naples, where the species grows.

Description
Growth habit

Cyclamen hederifolium is a tuberous perennial that blooms and sprouts leaves in autumn, grows through the winter, and goes dormant before summer, when the seed pods ripen and open.

Tuber
Dried tubers at market in Remscheid, Germany

The tuber is round-flattened and produces roots from the top and sides, leaving the base bare. In the florist's cyclamen (Cyclamen persicum), roots come from the bottom, leaving the top and sides bare.

The tuber becomes larger with age; older specimens commonly become more than 25 cm (10 in) across. In other species, tubers do not grow as large; Cyclamen coum usually does not reach more than 6.5 cm (2.6 in) across.

Leaves and flowers grow from buds on top.

Leaves

The leaves are variably shaped and colored. Depending on the specimen, leaf shape varies from heart-shaped to long and arrow-shaped, usually with 2-3 angled lobes on each side, resembling the juvenile leaves of ivy (Hedera). Leaf color varies from all-green to all-silver, but the most common is a Christmas tree or hastate pattern in silver or pewter and various shades of green.

The petiole and flower stalks of Cyclamen hederifolium grow outwards and then up, forming an "elbow". Plants in narrow pots often have a ring of leaves around the outside of the pot. In the closely related Cyclamen africanum, stalks grow up from the tuber without a bend near the base.

  • typical leaves
  • an all-silver leaf form
  • leaves collected on Zakynthos, showing range of leaf shapes
  • Leaf Cyclamen hederifolium.
  • New leaf among fallen autumn leaf.

Flowers

The flowers bloom from late summer to autumn and have 5 petals, usually pink, purple, or white with a streaky magenta V-shaped marking on the nose, but sometimes pure white with no markings.

The edges of the petals near the nose of the flower are curved outwards into strong auricles. These are not present in some other species, such as Cyclamen persicum. The flowers are occasionally fragrant. The shape of the flower varies from long and thin to short and squat.[2]

  • flowers with particularly prominent auricles
  • short flowers with wide noses
  • underside of auricles

Fruit

After fertilization, the flower stem coils tightly, starting at the end, and rests above the tuber. Seeds are amber, held in a round pod, which opens by 5-10 flaps at maturity.

Cultivation
Cyclamen hederifolium naturalized in Belgium

Cyclamen hederifolium is usually listed as the hardiest species of cyclamen. In oceanic climates, it self-seeds abundantly and will crowd out less vigorous species such as Cyclamen coum if the two are planted together. In cold continental climates such as Calgary, Alberta, where Cyclamen purpurascens grows well, it may not survive.[3] DavesGarden.com lists it as hardy to zone 5a (−20 °F or −29 °C), although hardiness is dependent on presence of snow cover.

This plant has gained the Royal Horticultural Society's Award of Garden Merit[4] (confirmed 2017).[5]

Subdivisions

Varieties and forms
pink throat of white form

There are two varieties or subspecies (hederifolium and confusum), and var. hederifolium has two named forms, differentiated by leaf and flower characteristics.

  • Cyclamen hederifolium var. hederifolium — leaves with well defined markings
    • C. hederifolium var. hederifolium forma hederifolium — pink or purple flowers with darker markings at the base of the petals
    • C. hederifolium var. hederifolium forma albiflorum — white flowers, sometimes with pale pink throat — this form has also won the RHS AGM [6]
  • Cyclamen hederifolium var. confusum — fleshier leaves with poorly defined markings

The variety Cyclamen hederifolium var. poli, with long sagittate (arrowhead-shaped) leaves, is listed by the Pacific Bulb Society.

  • Cyclamen hederifolium var. hederifolium forma hederifolium (purple flowers)
  • Cyclamen hederifolium var. hederifolium forma albiflorum (all-white flowers)

Cyclamen hederifolium var. confusum (C. confusum)
Cyclamen hederifolium var 'confusum', now known as C. confusum, Osaka Prefectural Flowers Garden, Osaka, Japan

In chromosome count, var. confusum is tetraploid, while var. hederifolium is diploid.

Recently var. confusum has been elevated to the level of species as Cyclamen confusum,[7] although this is not reflected on GRIN.[8]

Cultivars

There are a number of cultivated varieties of Cyclamen hederifolium.

Cyclamen hederifolium 'Amaze me', a cultivar with dark-pink flowers, is early blooming

Cyclamen hederifolium 'Ruby Glow' has particularly deep all-magenta flowers.[9]

Cyclamen hederifolium 'Stargazer' has upward-facing flowers.[10]

References

Notes
  1. hedera, folium. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
  2. post 434. Cyclamen 2009. Scottish Rock Garden Club Forum.
  3. post 20. Cyclamen kuznetzovii. Scottish Rock Garden Club Forum.
  4. "Cyclamen hederifolium". Royal Horticultural Society. Retrieved 2020-04-17.
  5. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 22. Retrieved 24 January 2018.
  6. "Cyclamen hederifolium var. hederifolium f. albiflorum". RHS. Retrieved 5 May 2020.
  7. Spring Flower Finding Trip 2010 (itinerary). Flowers of Crete.
  8. "Cyclamen hederifolium". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2010-11-24.
  9. photos from AGS Loughborough Autumn show. Alpines for the Enthusiast (blog).
  10. Cyclamen hederifolium 'Stargazer'. GAP photos.

Sources
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