Trichodiadema pygmaeum
Trichodiadema pygmaeum L.Bolus
Family: Aizoaceae
Common names: pygmy diadem vygie (Eng.); kareemoer vygie, perdevygie, donkievygie, doringkroon vygie (Afr.)
Introduction
Trichodiadema pygmaeum is a lovely dwarf succulent shrub with pretty pink flowers and hairy leaves. It is suitable for growing in a rockery and since it is a tiny clump-forming succulent it is perfect to grow in a pot as well.

Description
Description
Trichodiadema pygmaeum is a semi-prostrate, mat-forming, compact dwarf succulent shrub up to 30 mm high. The leaves are oblong and semicircular and covered with distinct hair-like bristles. The flowers are pink, solitary, with short pedicels, up to ± 20 mm in diameter, without bracts. Flowers have no filamentous staminodes. Seeds of the genus are pear-shaped, minutely warty and grooved, brown or yellowish. It flowers from winter to early summer. A distinguishing characteristic of the genus is the crown (diadem) of hairs on the leaf tips. However, T. pygmaeum has no proper diadems.

Conservation Status
Status
It is recorded as Vunerable (VU) on the Red List of South African Plants.
Distribution and habitat
Distribution description
This species occurs in South Africa, in the Western Cape near Swellendam in Renosterveld vegetation.
Derivation of name and historical aspects
History
The genus name is derived from the Greek words trix meaning hair and diadema meaning crown. It refers to the tuft of hair-like bristles borne on the leaf tips.
The species epithet pygmaeum refers to the dwarf size of the plant.
There are 32 species in the genus. They are widespread in the more arid areas of South Africa and in southern Namibia. In South Africa it occurs in western Free State, Western, Northern and Eastern Cape, in both winter and summer rainfall regions.
Ecology
Ecology
The plants have fibrous roots which enable them to survive drought. Possible pollinators are bees.
Uses
Use
The genus is occasionally cultivated. It is browsed by stock.

Growing Trichodiadema pygmaeum
Grow
Plants can be grown from seed. Sow seeds in plastic seed trays in autumn. Make sure the trays are adequately drained. Use a mixture of 2 parts sand, 1 part loam and 1 part compost. Sow the seeds on top of the surface and cover them with a 1mm layer of coarse river sand. If sown too deep the seeds will be smothered and will probably not germinate. Water with a fine mist spray every second day. Place seed trays in a sunny position. Plant the seedlings out when plants are strong enough to handle.
It can also be propagated from cuttings. Use new, soft material from a healthy bush. Take tip cuttings in autumn. Place cuttings in sand in multi plug trays. A rooting hormone can be added to promote root growth. Ensure that the cutting medium is kept moist. Cuttings can be hardened off for 2-3 weeks and can then be transplanted. Plants can be cultivated in pots or planted in groups in the garden in a well drained, sunny area. They can also be used in rockeries. Other succulents such as Gibbaeum, Lithops, Stomatium and other small succulents can be planted alongside to make an attractive display.
References
- Brown, N.A.C. & Duncan, G.D. 2006. Grow fynbos plants. Kirstenbosch Gardening Series. South African National Biodiversity Institute, Cape Town.
- Germishuizen, G. & Meyer, N.L. (eds) 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14. National Botanical Institute, Pretoria.
- Goldblatt, P. & Manning, J. 2000. Cape Plants. A conspectus of the Cape flora of South Africa. Strelitzia 9. National Botanical Institute, Pretoria & Missouri Botanical Garden, Missouri.
- Leistner, O.A. (ed.). 2000. Seed plants of southern Africa: families and genera. Strelitzia 10. National Botanical Institute, Pretoria.
- Raimondo, D., Von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. & Manyama, P.A. (eds) 2009. Red list of South African plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
- Smith, G., Chesselet, P., Van Jaarsveld, E.J., Hartmann, H., Hammer, S., Van Wyk, B., Burgoyne, P., Klak, C. & Kurzweil, H. 1998. Mesembs of the world. Briza Publications, Pretoria.
- Van Jaarsveld, E.J. & Pienaar, U. de V. 2000. Vygies, gems of the veld. Cactus & Co. Libri, Venegono, Italy.
Credits
Olivia Tyambetyu
Millennium Seed Bank
January 2010
Plant Attributes:
Plant Type: Shrub, Succulent
SA Distribution: Western Cape
Soil type: Loam
Flowering season: Early Summer, Winter
PH: Acid, Neutral
Flower colour: Pink
Aspect: Full Sun
Gardening skill: Easy
Special Features:
Horticultural zones





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