Telopea mongaensis, commonly known as the Monga waratah or Braidwood waratah, is a shrub or small tree in the family Proteaceae. Endemic to Australia, it grows at high altitude in south eastern New South Wales, where it is often seen in moist areas at the edge of rainforest or by streams in eucalyptus forests. Growing to 6 m (20 ft) high, it has narrow green leaves 4–18 cm (1.6–7.1 in) in length, and 0.5–2 cm (0.20–0.79 in) wide. In spring bears many red flowerheads, each made up of 28 to 65 individual flowers.
In the garden, T. mongaensis grows in soils with good drainage and ample moisture in part-shaded or sunny positions. Several commercially available cultivars that are hybrid forms with T. speciosissima have been developed.
How to grow it
Initial attempts to cultivate it by Cheel and Joseph Maiden in Sydney were unsuccessful. Telopea mongaensis is more tolerant of shade, heavier soils and cooler climates than its more showy relative. It grows as a more compact plant of around 2 m (6.6 ft) in height in full sun. It is frost tolerant and has been grown in southern England, and has been awarded an Award of Merit by the Royal Horticultural Society in 1980. It attracts birds to the garden.
Telopea 'Braidwood Brilliant' is a hybrid between this species and the showy Telopea speciosissima that was first grown in 1962 and registered with the Australian Cultivar Registration Authority (ACRA) in 1974. Bred by the Reverend Colin Burgess, parent plant stock was selected from cold areas with the aim of breeding a hardy plant. The pollen was taken from T. speciossissima plants from Wentworth Falls in the Blue Mountains and used on T. mongaensis from Braidwood. The plant grows to around 4 m (13 ft) tall and has flower heads 6–8 cm (2.4–3.1 in) in diameter. They appear to tolerate frosts down to a temperature of −6 C readily.
Where it grows
This plant may be seen between Fitzroy Falls in the north, and Monga National Park to the south. Its habitat is on the margins of temperate rainforest or in wet eucalypt forest, where it may be found along creeks or on mountain slopes, at an altitude of 540 to 760 m (1,770 to 2,490 ft). It grows on sandy soils of alluvial origin. It is often associated with such trees as brown barrel (Eucalyptus fastigata), silvertop ash (E. sieberi), broad-leaved peppermint (E. dives), Sydney peppermint (E. piperita), and the understorey plants pinkwood (Eucryphia moorei), soft tree fern (Dicksonia antarctica), coral fern (Gleichenia), mountain devil (Lambertia formosa) and hairpin banksia (Banksia spinulosa). The annual rainfall where it grows is 1,000–1,100 mm (39–43 in).
Text excerpted from the Wikipedia article Telopea mongaensis by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.