PlantPeers
Back to Catalog
No image available
Pittosporaceae FAMILY

Pittosporum tenuifolium

Pittosporum tenuifolium

Edibility
2/5
Medicinal
1/5

Safety & Hazards

This plant contains saponins[1, 2]. Although poisonous, saponins also have a range of medicinal applications and many saponin-rich plants are used in herbalism (particularly as emetics, expectorants and febrifuges) or as sources of raw materials for the pharmaceutical industry. Saponins are also found in a number of common foods, such as many beans. Saponins have a quite bitter flavour and are in general poorly absorbed by the human body, so most pass through without harm. They can be removed by carefully leaching in running water. Thorough cooking, and perhaps changing the cooking water once, will also normally remove most of them. However, it is not advisable to eat large quantities of raw foods that contain saponins. Saponins are much more toxic to many cold-blooded creatures, such as fish, and hunting tribes have traditionally put large quantities of them in streams, lakes etc in order to stupefy or kill the fish and make them easy to catch[PFAF].

Cultivation Details

HabitEvergreen Tree
GrowthMedium

Pittosporum tenuifolium is hardy to about -10°c[3], it is tender outside the milder areas of Britain, but often self-sows when happy. Plants have reached a height of 9 metres in a sheltered position in eastern England[4]. Succeeds in most well-drained soils of reasonably good quality in full sun or light shade[5, 6]. Succeeds in dry soils. Fairly tolerant of maritime exposure[7, 8], but it can be killed by cold winds[3]. A very ornamental plant[5], there are many named varieties[6]. Very amenable to pruning, plants can be cut right back into old wood if required[6]. Although flowers usually appear to be hermaphrodite, many species of Pittosporum are functionally dioecious, with individual specimens bearing mainly or totally flowers of one sex only. Even so, occasional functionally hermaphrodite flowers will appear and, in at least some species, these flowers can be self-compatible and produce fertile seed even in the absence of any other plants of that species[9]. The species in this genus are also very likely to hybridize with other members of the genus[6]. When growing a species from seed it is important to ensure that the seed either comes from a known wild source, or from isolated specimens in cultivation. Plants are widely cultivated for their foliage which lasts a long time in water and is used in flower arranging[4, 7]. The flowers are honey-scented, the aroma being strongest in the evening[4, 10]. Plants in this genus are notably resistant to honey fungus[6].

Propagation

Seed - sow when ripe in the autumn or in late winter in a warm greenhouse[11, 6]. The seed usually germinates freely. Prick out the seedlings into individual pots when they are large enough to handle, move the plants to a cold frame as soon as they are established and plant out late in the following spring[11]. Consider giving them some protection from the cold during their first winter outdoors. Cuttings of half-ripe wood, 5 - 7cm with a heel, mid summer in a frame. Poor to fair percentage[11]. Basal ripewood cuttings late autumn in a cold frame[6]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Pittosporum+tenuifolium>

Pollinators

Insects

References

  1. [1]Australian Medicinal Plants. — Lassak. E. V. and McCarthy. T. · New Holland Publishers · 2001 · ISBN 1876334703 ↩︎A very good and readable guide to the subject.
  2. [2]Flora of Victoria. — Ewart. A. J. · University Press; Melbourne · 1930 ↩︎A flora of eastern Australia, it is rather short on information that is useful to the plant project.
  3. [3]Shrubs. — Phillips. R. & Rix. M. · Pan Books · 1989 · ISBN 0-330-30258-2 ↩︎Excellent photographs and a terse description of 1,900 species and cultivars.
  4. [4]Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. — Bean. W. · Murray · 1981 · ISBN - ↩︎A classic with a wealth of information on the plants, but poor on pictures.
  5. [5]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
  6. [6]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
  7. [7]Shelter Trees and Hedges. — Rosewarne experimental horticultural station. · Ministry of Agriculture, Fisheries and Food · 1984 · ISBN - ↩︎A small booklet packed with information on trees and shrubs for hedging and shelterbelts in exposed maritime areas.
  8. [8]Ornamental Shrubs, Climbers and Bamboos. — Thomas. G. S. · Murray · 1992 · ISBN 0-7195-5043-2 ↩︎Contains a wide range of plants with a brief description, mainly of their ornamental value but also usually of cultivation details and varieties.
  9. [9]Revision of Pittosporum (Pittosporaceae) in Australia — Cayzer L.W.; Crisp M.D. & Telford I.R.H. · 2000 ↩︎A comprehensive review of the genus in Australia
  10. [10]The RHS Gardener's Encyclopedia of Plants and Flowers — Brickell. C. · Dorling Kindersley Publishers Ltd. · 1990 · ISBN 0-86318-386-7 ↩︎Excellent range of photographs, some cultivation details but very little information on plant uses.
  11. [11]Propagation of Trees, Shrubs and Conifers. — Sheat. W. G. · MacMillan and Co · 1948 · ISBN - ↩︎A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
  12. [12]Flora of New Zealand. — Allan. H. H. · Government Printer, Wellington. · 1961 · http://floraseries.landcareresearch.co.nz/pages/Book.aspx?fileName=Flora%201.xml · ISBN - ↩︎The standard work, in 5 volumes though only the first two are of interest to the plant project. Very good on habitats. There is also an on-line version.
  13. [13]The Australian and New Zealand Species of Pittosporum — Cooper R.C. · 1956 ↩︎Rather dated, but still an excellent treatment.
  14. [14]Plants of New Zealand. — Laing. and Blackwell. · Whitcombe and Tombs Ltd · 1907 · ISBN - ↩︎An old flora of New Zealand in a readable style. Some details of plant uses.
  15. [15]Native Edible Plants of New Zealand. — Crowe. A. · Hodder and Stoughton · 1990 · ISBN 0-340-508302 ↩︎A very well written and illustrated book based on the authors own experiments with living on a native diet.
  16. [16]People Plants Database — https://maoriplantuse.landcareresearch.co.nz/WebForms/default.aspx ↩︎An online database of New Zealand plants and their Maori names and uses. An excellent information source.
  17. [PFAF]Plants for a Future — pfaf.org ↩︎