General Info – summary

This Tree with smooth green / grey strongly aromatic bark is usually up to 5m high.  Imparipinnate, hairy, resinous Leaves have 3-5 pairs of paired leaflets and the single terminal one is the largest.  Regular, dioecious, 4-merous Flowers are single or may develop in paniculate cymes. They appear with the new leaves and are greenish white.  Fruit is a drupe with a 4 lobed pseudo aril clasping a single black seed.

Description

Commiphora marlothii

Previous Names: Nil

SA Tree No. 278.

Common Names:  (Afr) Papapa, Papierbas-kanniedood, Paperbaskanniedood, Wit Paperbas-kanniedood.  (Eng) Paperbark Corkwood, Paper Tree, Paper-bark Tree, Paper-barked Corkwood.  (Setswana) Mopapama, Mophamaphama, Mophaphame.  (Tshivenda) Mufhafha, Mukarakara.

Family: Burseraceae: (The torchwood family, which include frankincense from Boswellia sacra, myrrh from Commiphora myrrha both of which have an incense like odour).  Neither Boswellia species nor Commiphora myrrha are indigenous in southern Africa.  Non-allergenic resin occurs in most plant tissues.  Worldwide there are about 16 genera and in excess of 500 species, which occur in tropical South America, Malaysia and Africa.  In South Africa Commiphora is the only genus and there are about 20 species that may be regarded as trees.  The Bark is smooth, aromatic and pealing or flaking.  The Leaves are resinous and usually without stipules.  The usually dioecious Flowers have 4 or 5 petals and sepals that are imbricate (having regularly arranged, overlapping edges, as roof tiles).  Flowers are actinomorphic (regular, symmetric) and the Stamens are double or equal to the number of petals.  The superior Ovary has 3-5 carpels with 2 ovules in each and the single Style ends in a capitate (forms like a head) or lobed Stigma.  The pitted Fruit is often an edible drupe.

Name derivation: Commiphora – gum bearer – Greek: kommi – gum and phora – bearer.  marlothii named after Wilhelm Rudolf Marloth (1855-1931) who was a German born, South African Botanist pharmacist and analytical chemist, best known for his Flora of South Africa which appeared in six superbly illustrated volumes between 1913 and 1932.

Conservation: National Status: L C. (Least Concern).  Assessed: 2005 (W. Foden and L. Potter).

Tree

This compact and much branched Tree ranges from 5 (usually) to 13m high and is bigger than most other Commiphora plants.  Trees may be multi stemmed.  This impressive tree is often a thickset, succulent and heavy Bole (trunk). Both the bowl and branches are very smooth.  Young branchlets are densely pilose (furry with soft hairs) to pubescent (with dense fine, short, soft hairs).  The strongly aromatic Bark is dark green (photo 955) or grey.  It peels off in large distinctive paper-like sheets leaving areas that are initially a lighter colour (photo 954).  This rather brittle paper can be written on with a soft pencil.  These sheets may flap audibly in the wind.  Resin ducts and aromatic latex are present in the bark.  Newly cut stems are fragrant.  Young Branchlets are densely hairy, stubby and not spine tipped.

Leaves

In this deciduous tree, the densely, softly hairy dark-green Leaves are imparipinnate (pinnately compound leaf ending in a single leaflet).  The leaves are up to 20cm long and are clustered at branch ends.  They have 3-5 pairs of elliptic to obovate widely spaced Leaflets in addition to the terminal one, which is the largest – up to 8 x 4cm.  Venation is prominent.  The oblong leaflets are rather soft and hairy – especially below.  The Apex is tapering to rounded.  The Base of the terminal leaflet tapers and the bases of the rest of the leaflets are asymmetric and rounded.  The Margin is crenate (shallowly round-toothed or obtusely toothed, scalloped) and coarsely scalloped or serrated (saw-toothed margin with teeth pointing forward).  It may also be finely lobed.  The midrib is prominent below.  The Petiole (leaf stalk) is densely hairy and up to 10cm long.  Petiolules (leaflet stalks) are short (up to 2mm long) and thick.  Stipules (basal appendages of the petiole) are absent.

Flowers

The small yellowish Flowers develop in leaf axils and are single or in axillary inflorescences that appear with the new leaves.  They are actinomorphic (Regular, symmetrical.  The flowers are vertically divisible into similar halves by more than one plane passing through the axis) and dioecious (unisexual floral structures with male and female parts on separate plants).  The pubescent (hairy) Pedicel (stalk of a single flower) is up to 1mm long.  Flower buds are velvety.  A cylindrical Disc (a more or less fleshy or elevated development of the receptacle) is present. The pubescent Calyx has 4 persistent greenish Sepal lobes that are valvate (meeting by the edge without overlapping).  In this bell-shaped flower, the Corolla has 4 Petals that are externally hairy and alternate with the Sepals.  In the larger Male Flowers, the 8 Stamens are arranged in two whorls with the outer whorls being opposite the petals.  The Anthers have longitudinal slits that are introrse (the line of dehiscence faces towards the centre of the flower).  In the male flower, the ovary is rudimentary.  Staminodes (sterile stamens) are present in the smaller Female Flowers.  Here the 2-locular superior Ovary has a short Style and the Stigma is capitate (shaped like a head).  (Sep-Nov).

Fruit

The green, brownish reddish or yellow and minutely sharp tipped Fruit is a Drupe (a fleshy, 1-seeded indehiscent fruit with the seed enclosed in an endocarp), which is more or less spherical or elliptical, up to 12 x 8mm and matures to a red colour.  Here the endocarp (the inner layer of the pericarp or fruit wall is not stony like a peach but is membranous – like an apple).  It is partly enveloped by a yellowish arillode (false-aril – a structure in certain seeds that resembles an aril but is developed from the micropyle of the ovule as opposed to the stalk).  The arillode has 4 arms clasping the fruit which contains the single black seed.  Two of these arms reach almost to the apex of the fruit and the remaining 2 are shorter and of different lengths.

Distribution & Ecology

This Tree (together with Commiphora woodii) occurs in arid bushveld, on dry mountain slopes and rocky hills – including on granite (an igneous rock that develops underground when silica rich, molten rock cools).  It may be less common in woodlands.  It grows naturally in Gauteng, Mpumalanga, Limpopo, Botswana, Mozambique (limited to the central west) and Zimbabwe e.g., within the granite hills of Matobo National Park: located less than 40km to the south of Bulawayo.  This plant is thus endemic (restricted to a particular geographic location) in southern Africa.

Ethnobotany

The Wood has a relatively low density and has a good texture.  Newly cut Wood is fragrant, and the heartwood is an attractive light brown colour.  The papery Bark can be made into rather brittle writing paper that is suitable for a soft pencil but is relatively brittle.  The fresh Fruit is edible or used to make jam or jelly.  The sweet juice within the Root is extractable.

References

Boon, R. 2010. Pooley’s Trees of eastern South Africa. Flora and Fauna Publications Trust, Durban.

Burrows, J.E., Burrows, S.M., Lotter, M.C. & Schmidt, E. 2018. Trees and Shrubs Mozambique.  Publishing Print Matters (Pty) Ltd.  Noordhoek, Cape Town.

Coates Palgrave, M. 2002. Keith Coates Palgrave Trees of Southern Africa, edn 3. Struik, Cape Town.

Foden, W. & Potter, L. 2005. Commiphora marlothii Engl. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2021/12/26.

Lawrence, G. H. M, 1951. Taxonomy of Vascular Plants. The Macmillan Company, New York. Tenth Printing 1965.

Palmer, E. & Pitman, N. 1972. Trees of southern Africa. Balkema, Amsterdam, Cape Town.

Schmidt, S. Lotter, M. & McCleland, W. 2002. Trees and Shrubs of Mpumalanga and the Kruger National Park. Jacana, Johannesburg.

van Wyk, B. & van Wyk, P. 1997 Field guide to Trees of Southern Africa. Struik, Cape Town.

https://plants.jstor.org/compilation/commiphora.marlothii

http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=133330

http://eol.org/data_objects/21957364

http://posa.sanbi.org/flora/browse.php?src=SP

https://af.wikipedia.org/wiki/Hermann_Wilhelm_Rudolf_Marloth

https://plants.jstor.org/