The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.
Common Name: Desert Sumach
Rhus microphylla is a Deciduous Shrub up to 2.00 metres tall.
It has edible and miscellaneous uses.
There are some suggestions that the sap of this species can cause a skin rash in susceptible people, but this has not been substantiated. See also notes in 'Cultivation Details'.
South-western N. America - Texas to Mexico.
Dry rocky hillsides or gravelly mesas, 600 - 1800 metres[
Succeeds in a well-drained fertile soil in full sun[
This species is not very hardy in Britain, it may not succeed outdoors even in the mildest areas of the country[
]. The young growth in spring can be damaged by late frosts.
Plants have brittle branches and these can be broken off in strong winds[
]. Plants are also susceptible to coral spot fungus[
]. Plants in this genus are notably resistant to honey fungus[
Many of the species in this genus are highly toxic and can also cause severe irritation to the skin of some people, whilst other species such as this one are not poisonous. It is relatively simple to distinguish which is which, the poisonous species have axillary panicles and smooth fruits whilst non-poisonous species have compound terminal panicles and fruits covered with acid crimson hairs[
]. The toxic species are sometimes separated into their own genus, Toxicodendron, by some botanists[
A dioecious species - both male and female forms must be grown if fruit and seed are required.
Fruit - raw or cooked[
]. A sour flavour[
]. The dried fruits can be ground up, mixed with water and used to make a jam[
]. The fruit is small with very little flesh, but it is easily harvested and when soaked for 10 - 30 minutes in hot or cold water makes a very refreshing lemonade-like drink (without any fizz of course)[
]. The fruit is about 5mm in diameter[
An oil is extracted from the seeds[
]. It attains a tallow-like consistency on standing and is used to make candles. These burn brilliantly, though they emit a pungent smoke[
The leaves are rich in tannin. They can be collected as they fall in the autumn and used as a brown dye or as a mordant[
Seed - best sown in a cold frame as soon as it is ripe. Pre-soak the seed for 24 hours in hot water (starting at a temperature of 80 - 90c and allowing it to cool) prior to sowing in order to leach out any germination inhibitors[
]. This soak water can be drunk and has a delicious lemon-flavour. The stored seed also needs hot water treatment and can be sown in early spring in a cold frame[
]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Cuttings of half-ripe wood, 10cm with a heel, mid summer in a frame[
Root cuttings 4cm long taken in December and potted up vertically in a greenhouse. Good percentage[
Suckers in late autumn to winter[