Euphorbia dendroides (Tree Spurge)


Botanical Information

FamilyEuphorbiaceae
GenusEuphorbia
Speciesdendroides
CategoryTropicals
TypeShrub (evergreen)
OriginMediterranean coastal regions.

Details

USDA Hardiness Zone11
USDA Hardiness Ref.
Canadian Hardiness ZoneRequires cold season protection under glass.
Canada Hardiness Ref.
RHS Hardiness ZoneH1c
RHS Hardiness Ref.
Temperature (°C)5 - 10
Temperature (°F)41 - 50
Height2 m
Spread2 m
GrowthFast

Description and Growing Information

General DescriptionHemispherical semi-succulent shrub that can easily be recognized from long distance by its reddish branches.
CultivationGrows best in full sun to partial shade with deep sandy soil. Water moderately from autumn to spring, and during the summer diminish waterings to once a month.
Notable SpecimensCentennial Conservatory, Thunder Bay, Ontario, Canada.
HabitatGrows in exposed, open terrain, on rocky (mostly calcareous) ground, 0 - 600 meters above sea level, but is found occasionally up to 900 meters.
Leaf DescriptionAlternate, clustered at end of branches but somewhat spaced out. Oblong-lanceolate, entire, attenuate at the base, and somewhat mucronate at the tip, rounded or sub-truncate, up to 6.5 cm long and 8 mm wide, sessile, glabrous and with single vein, eventually deciduous when in drought.
Flower DescriptionInflorescences are terminal, umbellate, with 5-8 bifurcate, rays to 5 cm long. Cyathia is sub-sessile, egg-shaped, and 5 mm in size. Each cyathium consists of one female flower, with a three-lobed ovary, and up to six male flowers, surrounded by round glands.
Fruit DescriptionFruit is deeply three-lobed, 5 - 6 cm in width, 7 mm in length, dehiscent, and contains 3 seeds. Seeds are ovoid, laterally compressed, grow to 3 mm, and carry a rounded caruncle.
Colour DescriptionFruit is grey-green, with the seeds within being opaque brown or greyish black. Cyathia is yellowish green. Leaves are light green. Bark ranges from a deep red to reddish brown.
Texture DescriptionFruit and seeds are smooth.

Photographs