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WILD LOBAU
SPURGE FAMILY

THE SPURGE FAMILY (Euphorbiaceae)

This is a large family of flowering plants with 300 genera and around 7,500 species. Most spurges are herbs, but some, especially in the tropics, are shrubs or trees. Some are succulent and resemble cacti.

Members of the genus Euphorbia (to which the species found here in the Lobau belong) have varying leaf forms but are mainly characterised by their unusual flower structure and milky latex exuded from stem and leaves when broken. This latex is poisonous and can cause skin irritations if the plant is handled.

The flowers consist of a highly specialized "false flower" made up of several ‘true’ flowers, each separately either male or female. This false flower is usually a small, cup-like involucre consisting of fused-together bracts and peripheral nectary glands surrounding a ring of male flowers, each a single stamen. In the middle stands a female flower: a single pistil with branched stigmas. This whole arrangement resembles a single flower but the appearance is bizarre.

(source: Wikipedia)

Click on a thumbnail photo to go to full photo and description.

Cypress Spurge in Lobau Siberian Spurge in Lobau
Lobau Location
QUICK KEY

Leaf Types (Simplified)

Icon
Shape
Veins
Simple parallel leaf-vein diagram
Simple
Parallel
Simple pinnate leaf-vein diagram
Simple
Pinnate
Lobed pinnate leaf-vein diagram
Lobed
Pinnate
Compound pinnate leaf-vein diagram
Compound
Pinnate
Trifoliate3-pinnate leaf-vein diagram
Trifoliate
3-Pinnate
Simple palmate leaf-vein diagram
Simple
Palmate
Lobed palmate leaf-vein diagram
Lobed
Palmate
Compound palmate leaf-vein diagram
Compound
Palmate
Other and various leaf-vein arrangments diagram
Other
Various

Flower Types (Simplified)

Icon
Symmetry
Petals
Radial symmetry and 3 petals flower type diagram
Radial
3 or multiple 3s
Radial symmetry and 4 petals flower type diagram
Radial
4
Radial symmetry and 5 separate petals flower type diagram
Radial
5, Separate
Radial symmetry and 5 tubular petals flower type diagram
Radial
5, Tubular
Radial symmetry and 5 tubular base flower type diagram
Radial
5,Tubular base
Radial symmetry and 5 bell-shape petals flower type diagram
Radial
5, Bell shape
Bilateral symmetry and 5 separate petals flower type diagram
Bilateral
5, Separate
Bilateral symmetry and 5 lipped petals flower type diagram
Bilateral
5, Lipped
Bilateral symmetry and winged petals flower type diagram
Bilateral
Butterfly form
Bilateral symmetry and tubular flower type diagram
Bilateral
Tubular
Spurred flower type diagram
.
Spurred
Stellate composite flower type diagram
Stellate
Composite
Structured clusters flower type diagram
Structured Clusters
5, small
Anomalous flower type diagram
Anomalous
.
Inconspicuous flower type diagram
Inconspicuous
.

Inflorescence Types (Simplified)

Icon
Type
Capitulum
Umbel flower head inflorescence type diagram
Umbel
Spike-like flower head inflorescence type diagram
Spike-like
Branched flower head inflorescence type diagram
Branched
Whorled flower head inflorescence type diagram
Whorled
Clustered flower head inflorescence type diagram
Clustered
Single

Cypress Spurge
 in Lobau

© 2011 Margaret Eros

LEAF TYPE
PETAL TYPE
INFLORES- CENCE TYPE
HEIGHT OF PLANT
FLOWERING MONTH
HABITAT
PHOTO LOCATION
  • diagram of 
<!--Next: FOR BLIND LEAF SHAPE ICON.-->
simple 
<!--Next brown section: FOR BLIND LEAF VEIN ICON.-->
 leaf shape and 
pinnate 
vein structure
    • diagram of 
<!--Next: FOR BLIND POPUP LEAF SHAPE.-->
simple 
leaf shape 
<!--Next: FOR BLIND POPUP LEAF VEIN ICON.-->
and 
pinnate 
vein structure
    • LEAF TYPE
    • Shape:
    • --simple (undivided/entire).
    • Veins:
    • --pinnate (main central vein with side branches).
    • This plant:
    • Short, narrow leaves (4cm by 1-2mm), non-flowering branches with soft needle-like leaves resembling fir or cypress – hence the name
  • 
Anomalous symmetry and petals
flower type diagram
    • 
Anomalous symmetry and petals
flower type diagram
    • FLOWER TYPE
    • Symmetry:
    • --anomalous (flower structure is bizarre and doesn’t fit into standard categories)
    • Petals:
    • .
    • This plant:
    • Green (later yellow, pink, red) bracts form ‘cup’ holding male and femal parts of flower, also distinctive crescent-shaped nectaries (see !D! button)
  • 
<!--Next: FOR BLIND INFLORESENCE ICON. -->
Umbel 
inflorescence diagram
    • Umbel 
inflorescence diagram
    • INFLORESCENCE TYPE
    • Umbel
    • --flowers and flower clusters arranged on flower stems that radiate like spokes of an umbrella).
    • This plant:
    • Each flowering stem has 9-15 flower stalks (peduncles) forming a spreading umbel
  • 15 to 35 cm
  • Apr May Jun Jul Aug
  • Dry grassland

    Fields, wayside

    • For more information, go to the “Habitats & such” tab in the menu bar.
  • diagram of photo location in the Lobau
    • diagram of photo location in the Lobau
Cypress Spurge
Euphorbia cyparissias
Other common name(s):
German name(s): Zypressen-Wolfsmilch
ITIS Serial #: 28061
Date:
03 May, 2011

Cypress spurge is a native of Europe and it thrives in open, disturbed areas and dry grassland. It has soft, narrow leaves that, particularly on non-flowering stems, look like a branch of fir or cypress (see !F! button below). The flowers are unusual in form, the petal-like bracts greenish yellow in colour to begin with, turning pink and then deep red as the flower matures. The main attraction for pollinators are the waxy yellow nectaries, each a horned crescent shape but arranged in a circle giving the impression of a tiny fleshy flower. The other flower parts are difficult to discern with the naked eye but the fruit develops into a very visible warty structure, eventually exploding and shooting the seeds 4-5 metres from the parent plant. Seeds also possess an oily attachment, attracting ants that can aid dispersal. The plant additionally reproduces through lateral root buds, which allow it to spread densely.

When damaged, the plant exudes poisonous latex that protects it from being eaten and heals the wound but it is a serious irritant to the human skin, particularly if in contact with eyes, and can produce painful blisters. It is instinctively avoided by cattle but can poison them if inadvertently eaten with hay.

The rust fungal parasite, Uromyces pisi, uses Cypress Spurge as a host and completely hi-jacks its metabolism, preventing it from flowering and causing it to grow in a different way, tall, upright and with broader leaves, favouring the spread of the fungus. Infected individuals can often be seen amongst the healthy ones and can be easily mistaken for a different species. (see !P! button below)

  • !D!
    • individual flowers of Cypress Spurge each with 4 yellow nectaries  and swelling ‘fruit’ capsule
    • individual flowers, each with 4 yellow nectaries in flower-like arrangement and swelling ‘fruit’ capsule
  • !L!
    • late and post flowering bracts turning pink, orange and later red
    • late and post flowering bracts turning pink (later red) with non-flowering stems looking like fir branches
  • !P!
    • Cypress spurge infected with rust fungus, Uromyces pisi,  showing completely modified growth form
    • plant infected with rust fungus, Uromyces pisi, showing completely modified growth form
  • !B!
    • Mature flower turning orange and showing sub-branching at tip
    • Mature flower turning orange and showing typical sub-branching at tip

Siberian Spurge
 in Lobau

© 2011 Margaret Eros

LEAF TYPE
PETAL TYPE
INFLORES- CENCE TYPE
HEIGHT OF PLANT
FLOWERING MONTH
HABITAT
PHOTO LOCATION
  • diagram of 
<!--Next: FOR BLIND LEAF SHAPE ICON.-->
simple 
<!--Next brown section: FOR BLIND LEAF VEIN ICON.-->
 leaf shape and 
pinnate 
vein structure
    • diagram of 
<!--Next: FOR BLIND POPUP LEAF SHAPE.-->
simple 
leaf shape 
<!--Next: FOR BLIND POPUP LEAF VEIN ICON.-->
and 
pinnate 
vein structure
    • LEAF TYPE
    • Shape:
    • --simple (undivided/entire).
    • Veins:
    • --pinnate (main central vein with side branches).
    • This plant:
    • 4-6mm wide, narrow leaves, bluish-green, leathery texture, spiny tips
  • Anomalous symmetry and petals
flower type diagram
    • Anomalous symmetry and petals
flower type diagram
    • FLOWER TYPE
    • Symmetry:
    • --anomalous (flower structure is bizarre and doesn’t fit into standard categories)
    • Petals:
    • .
    • This plant:
    • 2 greenish-yellow, pointed, petal-like bracts; waxy-yellow, oval nectaries
  • 
<!--Next: FOR BLIND INFLORESENCE ICON. -->
Umbel 
inflorescence diagram
    • Umbel 
inflorescence diagram
    • INFLORESCENCE TYPE
    • Umbel
    • --flowers and flower clusters arranged on flower stems that radiate like spokes of an umbrella).
    • This plant:
    • Individual leaf stalks in the umbel sometimes divided and sub-divided at tip. (see !D! button)
  • 15 to 40 cm
  • Apr May Jun
  • Dry grassland

    • For more information, go to the “Habitats & such” tab in the menu bar.
  • diagram of photo location in the Lobau
    • diagram of photo location in the Lobau
Siberian Spurge
Euphorbia seguieriana
Other common name(s):
German name(s): Steppen-Wolfsmilch
ITIS Serial #:
Date:
18 May, 2011

This is a protected plant , rare in this part of the world.

It is poisonous, like all spurges, producing milky latex when damaged that can cause serious irritations on contact, especially to the eyes.

Perennial plant, spreads by means of rhizomes as well as seeds. Upright, unbranching stems, leaves wider than those of Cypress Spurge with spiny tips, blue-green colour and leathery texture.

Flowers with 2 pointed bracts, smooth, globular fruit capsule, explosive when ripe, shooting seeds considerable distance from parent plant.

  • !W!
    • 
upright, unbranching stems of Siberian spurge with elongated, ovate leaves and umbels of yellow-green flowers
    • upright, unbranching stems with elongated, ovate leaves and umbels of yellow-green flowers
  • !D!
    • 
flowers of Siberian spurge arranged in an umbel
    • flowers arranged in leaf axils and terminal umbel