Spurges (genusEuphorbia) are a large and variable worldwide genus of more than 1,500 plants that are mostly shrubby, herbaceoussucculents. They vary from flat creepers to shrubs and trees. Some even look like cactus plants.
They afford an acrid, often poisonous milky juice, and some of them are armed with thorns. Most plants of the spurge genus yield powerful emetic and cathartic products.
Fire-on-the-mountain (Euphorbia cyathophora)
Species
White-laced Euphorbia (Euphorbia leucocephala)
Mexican Fireplant (Euphorbia heterophylla)
Sea spurge (Euphorbia paralias)
Euphorbia aaron-rossii : Marble Canyon Spurge
Euphorbia acanthothamnos : Greek Spiny Spurge
Euphorbia agraria : Urban Spurge
Euphorbia albomarginata : Rattlesnake Weed.
Euphorbia amygdaloides : Wood Spurge
Euphorbia antisyphilitica : Wax Plant, Candelilla
Euphorbia bicolor : Snow-on-the-prairie
Euphorbia bifurcata : Forked Spurge
Euphorbia bilobata : Black-seed Spurge, Blackseed Spurge
Euphorbia biumbellata
Euphorbia brachycera : Horned Spurge
Euphorbia brittingeri
Euphorbia caunculata : Waterfall
Euphorbia chamaesula : Mountain Spurge
Euphorbia characias
Euphorbia commutata : Tinted Euphorbia, Tinted Woodland Spurge
Euphorbia corollata : Flowering Spurge
Euphorbia cotinifolia : Mexican Shrubby Spurge, Red Spurge
Euphorbia crenulata : Chinese Caps
Euphorbia cuphosperma
Euphorbia curtisii : Curtis' Spurge
Euphorbia cyathophora : Fire-on-the-mountain, Wild Poinsettia
Euphorbia cyparissias : Cypress Spurge
Euphorbia damarana
Euphorbia davidii : David's Spurge
Euphorbia dendroides : Tree Spurge
Euphorbia dentata : Toothed Euphorbia, Toothed Spurge, Toothedleaf Poinsettia
Euphorbia discoidalis : Summer Spurge
Euphorbia dulcis : Sweet Spurge
Euphorbia epithymoides : Cushion Spurge
Euphorbia eriantha : Beetle Spurge, Mexican Pointsetta
Euphorbia esula : Leafy Spurge, Wolf's Milk, Wolf's-milk
Euphorbia exigua : Dwarf Spurge
Euphorbia exserta : Coastal Sand Spurge
Euphorbia exstipulata : Square-seed Spurge, Squareseed Spurge
Euphorbia exstipulata var. exstipulata : Squareseed Spurge
Euphorbia falcata : Sickle Spurge
Euphorbia floridana : Greater Florida Spurge
Euphorbia fulgens : Scarlet Plume
Euphorbia gaudichaudii : Spurge
Euphorbia X gayeri
Euphorbia graminea : Grassleaf Spurge
Euphorbia haeleeleana: Akoko, Kauai Spurge
Euphorbia helioscopia: Sun Spurge, Madwoman's Milk
Euphorbia helleri : Heller's Spurge
Euphorbia hernariifolia : Spurge
Euphorbia heterophylla : Fire-on-the-mountain, Mexican Fireplant, Painted Euphorbia, Kaliko
Euphorbia hexagona : Sixangle Spurge
Euphorbia incisa : Mojave Spurge
Euphorbia innocua : Velvet Spurge
Euphorbia inundata : Florida Pineland Spurge
Euphorbia ipecacuanhae : American Ipecac
Euphorbia josei : Jose Spurge
Euphorbia lactea : Mottled Spurge
Euphorbia lancifolia : Ixbut
Euphorbia lathyris : *Mole Plant or Caper Spurge
Euphorbia leucocephala : Pascuita, White-laced Euphorbia
Euphorbia longicruris : Wedgeleaf Spurge
Euphorbia lucida : Shining Spurge
Euphorbia macropus : -- Huachuca Mountain Spurge
Euphorbia maculata : Spotted Spurge
Euphorbia marginata : Snow-on-the-mountain, Smoke-on-the-prairie, Variegated Spurge, Whitemargined Spurge
Euphorbia polychroma or Cushion Spurge is even smaller with greenish blue foliage and contrasting lime-yellow floral leaves.
Other euphorbias of note are 'Fireglow', reaching a height of 60-90cms and carrying interesting orangey coloured bracts, which give it is name - they actually appear as though they are the glowing embers of a warming fire.
Euphorbias hold their interest in the garden for months and will last for two weeks as a cut flower in a vase.