This is a tall shrubby type of Euphorbia with very sharp, short, dark brown spines. When I purchased it, it was incorrectly labeled Euphorbia grandicornis. At this time I don't know the exact species.
Plant Type
All Plants, Succulents
Sunlight
bright to full
Moisture
evenly moist to approach dryness
Growing Media
well drained
Temperature
prefers warm but tolerates average house
Stems
The thick stems are dark green, thick and very succulent. The 3-4 angled spines are brown and found in pairs at the tips of the scalloped branches.
Dimensions
The plant I had was around 30" tall by 24" spread, needed to be chopped back because it started to grab and scratch people in the greenhouse. Will get considerably larger.
Propagation
This plant can be rooted from stem cuttings. As is with almost all of the Euphorbia when you take the cutting the plant will bleed a sticky, white sap (not a good substance to get into the eyes, cuts or sensitive skin). The cuttings have rooted best during the hotter parts of the year....Take the cutting... let it callus for a day or so....I use perlite to root it in....bury the cutting in the perlite 2-3 or more inches depending on the size of the cuttings...use a layer of coarse rock to add support to the plant and weight to the pot so the cutting won't tip....with perlite the chance of over watering is almost eliminated...put in a moderate lit area and keep warm...this has worked for me...be patient