Euphorbia pulvinata

Euphorbia pulvinata

Succulentopedia

Euphorbia pulvinata (Pincushion Euphorbia)

Euphorbia pulvinata (Pincushion Euphorbia) is a low-growing and clumping succulent with short, globose to columnar stems. The most common…


FLOWER COLOUR:  
AVERAGE SIZE (H) x (W): 0.5m x 0.9m
FLOWERING TIME:   J F M A M J J A S O N D
FRUITING TIME:   J F M A M J J A S O N D

A dome-shaped succulent consisting of stout, finger-like branches. In the growing plant the base broadens gradually over many years as more branches are added. Every branch or stem has seven or eight acute angled ridges, along the edges of which small, sharp spines occur. All part exude a toxic, milky latex when broken.

GARDEN THEMES:
Formal, rockery, succulent

LANDSCAPING USES:
An attractive addition to a succulent garden or rockery.


Euphorbia pulvinata (Pincushion Euphorbia) – Succulent plants

Euphorbia pulvinata (Pincushion Euphorbia) is an attractive, clumping, globular succulent with short, globose to the columnar stem, up to 30 cm tall for the most common form, and the other form is with few stems and up to 1 m tall. Stems are 7 or 8 (occasionally up to 10) angled with numerous branches from the base. The leaves are linear-lanceolate, up to 3 cm long and the spines are white to purple (depending on the season) and up to 2 cm long. Flowers are dark red-purple, in the male plant up to 5 cm in diameter and in the female plant up to 3 cm in diameter, followed by 3-angled capsule, up to 5 cm in diameter.

Scientific Classification:

Family: Euphorbiaceae
Subfamily: Euphorbioideae
Tribe: Euphorbieae
Subtribe: Euphorbiinae
Genus: Euphorbia

Scientific Name: Euphorbia pulvinata Marloth
Common Names: Pincushion Euphorbia

How to grow and maintain Euphorbia pulvinata (Pincushion Euphorbia) :

Light:
It prefers full to partial sunlight. Provides good sunlight at least 3-5 hours of the day, and turn it regularly so that your plant doesn’t begin to grow lopsided.

Soil:
It grows well in well-draining, gritty soil or cactus potting mix. They are not particular about soil pH, but they cannot tolerate wet soil.

Water:
You can allow the soil to dry out between each watering. Before watering the plant check underneath the pot through the drainage holes to see if the roots are dry. If so then add some water. Do not water too often to prevent overwatering, that can potentially kill it off.

Temperature:
It prefers an optimal temperatures of 60 degrees Fahrenheit – 85 degrees Fahrenheit / 16 degrees Celsius to 29 degrees Celsius.

Fertilizer:
Fertilize every two weeks with a diluted balanced liquid fertilizer during its growing season in the spring and summer. Avoid fertilizing your plant during the fall and winter months.

Propagation:
It can be easily propagated by cuttings. Take cutting in spring, which needs to be dried out for a couple of weeks in shade before potting. This can be tricky, because of the exuding sap. Rooting hormone is recommended with Euphorbias. Also can be propagated from seed, but they can be difficult to germinate.

Pests and Diseases:
Euphorbia may be susceptible to mealybugs, scale insects, occasionally spider mites.


Euphorbia pulvinata - garden

Origin and Habitat: South Africa (Natal), Lesotho. It is located from the south at Queenstown, to the north, through and along Lesotho, the Drakensbergen, Free State and kwazulu Natal up to Zoutpansbergen in the Northern Province, Limpopo, Mpumalanga
Habitat: It grows in predominantly in flat areas on gypseous, limestone or silt plain with a lot of rain, up to 1000 mm per year, and even with snow sometimes. At some locations it is the most dominant vegetation, often growing together with Euphorbia esculenta, Euphorbia mammillaris, Euphorbia cuneata, Acacia sp., Commiphora sp., Maerua sp. , Turraea parvifolia, Boscia minimifolia, Andropogon kelleri, Lactyloctenium robecchii, Crotalaria Fagonia and Cleome brachycarpa.

Accepted name in llifle Database:
Euphorbia pulvinata Marloth
Trans. Roy. Soc. South Africa i. 315 (1909)

Description: It is a low-growing clumping dioecious (having distinct male and female specimens) succulent, that in nature forms impressive giant pulvini (cushions), composed of several thousands of little spiny heads. In the ground it makes a striking cushion to up to 1,5 (or more) meters in height and across. Some very old plants must have 40.000 heads or more. Sometimes several plants are aggregated into masses up to three meters in diameter.
Stem: Short, globose, usually 7-angled (but occasionally up to 10 angled), becoming columnar with numerous branches from the base, branches mostly simple, leafless, spiny 2,5-15 cm long, 2,5-3,5(-5) cm thick, very obtusely rounded at the tips with the apex slightly depressed, green, glabrous angles subacute, slightly crenate, with broad triangular furrows about 2-4 mmdeep between them, which flatten with age The most common form in cultivation has compact fat globular heads that seldom exceed 12 cm in height
Leaves: Rudimentary, 2-30(-50) mm long, linear-lanceolate, acute, deciduous, leaving small white scars.
Spines (modified sterile peduncles): White to purple (depending on the season) 1-2 cm long, solitary and irregularly scattered along the angles, usually 1-1,5 cm apart, sometimes more closely placed, with a few minute scale-like bracts scattered along them when young, glabrous.
Flowers: Dioecious (having solitary cyathia on distinct male and female specimens) Involucres clustered at the apex of the branches, sessile or subsessile, in the male plant about 4-5 mm and in the female about 2-3 mm in diam., shortly and broadly cup-shaped, glabrous, dark red-purple, with 5 glands and 5 transversely oblong toothed or subentire lobes nectar-glands 5-6 distinct, 1-1,5 mm in their greater diam., transversely elliptic-oblong, entire, dark purple ovary sessile, but exceeding the involucre, glabrous styles 1,5-2 mm long, stout, united for nearly or quite half their length, then spreading, 2-lobed at the apex
Fruit: Capsule about 4-5 mm in diameter, sessile, obtusely 3-angled
Seeds: 2-3 mm long, ovoid or somewhat pear-shaped, smooth, glabrous, pale brown.
Remarks: Euphorbia pulvinata has a large area of distribution, and is a very variable species. The plants from the northern distribution area differ clearly from those of the south: one forming dense cushions of up to 30 cm in height, the other with few stems, up to 1 m high (The small one is the most common in cultivation). The difference between populations is the frequency of the appearance in which these forms occur. So it can happen that two individuals of two different populations can look very similar and also, two plants of the same population can look very different. However when you are looking at the whole population, you can see the difference of one population from another.

Subspecies, varieties, forms and cultivars of plants belonging to the Euphorbia pulvinata group

Notes: Euphorbia pulvinata belongs to a group of plants, together with the closely related species Euphorbia ferox and Euphorbia aggregata, which can be recognised by their striking growing-shape. They consist mostly of compact, multiple branched and heavily thorny cushions. These species are closely related, and for an outsider it's very difficult to distinguish them. There are differences, though.

Bibliography: Major references and further lectures
1) Urs Eggli “Illustrated Handbook of Succulent Plants: Dicotyledons” Springer, 2002
2) Hermann Jacobsen “A handbook of succulent plalnts: Abromeitiella to Euphorbia” Blandford Press, 1960
3) James Cullen, Sabina G. Knees, H. Suzanne Cubey “The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass” Cambridge University Press, 11/ago/2011
4) Doreen Court “Succulent Flora of Southern Africa” CRC Press, 01/giu/2000
5) Alain Campbell White, Robert Allen Dyer, Boyd L. Sloane “The succelent Euphorbisae (southern Africa)” Abbey garden press, 1941
6) Werner Rauh “Cultivation and Description of Selected Succulent Plants Other Than Cacti” Smithsonian Institution Press 1984
7) Gibbs Russell, G. E., W. G. Welman, E. Reitief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. v. Wyk & A. Nicholas. “List of species of southern African plants.” Mem. Bot. Surv. S. Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2). 1987.


Euphorbia pulvinata Photo by: Cactus Art
Euphorbia pulvinata Photo by: Valentino Vallicelli
Euphorbia pulvinata Photo by: Valentino Vallicelli

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Cultivation and Propagation: It is a pretty easy species for pot culture. Mature healthy plants are tough, and can also be grown out of doors where frost is not too severe.
Growth rate: It is a relatively rapidly growing species that will make large clumps whit hundreds or even thousands heads given the best conditions.
Soil: It grows well in a very draining mineral potting substrate, but it isn't picky about soil.
Repotting: Use pot with good drainage.
Watering: The area where this plant is native receives rain both in winter and summer, so it can be watered moderately all year around (except in the coldest month of the winter as it rots easily, especially if over wet ). During the summer they enjoy average watering, but do not overwater (Rot prone).
Fertilization: Feed with a high potassium fertilizer in summer.
Hardiness: When dormant, the plant is very cold tolerant (down to nearly -9° C or less), but when left out it is more sensitive to frost.
Exposure: They do need a lot of light to keep their compact growth-form, but different clones vary in their tolerance of full sunshine. However some protection in light shade is recommended during the hottest hours in summer.
Uses: It is an excellent plant for container growing. It always looks good and stays small. It looks fine in a cold greenhouse and frame.
Warning: As with all other Euphorbias when a plant get damaged it exudes a thick white milky sap known as latex. This latex is poisonous, and may irritate skin. Pay extreme attention not to get any in your eyes or mouth.
Cultivated plants must be handled carefully.
Rot: Rot it is only a minor problem with Euphorbias if the plants are watered and “aired” correctly. If they are not, fungicides won't help all that much.
Propagation: It is propagated by cuttings (It branches enthusiastically, and offsets are readily available). If you remove an offset, remember to let it dry for some days, letting the wound heal (cuttings planted too soon easily rot before they can grow roots). Lay it on the soil and insert the stem end partially into the substrate. Try to keep the cutting somewhat upright so that the roots are able to grow downward. It is better to wash the cut to remove the latex.


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