Common Name: Woollypod Milkweed

General Information

Asclepias eriocarpa is an erect, herbaceous perennial plant producing a cluster of rather stout, unbranched or lightly-branched stems 40 - 100cm tall[].
The plant is harvested from the wild for local use as a food, medicince and source of fibre. Like most, if not all Asclepias species, the plants are likely to have been utilized for foods and other materials by the native North American tribes. See Asclepias syriaca for some idea of these potential uses[].

Known Hazards

Although no specific reports have been seen for this species, many, if not all, members of this genus contain toxic resinoids, alkaloids and cardiac glycosides. They are only toxic if eaten in large quantities, causing vomiting, stupor, weakness and spasma[, ].
The plants are usually avoided by grazing animals[].
The plant is said to be poisonous to sheep[].

Botanical References

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Range

South-western N. America - California, Baja California

Habitat

Dry barren places; at elevations below 2,000 metres[]. Adobe flats, rocky barrens, open woods, fields, stream banks, spreading to roadsides[].

Properties

Edibility Rating
Medicinal Rating
Other Uses Rating
Habit	Perennial
Height	0.90 m
Pollinators	Bees, Insects, Lepidoptera
Cultivation Status	Wild

Cultivation Details

Asclepias eriocarpa is a plant of dry Mediterranean climates with hot summers and cool or even cold winters and most precipitation falling in the cooler months. Outside of this type of climate, the plant will require a well-drained soil and hot summers, with some protection in cold winters, if it is to thive. This protection can often be applied as a mulch, though it would need to be removed before new growth begins in the spring otherwise slug damage is very likely to occur[].
Prefers a well-drained light rich or peaty soil in full sun[, ]. Succeeds in poor soils.
Many members of this genus seem to be particularly prone to damage by slugs. The young growth in spring is especially vulnerable, but older growth is also attacked and even well-established plants have been destroyed in wet years[].
Plants resent root disturbance and are best planted into their final positions whilst small[].
The flower of many members of this genus can trap insects between its anther cells - the struggles of the insect in escaping (especially bees and wasps) pulls with it the pollinium (sacs of pollen) which are then transported to the next flower and deposited there, ensuring pollination of the flower[, ].

Edible Uses

A gum obtained from the latex in the stems can be used for chewing[, , , , ]. It is usually boiled in water first until it coagulates and is sometimes mixed with oil[].

Medicinal

A decoction of the plant, and a salve made from it, is used in the treatment of colds[].

The milky sap is applied on a regular basis to corns in order to gradually remove them[]. It is also applied to cuts, sores and warts[].

The powdered dried roots are inhaled to cause sneezing[].

Smoke from the burning dried plant is inhaled as a treatment for asthma[].

Other Uses

A fibre from the stems is used for ropes, clothing etc[, , , , ]. The fresh stems are soaked in water, or the dried and decaying stems basted with boiling water, in order to remove the fibre[].

Rubber can be made from latex in the stems and leaves[, , , , ]. The leaves contain up to 2.4% latex[].

Propagation

Seed - best sown in a greenhouse as soon as it is ripe in the autumn or in late winter[, ]. We have also had good results from sowing the seed in the greenhouse in early spring[], though stored seed might need 2 - 3 weeks cold stratification[]. Germination usually takes place in 1 - 3 months at 18°c[]. As soon as the seedlings are large enough to handle, prick them out into individual pots and grow them on in the greenhouse for their first winter. Plant out when they are in active growth in late spring or early summer and give them some protection from slugs until they are growing away strongly.
Division in spring. With great care since the plant resents root disturbance. Pot the divisions up and place them in a lightly shaded position in the greenhouse until they are growing away strongly, then plant them out in the summer, giving them some protection from slugs until they are established..
Basal cuttings in late spring. Use shoots about 10cm long with as much of their white underground stem as possible. Pot them up individually and place them in a lightly shaded position in a greenhouse until they are rooting and growing actively. If the plants grow sufficiently, they can be put into their permanent positions in the summer, otherwise keep them in the greenhouse until the following spring and when they are in active growth plant them out into their permanent positions. Give them some protection from slugs until they are established.