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Asclepias eriocarpa

Common name:	Woollypod Milkweed	Family:	Asclepiadaceae
Author:	Benth.	Botanical references:	71
Synonyms:	Asclepias kotolo, Asclepias fremontii (Torr. ex Gray.)
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[274]. They are usually avoided by grazing animals[274]. The plant is said to be poisonous to sheep[1].
Range:	South-western N. America - California
Habitat:	Dry barren places below 2000 metres[71].
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	2

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	A. eriocarpa var. microcarpa[B,P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Indian Milkweed [B], Milkweed [E], Woollypod Milkweed [P],
Epithets:	From a Dictionary of Botanical Epithets
	eriocarpa = woolly fruits;
Systematics:	From a USDA Plants Database
	Order: Gentianales. Milkweed family
Other Range Info:	From the Ethnobotany Database
	Us(Amerindian); Us(Luiseno)

Physical Characteristics

Perennial growing to 0.9m. It is hardy to zone 8. It is in flower from July to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees, insects and Lepidoptera (Moths & Butterflies). We rate it 2/5 for edibility and 2/5 for medicinal use.

The plant prefers light (sandy) soils, requires well-drained soil and can grow in nutritionally poor soil. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It requires dry or moist soil.

Habitats and Possible Locations

Cultivated Beds.

Edible Uses

Gum.

A gum obtained from the latex in the stems can be used for chewing[46, 61, 92, 161, 177]. It is usually boiled in water first until it coagulates and is sometimes mixed with oil[257].

Medicinal Uses

Disclaimer

Antiasthmatic; Skin; Sternutatory; Warts.

A decoction of the plant, and a salve made from it, is used in the treatment of colds[257].
The milky sap is applied on a regular basis to corns in order to gradually remove them[257]. It is also applied to cuts, sores and warts[257].
The powdered dried roots are inhaled to cause sneezing[257].
Smoke from the burning dried plant is inhaled as a treatment for asthma[257].

Other Uses

Fibre; Latex.

A fibre from the stems is used for ropes, clothing etc[46, 61, 92, 95, 257]. The fresh stems are soaked in water, or the dried and decaying stems basted with boiling water, in order to remove the fibre[257].
Rubber can be made from latex in the stems and leaves[46, 61, 92, 161, 177]. The leaves contain up to 2.4% latex[112].

Cultivation details

Prefers a well-drained light rich or peaty soil in full sun[1, 200]. Succeeds in poor soils.
This species is not very hardy in Britain, the plants may need root protection in severe winters[1] but if this is applied as a mulch then it should be removed before new growth begins in the spring because plants are particularly at risk from slugs[K].
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[K].
Plants resent root disturbance and are best planted into their final positions whilst small[134].
The flower of many members of this genus can trap insects between its anther cells, the struggles of the insect in escaping ensure the pollination of the plant[207].

Propagation

Seed - best sown in a greenhouse as soon as it is ripe in the autumn or in late winter[134, 169]. We have also had good results from sowing the seed in the greenhouse in early spring[K], though stored seed might need 2 - 3 weeks cold stratification[134]. Germination usually takes place in 1 - 3 months at 18°c[134]. 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.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[C] Taxon data. from the CalFlora database.
Images from the CalPhoto database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for the family Asclepiadaceae.

[CHINA] Data Very detailed botanical/identification info. from the Flora of China.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[46] Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[71] Munz. A California Flora. University of California Press 1959
An excellent flora but no pictures. Not for the casual reader.

[92] Balls. E. K. Early Uses of Californian Plants. University of California Press 1975 ISBN 0-520-00072-2
A nice readable book.

[95] Saunders. C. F. Edible and Useful Wild Plants of the United States and Canada. Dover Publications 1976 ISBN 0-486-23310-3
Useful wild plants of America. A pocket guide.

[112] Whiting. A. G. A Summary of the Literature on Milkweeds (Asclepias spp) and their utilization.
A technical paper covering the many uses of the genus Asclepias.

[134] Rice. G. (Editor) Growing from Seed. Volume 2. Thompson and Morgan. 1988
Very readable magazine with lots of information on propagation. An interesting article on Ensete ventricosum.

[161] Yanovsky. E. Food Plants of the N. American Indians. Publication no. 237. U.S. Depf of Agriculture.
A comprehensive but very terse guide. Not for the casual reader.

[169] Buchanan. R. A Weavers Garden.
Covers all aspects of growing your own clothes, from fibre plants to dyes.

[177] Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984 ISBN 3874292169
An excellent book for the dedicated. A comprehensive listing of latin names with a brief list of edible parts.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[207] Coffey. T. The History and Folklore of North American Wild Flowers. Facts on File. 1993 ISBN 0-8160-2624-6
A nice read, lots of information on plant uses.

[257] Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998 ISBN 0-88192-453-9
Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.

Readers Comments

The Milkweeds

Sheila Chmuhalek (schmuhal@granite.mb.ca) Sat 27 Sept 1997

I found your web site while I was searching for information on milkweed, and the milkweeds page showed up. I am a professor of textiles at the University of Manitoba in Canada. Congratulations on having such an interesting site. I'll be back.

Has your group thought about plants as dyes? I found the page on fibre but was surprised that dyes weren't mentioned. If anyone's interested, Milkweed is a terrific dye source, as well.

Cross references: Genera: Asclepias. Web-pages: The Milkweeds.

Plant Rennet

Rich (pfaf@scs.leeds.ac.uk) Sat Apr 15 16:59:27 2000

According to VegSoc, in the past, fig leaves, melon, wild thistle and safflower have all supplied plant rennets for cheese making.

agsieve also has information about another plant source, using the juice from the plant as a coagulant.

Cross references: Plants: Carduus nutans, Carthamnus tinctorius, Cirsium arvense, Cirsium vulgare, Cynara cardunculus, Cynara scolymus, Drosera rotundifolia, Ficus carica, Galega officinalis, Galium verum, Fumaria officinalis, Oxalis acetosella, Pinguicula vulgaris, Pyrularia edulis , Rhus chinensis, Rumex acetosa, Urtica dioica, Withania somnifera.

The Milkweeds

David Raymond (draymond@cats.ucsc.edu) Wed May 30 00:17:57 2001

I ran across an article on commercial trials of milkweed as a kapok -fluff-producer in the US. I will try to track it down for you. The US military, or agriculture department, initially looked at milkweed as a source for a petroleum substitute in the event of war. As you note, it is not very productive in that respect. So there is now research on the use of the fluff, which is as warm as down but does not mat down when it gets wet. Keep up the good work. David Raymond

Cross references: Genera: Asclepias. Web-pages: The Milkweeds.

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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