Scientific Name    

Asclepias fascicularis Decne.                      

Family

Apocynaceae (ex-Asclepiadaceae) 

General

      A narrow-leafed perennial herb, with toxic, milky sap.  The flowers attract a diversity of insects.  The flowers and folliage are food for the monarch butterfly (Danaus plexippus).  This plant is easily grown from seeds (but grows fairly slowly), and is an excellent choice for a butterfly garden.                            

CI

    Observed commonly in disturbed areas, for example, along paths or at the edge of landscaped zones.  Not extremely common.  On campus, the flowers have been observed to attract tarantua hawk wasps (probably genus Pepsis, family Popilidae).  These impressive (and large) insects prey on tarantulas as a food source for their growing larvae.  Observed blooming in June through September.           

 

References

      See this species on CalFlora.

      The Jepson Manual (2012:  204, Asclepias, by Thomas J. Rossatti and Carold A. Hoffman).

      Dale (2000:  49).

      McAuley (1996:  183).

asclepiasfascicularis-26feb2003Asclepias fascicularis flower heads, along path just to the west of University Glen, near where water collected forming a temporary pond (26 February 2003).

asclepiasfascicularis-6june2003-1Asclepias fascicularis flower heads, along path just to the west of University Glen, near where water collected forming a temporary pond (29 June 2003).

asclepiasfascicularis-6june2003-2Asclepias fascicularis, along path just to the west of University Glen, near where water collected forming a temporary pond (29 June 2003).

 

asclepias-fascicularis-22july2015-1

Asclepias fascicularis along pathway on crest of hill to south of Camarillo Park entrance area (22 July 2015).

asclepias-fascicularis-11mar2015-1Asclepias fascicularis with monarch butterfly caterpillar, to side of gravel path along northern margin of large park north of University Glen, CI campus (11 March 2015).

 

asclepias-fascic…ularis-12june2016-10Asclepias fascicularis along crest line of hill that separates University Glen from University Park, CI campus.  Note maturing seed pods and abundant Deinandra fasciculata (yellow flowers) (12 June 2016).

asclepias-fascic…ularis-12june2016-11Asclepias fascicularis along crest line of hill that separates University Glen from University Park, CI campus  (12 June 2016).

asclepias-fascicularis-12june2016-3Asclepias fascicularis along crest line of hill that separates University Glen from University Park, CI campus.  Note maturing seed pods (12 June 2016).

asclepias-fascicularis-12june2016-6Asclepias fascicularis along crest line of hill that separates University Glen from University Park, CI campus (12 June 2016).

asclepias-fascicularis-20may2014-4Asclepias fascicularis along crest line of hill that separates University Glen from University Park, CI campus (20 May 2014).