Prairie Plant of the Week - Siphium laciniatum (Compass Plant)

Siphium laciniatum (Compass Plant)

photograph - © Bruce A. Morrison

(click on image for a larger view) 

This week's prairie plant features the Compass Plant; this plant is fairly iconic on the tallgrass prairie - a large plant, usually towering above me as I walk through the mid to late summer prairie.  The birds love their seeds and this plant provides a solid platform for many bird nests as well.

I first spread seed for this plant in our first year here at the acreage and five years later we had flowering stalks 5-8 feet high!  It was well worth the wait I'd say, but I'd recommend only seeding for 2-3 years (maybe less) and then wait for the plants to establish, otherwise you'll have stands too thick to navigate!

Siphium laciniatum (Compass Plant)

photograph - © Bruce A. Morrison

(click on image for a larger view)

 

The leaves on Compass Plants are very distinct and quite large and handsome.  The plant gets it's common name from the leaves tending to orient themselves in a general north-south direction...they are very large, a foot or more in length and half a foot or more wide...very thick and substantial to say the least!

The yellow flowers are 3-4 inches wide and are alternate up the plant's heavy/thick stem.  They attract a great variety of pollinators too!

The Compass Plant's leaves and roots was used by several first nation tribes for many different uses...in the book "Wildflowers of the Tallgrass Prairie" by Roosa and Runkel, it is even mentioned that burning a dried root during a lightning storm acted as a charm to ward off lightning strikes...or hopefully so!
It was also said that when in bloom, a gummy material forms along the upper 3rd of the main stem.  This resinous material was used by Native Americans as a chewing gum.

Siphium laciniatum (Compass Plant)

photograph - © Bruce A. Morrison

(click on image for a larger view)

 

This is one plant that deer really seem to like in the early summer stage of growth but avoid later on when it gains height...I don't know how good of a forage it may have been to pioneers first settling the prairies but the Roosa/Runkel book says it was liked by cattle as well; likely being a reason it was pretty much eliminated wherever cattle were grazed year after year...I personally have found that cattle are very hard on native forbs, many will not sustain heavy grazing pressure like that year after year.

Next time you're out on the prairie, walk up next to a Compass plant and see how it measures up!  They're pretty cool in my book!