Iowa wildflower Wednesday: Yellow star grass (Common goldstar)

Today’s featured plant was a new addition to my “life list” during a recent visit to Tipton Prairie in Greene County. Yellow star grass (Hypoxis hirsuta), sometimes known as common goldstar, is native to most of North America east of the Rocky Mountains. I’d seen pictures of the small yellow flowers in books and on the Iowa Wildflower Report Facebook group, but I don’t think I had ever seen one in person until one of my companions called me over to a slope near the highest point of the four-acre prairie.

According to the website of the Lady Bird Johnson Wildflower Center at the University of Texas, “This small plant can easily be confused with a grass unless its distinctive flower is seen.”

 photo yellowstargrass3_zpsuvhmkgup.jpg

The Minnesota Wildflowers site notes,

Yellow Star-grass is easily overlooked until you have discovered them once, then they become an anticipated sign of spring. They can do well in a sunny dry garden spot but do not compete well with larger plants if that is what you must have. Makes for a delightful specimen in some protected garden corner where more aggressive species are kept at bay.

 photo yellowstargrass1_zpsj7rguits.jpg

The Illinois Wildflowers says of this plant,

Habitats include prairies, hill prairies, edges of bluffs, savannas, open woodlands and paths through woodlands, fens, sandstone glades, abandoned fields, and lawns. […]

This dainty wildflower is like a miniature jewel when it is in bloom. It is rarely more than 6″ in height. No other native wildflower within the state closely resembles it, making identification relatively easy.

I believe the foliage near the top of the frame, with smaller leaves, is lead plant. (CORRECTION: Bleeding Heartland reader PrairieFan thinks it is bastard toadflax. There was a lot of that on this prairie.) Above and below the yellow star grass, you can see basal leaves of alumroot.

yellow star grass 3 photo yellowstargrassclose_zpsdejqnokb.jpg

Another yellow star grass flower, growing near the distinctive basal leaves of alumroot.

 photo yellowstargrasshiding_zpsza2mi1qx.jpg

Because yellow star grass is unobtrusive, I wanted to capture some pictures of it hiding among other prairie grasses and flowers.

yellow star grass 7 photo yellowstargrasshiding2_zpsni0o7cmh.jpg

yellow star grass 6 photo yellowstargrasshiding6_zpsrkxwmqse.jpg

 photo yellowstargrasshiding4_zpsi9afanqu.jpg

 photo yellowstargrasshiding5_zps7a27m0ll.jpg

 photo yellowstargrasshiding3_zpsnvce86hq.jpg

Prairie phlox steals the show.

 photo yellowstargrassprairiephlox_zpsrawklpkh.jpg

Even though the prairie phlox flowers are just starting to open, they are more showy than the yellow star grass flower.
 photo yellowstargrassprairiephlox2_zpsos7ginew.jpg

You can see Golden Alexanders flowers from a long way off on the prairie, but I didn’t notice the yellow star grass until I was almost right on top of it.

 photo yellowstargrassGoldenAlexanders_zpskzvngifu.jpg

Tags: Wildflowers
  • One of my favorites

    I love yellow stargrass and it’s great to see several nice photos of it here. Thank you! I wish it were more common in Iowa. I’ve seen it in very few plantings.

    I think the foliage identified as leadplant in one photo above is a different species. My best guess is bastard toadflax, Comandra umbellata. That’s another small beautiful spring bloomer that is seldom found in plantings.

  • Thanks!

    I look forward to seeing bastard toadflax photos. It’s a wonderful plant.

    To clarify my earlier comment, we aren’t able to create prairie plantings as diverse and complex as Tipton Prairie. But we could have far better planted prairies with more diverse and interesting flowers and grasses if we protected fragile farmland with permanent high-quality prairie plantings instead of temporary mediocre CRP plantings.

You need to signin or signup to post a comment.