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Grasses at a Glance

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indiangrass inflorescence

Identifying warm-season grasses: Indiangrass

While driving from one end of Illinois to the other and back this past week, I enjoyed seeing the abundance of Indiangrass carpeting the median strips. The blue-green foliage is topped with golden-orange panicles of smooth, soft spikelets. Indiangrass (Sorghastrum nutans) is one of my...
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closeup of the inflorescence of purpletop

Grasses can be purple?

While driving to work today, I scanned the sides of the road to see what grasses are in bloom. I was happy to see large patches of a grass with purple inflorescences. These dark purple grass spikelets belong to Purpletop (Tridens flavus). Ah, a common name that accurately describes...
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clump of Canada wild rye in bloom

Breaking down the rye grasses

I’m sure many of us have been hiking in the woods and been able to make general plant identifications – I know that’s a maple over there, here’s an oak, that’s definitely a hickory. But what about taking the next step to find out which type of maple, oak, or hickory? Getting an identification down...
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Golden spikelets of River Oats growing in full sun

Identifying River Oats

Today while visiting one of the food donation gardens I manage, I stopped by our sensory garden to see what was blooming. Finding plants for a sound garden is challenging, but we added in some native grasses, as they create a pleasant rustling sound when a breeze flows through the leaves. The grass...
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patch of giant foxtail, with drooping inflorescences

Comparing the foxtails

As we reach mid-July, the foxtail grasses have started to flower. Named for the appearance of their spike inflorescences, these grasses are easy to pick out from the crowd. There are six species of foxtails in Illinois, but three of them are very common, found in every county in Illinois. All...
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close up of the spikelets of side oats grama grass, looking like little red eyelashes

Identifying the Grama Grasses

One of my favorite grasses started blooming during this past week – Side Oats Grama. I planted some in my garden last fall and am thrilled to see it blooming. Side Oats Grama is one of four grama grasses that can be found in Illinois, and by far the most common. The other three look much more like...
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grassy edge with gama grass in bloom

What’s growing? A look at Gama Grass

I spent a lot of time exploring restored grasslands during grad school while collecting data for my research. I had become familiar with the most common grasses in the area, but one day I ran across something that didn't look super familiar. I didn’t know what to think at first, because it looked...
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broomsedge grass in bloom, little bluestem grass in bloom, and big bluestem grass in bloom

Comparing common and scientific plant names

When you are at the plant nursery, have you ever noticed that plants often have two names listed on the tag? One is a common name, such as Switchgrass. The other is the scientific name, in Latin, Panicum virgatum. Why the two names? Is just knowing the common name okay? Time for a quiz...
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field of little barley, a green grass

Understanding cool-season and warm-season grasses

With warmer weather and spring rains, grasses have begun to grow. Looking around my yard, my lawn grasses are rapidly greening up, some even flowering between our routine mowing. Other grasses in my landscaping are just starting to put out new leafy growth. Why the difference in growth rates? Cool...
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raceme inflorescence of gama grass

Looking closer at grass flowers

When I hike in the woods during the spring, I’m always excited to see my favorite spring ephemerals in bloom. I can recognize Celandine Poppy by the sunshine yellow flowers with four petals, Yellow Trout Lily by the recurved, yellow petals forming an upside-down cup, and Pawpaw by the...
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