Mountain Plants of the Western Cascades

Posts Tagged ‘caterpillars’

There’s quite a contrast between the Boisduval’s blue caterpillars almost motionlessly eating lupine pods and the frenetic activity of the ants running up and down stems and back and forth across the caterpillars. Most of the caterpillars we found were tended by these large red-and-black ants.

After the wonderful trip to the rock garden on the way to Spring Prairie in July (see Beautiful Spots on the Road to Spring Prairie), I was anxious to return to the area and check out the other spot I hadn’t been to in many years. Spring Meadow is a wetland in the drainage of Mule Creek between the rock garden and Spring Prairie. On August 3rd, Sheila Klest and I headed up Road 733. We saw lots of butterflies along the road, including quite a few at a patch of spreading dogbane (Apocynum androsaemifolium) I hadn’t known about. I definitely wanted to check it out but decided we should drive all the way to Spring Prairie first and work our way back slowly.

A few of the caterpillars had smaller ants. Although the caterpillars ranged from green to this paler pinkish color, they all had a reddish purple stripe down their back.

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A rufous hummingbird nectaring on Cooley’s hedgenettle

An Anna’s blue on a fading lupine. I’ll have to come back when they are in bloom to try to ID the lupines.

On July 25, Nancy Bray and her husband, Herb, invited my husband Jim and me to join them on a trip to Blair Lake and nearby Spring Prairie. It was a bit hazy from fires to the south but otherwise a lovely day. When we got to the intersection of Road 733 that goes up to Spring Prairie, we made a quick decision to go up there first. I was pleased to see the road was in better shape than I remembered (no more trench down the middle of one section) as it had been quite some time since I’d driven up there although I had walked up the trail from Blair Lake last year (see Beargrass Season at Blair Lake).

We drove straight up to the edge of Spring Prairie and parked the car. On getting out, I immediately noticed lots of butterflies flying about in the large, mostly beargrass (Xerophyllum tenax) meadow. Other than some fireweed (Chamerion angustifolium) blooming farther downhill, nothing was in flower. So what were all these butterflies doing here? Growing among the beargrass was quite a bit of lupine (Lupinus sp.) with immature fruits. The butterflies all seemed to be Anna’s blues (Plebejus anna). If you guessed that they use lupines and other legumes as host plants, you’d be right. They appeared to be mating and laying eggs. I started searching the plants carefully. It took only a few minutes to spot the first egg, looking much like a tiny white sea urchin shell after the spines fall off. I’d never seen one before, but I recognized it from the similar hedgerow hairstreak eggs I’d seen a couple of years ago. What a great start to the day! I continued to look for eggs and found quite a few more, laid on stems and pods as well as leaves. Read the rest of this entry »

Gentians blooming in the main bog.

Alpine laurel (Kalmia microphylla) is already in seed by the time the flowers of the late-blooming gentians appear.

Having just discovered explorer’s gentians (Gentiana calycosa) on Warner Mountain (see previous post, Hidden Bog on Warner Mountain), my top priority was to get back to see them in full bloom. I contacted Molly Juillerat, botanist and Middle Fork District ranger, to see if she wanted to come. Luckily, she was free the following weekend. I figured that was enough time for the display to be worth the trip. As it turns out, a couple of other friends, Nancy and Keiko, were already planning to head up to that area as well. So we agreed to all drive up separately and meet by the lookout on August 2. Keiko brought her husband, Daniel, and Molly brought her faithful dog, Ruby. After checking out an interesting rocky spot a short way off the road that I’d noticed on Google Earth (not too many flowers but pikas under the rock pile!), we stopped to have lunch by the lookout. Sadly, the Cascade lilies were pretty much done—I was really fortunate to have seen them the week before. Then we headed over to the bog. Read the rest of this entry »

On June 27, John Koenig and I went to Grassy Glade with Jenny Lippert, Willamette National Forest botanist, to see if there was any more monarch activity. Jenny hadn’t been there for a number of years, so I was quite interested to find out if she thought the population of purple milkweed (Asclepias cordifolia) was expanding or contracting. We’ve had a number of discussions about whether this species is moving northward—possibly due to climate change—or if it was formerly more common back when Native Americans kept the area more open by burning and is now decreasing. The answer to this question would be of great help in deciding how best to encourage more milkweed in the Rigdon area. She seemed certain there was more milkweed in the main area by the road and that she hadn’t seen it before closer to the large, open meadow. While anecdotal, this was great to hear.

John walking along Rabbitbrush Ridge. Mosaic Rock and Steeple Rock can be seen in the distance. The light gray-green foliage is rubber rabbitbrush (Ericameria nauseosa).

We found a few eggs but not as many as I was hoping to see. As on my previous trip, a swallowtail and some smaller butterflies were enjoying the lovely milkweed blossoms. Soon, we were joined by a monarch! It was a male, and I wondered if it was the same one I had spotted a couple of weeks before. Where was the female who had laid the eggs? Read the rest of this entry »

Looking north from “Sundew Road”, you can see haze from smoke, but at least there was some view! Goldenrod (Solidago sp.) was blooming abundantly along the old road.

Painted ladies were abundant everywhere we went. Note the 4 or 5 circular marks along the edge of the hindwing.

The area by Groundhog Mountain has been one of my favorites for many years. What with the roads deteriorating, the oppressive heat, and the awful smoke from so many wildfires, I was afraid I wouldn’t get there this year. But on August 11, John Koenig and I took advantage of a relatively pleasant day in an otherwise nasty month and had a wonderful day up at Groundhog. There were still plenty of late-season flowers and a surprising amount of moisture after 2 months of drought. We really enjoyed it and so did the many butterflies and other insects. We spent a long day exploring Waterdog Lake, many of the wetlands, including the shallow lakes up Road 452, and what I like to call “Sundew Road”—what’s left of Road 454 on the north side of the mountain. We saw so many butterflies, moths, caterpillars, bees, dragonflies, as well as hummingbirds, frogs, and toads—too much to show it all, but here are a few highlights from our day. Read the rest of this entry »