Bitterroot Mountains

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Lupinus argenteus var. argenteus “Silvery Lupine” Fabaceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

Our two most common Lupines in the Missoula area are the Silvery and Silky Lupines (L. argenteus and L. sericeus, respectively). You can easily tell them apart by the upper petals on their flowers (called the “banner” in papilionaceous pea flowers). In the Silvery Lupine (pictured here), the backside of the banner has no hairs, while the Silky Lupine has a dense coating of hair on its banners. In our area, Silvery Lupines that grow in the dry soils of Ponderosa Pinelands and have folded leaflets are of the var. argenteus.

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Viola adunca “Hookedspur Violet” Violaceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

The Hookedspur Violet is an abundant, easily recognized flower found throughout the Northwest. In our area it is readily distinguished from other purple-flowered violets by its long spur (not shown here) and its lance-ovate or near-cordate-ovate leaves. 

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Ribes lacustre “Spiny Swamp Currant” Grossulariaceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

East of the Cascades, the Spiny Swamp Currant is the most common member of Ribes in shady, wet areas of dense coniferous forests. Their berries, like most Ribes are edible but quite unpalatable. 

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Arnica cordifolia “Heart-leaf Arnica” Asteraceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

These lovely flowers are literally blanketing the otherwise barren burn areas of the Lolo National Forest this year!

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Misumena vatia “Goldenrod Crab Spider” Thomisidae on
Cymopterus glaucus “Waxy Spring Parsley” Apiaceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

Goldenrod Crab Spiders are inordinately abundant in spring blooms all around the PNW. They can be differentiated from their cousins in the genus Misumenoides by the lack of a faint white ridge on their face between their lower eyes and their jaws. But far more interesting than this lurking ambush predator is the fact that this image of Cymopterus glaucus is the first to grace the internet. And all because I thought I was taking a picture of a cool spider. You can see more photos of this plant below. C. glaucus is endemic to Idaho and western Montana where it is locally common on sandy or gravely slopes in dry Ponderosa Pinelands. I’m so confounded by the lack of images of this plant online that I’ll be checking out the UM herbarium later to verify that this is indeed C. glaucus. Any suggestions to the contrary would be much appreciated.

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Equisetum arvense “Common Horsetail” Equisetaceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

Horsetails were once abundant, diverse organisms, but today all surviving members of this ancient clade are restricted to a single genus with a worldwide distribution. This particular stalk is a fertile, strobilus-bearing stem. Their infertile counterparts look almost nothing alike!

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Castilleja hispida “Harsh Paintbrush” Orobanchaceae

Lolo National Forest, Bitterroot Mountains, MT
May 10, 2015
Robert Niese

There are three or four species of paintbrushes with red bracts in the Pacific Northwest. The two most common are the Harsh Paintbrush (C. hispida) and the Common Crimson Paintbrush (C. miniata). C. hispida has a dense coat of long, hispid hairs (which look lovely when back-lit!) and will always have lobed leaves on the upper third of their stems. Conversely C. miniata is often less hairy and will have unlobed leaves on the entire stem (sometimes with small lobes on the upper-most portion). The two can also be differentiated by their calyces which are pointed in C. miniata and blunt in C. hispida.
Fun Fact: All paintbrush species are parasites, growing on the roots of other plants to survive.

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Dodecatheon conjugens “Desert Shooting Star” Primulaceae

Lolo National Forest, Bitterroot Mountains, MT
March 18, 2015
Robert Niese

Our two most common Shooting Stars in the Missoula area are D. conjugens and D. pulchellum. They are nearly identical and can even occur side-by-side on shrub-steppe hillsides, but a careful examination of the wrinkles at the base of the anthers and the shape of the stigma can usually assist in identification. D. pulchellum tends to have a slightly enlarged stigma and has anthers with wrinkles that run vertically. Conversely, D. conjugens has a narrow, almost imperceptible stigma and has wrinkles on its anthers that run horizontally. This individual has some nice horizontal wrinkles and a very small stigma. After editing this picture, I noticed that there is also a louse or springtail hanging out on the style, presumably waiting for a pollinator to stop by so it can hitch a ride to another flower.

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Geopyxis carbonaria “Goblet Fungus” Ascomycota

Lolo National Forest, Bitterroot Mountains, MT
March 18, 2015
Robert Niese

These adorable cup fungi are inordinately abundant in areas following fires. We counted more than a hundred in a single square meter on a hillside that had burned in 2013.

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Trillium ovatum “Wakerobin/Western Trillium” Liliaceae

Lolo National Forest, Bitterroot Mountains, MT
March 18, 2015
Robert Niese

Trillium is, by far and away, my favorite spring arrival to our PNW forests. They like moist areas around rivers and streams, especially those that have a nice mossy carpet to keep the soil damp throughout the year.