Idaho Mountain Wildflowers
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We encounter unusual plants from time to time. Here are several (thanks to Mike Mancuso for showing us the  first four plants ) along with various miscellaneous plants.

English sundew, Drosera anglica Huds. (left) The English sundew is a circumboreal plant that ranges across northern North America and Eurasia.. Unlike other sundews, ours is a tiny plant whose leaves measure no more than a quarter of an inch in length. They are covered with small projecting stalks that exude a clear sticky substance that ensnares insects--this is a carniverous plant. It has a small white flower (not present in this image) Sundews are wetlands plant.

Bog St. John's-wort, Hypericum anagalloides  Cham. & Schlect. (right)This tiny bog plant, formerly classified in family Hypercaceae and now in the Clusiaceae family. It is a native plant unlike the far larger, common St. John's-wort, a major pest, considered a noxious plant in many states. Ours stands only an inch or so tall and is identified by its boggy environment and by its yellow flower which closely resembles that of the common St. John's-wort, although far smaller.

Both of these plants were photographed in Central Idaho's Bull Trout Bog..

Dimeresia, Dimeresia howellii Gray. (left) The dimeresia grows in small scattered clumps on the dry rocky soil of foothills and low mountains. Few would guess that the dimeresia is in the aster, or composite, family. Although difficult to see without magnification, its flowers--barely 1/4" across--consist of an involucre made up of spreading white bracts which  contain a tiny apetalous discoid flowerhead made up of several tiny florets.  It is found on the Owyhee highlands in Idaho, and adjacent Oregon, into northern Nevada and northern California. This is the only species in its genus.

Desert prince's plume, Stanleya pinnata (Pursh) Britton (right). As the common name suggests, the prince's plume grows on dry ground. It is found in western states from southern Oregon and California, east to the Dakotas, Nebraska, Kansas and Texas. It is tall and attractive so it is sometimes used in xeric situations as an ornamental. The leaves are said to be edible, and if sampled will be found to have a pronounced "cabbage-y" taste. The stanleya (named for Lord Edward Stanley, a British ornithologist) is in the mustard family (Brassicaceae).

Porterella, Porterella carnulosa (Hook & Arn.) Torr. is another semi-aquatic plant that grows on mud, in marshes, or on the edge of ponds. It is in the bell-flower family and is quite similar in appearance to two other genera, Downingia and Lobelia, that also grow in Idaho. These plants have upside-down (("resupinate") flowers because--as with some of  our orchids--the upper lip (three parted in this plant) is twisted to become the lower lip.

Broad leaf cattail, Typha latifolia L. is in the small It is a ubiquitous, useful, water plant that spreads by seed and by extensive rhizomes. It is found in all of the American states and Canadian provinces. The plants effectively remove contaminnts from slow-flowing water, serve as shelter for water and other birds, and its rhizomes and fruiting parts were used as food by native Americans. The upper pollen-bearing "flowers" merge with the lower brown pistillate flowers on a tall pithy stem. A fruiting plant is shown behind. A similar imported plant, Typha angustifolia, is also common but less widely distributed. It may be distinguished from the broad leaf species because the staminate and pistillate segments are separated on the stem.

Arctic willow, Salix arctica Pallas. Although it may grow above treeline in other places in Idaho, we have only seen the arctic willow high in the Hyndman Basin in Central Idaho's Pioneer Range. This alpine  plant is prostrate lying on the tundra on which it grows. Protruding ripe catkins are surrounded by cotton like accumulations of filaments and their attached seeds, forming small windrows.

Puncture vine, or Mexican sandbur, Tribulus terrestris L. (left) is a nasty piece of work. While its leaves look like those in the pea family, its 5-petaled flowers do not; it is , in fact, in the creosote bush family, Zygophyllaceae. The spines on its fruiting body are as rigid as a thumb-tack and really can cause punctures in thin walled-tires, especially those of bicycles. The plants are found in every state, and are considered --understandably--to be noxious weeds in many. Puncture vines do not, so far as we know, grow at higher elevations. It's generic name, Tribulus, is the Latin word for "caltrop," the three sided defensive device scattered on the ground in ancient times to slow attacking men and their horses.

Western (or yellow) skunk cabbage, Lysichiton americanus Hulten & St. John is, like the eastern skunk cabbage, a striking and somewhat similar plant. It lacks the strong, skunk-like aroma of the eastern plant. Both are members of the Araceae familyalthough in  different genera. The western skunk cabbage grows in the Pacific coastal states where it is common in boggy areas. It is encountered less commonly further inland as far east  as the Idaho panhandle. It is certainly one of our more striking and attractive spring plants.

Willow-leaf lettuce, Lactuca saligna L. (left, right) is not listed by the USDA as being present in Idaho (although it  is found  in nearby states). It is very much here, however, growing along the Boise river and on nearby ground. The plants release vast numbers of seeds in late summer (right), each borne aloft on their parachute like pappus, efficiently spreading the weedy plant far and wide. Unlike the related weed, Lactuca serriola  (both are European imports), the willow-leaf lettuce has not yet found its way into our mountains.

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