Louis Forniquet Henderson

Iris innominata, the Del Norte County iris, is a species of iris native to southern Oregon, and California along the north coast and Klamath Ranges in Del Norte County, California. The leaves are dense and evergreen, up to 20 cm. The flower is typically deep golden yellow with darker veins, although colors may vary. The flower stems are about 12 cm and usually bear 1–2 flowers in spring. It is on the California Native Plant Society Inventory of Rare and Endangered Plants of California List 4, Limited distribution (Watch List).

Allium simillimum, the simil onion, or dwarf onion, is a plant species native to Idaho and Montana (Gallatin and Ravalli Counties). It grows on sandy soils at high elevations in the mountains, 1800–3400 m. Allium simillimum produces egg-shaped bulbs up to 1.7 cm long. Flowering stalks are rarely more than 5 cm tall. Flowers are bell-shaped, up to 10 mm across; tepals white with green or pink midribs; anthers purple; pollen white or gray.

Allium robinsonii, the Columbia River onion or Robinson's onion, is a rare plant species native to the US States of Washington and Oregon, although some studies suggest that the Oregon populations may now be extinct. The species has been reported from five counties in Washington (Ferry, Yakima, Grant, Franklin and Benton) and five in Oregon (Umatilla, Morrow, Gilliam, Sherman and Wasco). It is found in sand and gravel deposits along the lower Columbia River and some of its tributaries, usually at elevations less than 200 m. The species is also cultivated as an ornamental in other regions,

Allium punctum is a species of wild onion known by the common name dotted onion or Modoc onion. It is native to the western United States in and around the Modoc Plateau in northeastern California (Modoc County), northwestern Nevada (Humboldt County), and southeastern Oregon (Malheur, Lake and Harney Counties). It is uncommon, growing in volcanic flatlands created by old lava flows.

Isoetes occidentalis, the western quillwort, is a species of quillwort in the family Isoetaceae. It can be found in aquatic habitats of coastal Alaska and British Columbia south to California and Colorado. It is frequently found on Vancouver Island and around the Fraser Valley region. It bears 10 to 30 or more rigid, dark green leaves, each 5 to 20 centimeters long. The velum covers one fourth to one third of the orbicular sporangium, which is 5 to 6 millimeters in diameter. The ligule is shaped like a shortened triangle. The white megaspores are 500 to 700 micrometers in diameter and bear

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Primula poetica, synonym Dodecatheon poeticum, is commonly known as the poet's shooting star or the narcissus shooting star. P. poetica is a species of the genus Primula placed in section Dodecatheon. It is native to the states of Oregon and Washington in western North America. The section contains herbaceous flowering plants and is also a part of the primrose family Primulaceae. This plant has basal clumps of leaves and drooping flowers that occur at the apex of tall stems that rise from where the leaves join.

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Cirsium peckii, the Steens Mountain thistle, is a very spiny and prickly perennial plant in the family Asteraceae that grows in the Great Basin of the western United States.

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Kalmiopsis leachiana, commonly referred to as Siskiyou kalmiopsis, is a rare flowering plant endemic to the Siskiyou Mountains of southwest Oregon, where it is specially protected in the 179,755-acre (727.4 km2) Kalmiopsis Wilderness reserve. It was discovered in 1930 by Lilla Leach in the Gold Basin area. It is related to Kalmia in the family Ericaceae.

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Cirsium ciliolatum is a species of thistle known by the common name Ashland thistle. It is endemic to the Klamath Mountains, where it is known from only a few occurrences in Jackson and Josephine Counties in Oregon, as well as neighboring Humboldt and Siskiyou Counties in California. It is related to Cirsium undulatum and may be more accurately described as a variety of that species. Cirsium ciliolatum is a perennial herb growing from a rootstock branching with runner roots to a maximum height near 200 cm (79 in). It is cobwebby with fibers. The gray-green woolly leaves are smooth along the

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Lupinus latifolius var. barbatus, the Klamath lupine, sometimes also called bearded lupine, is a very rare plant of the Western U.S., known only from northeastern California and southeastern Oregon. It is a rare variety of the generally common species L. latifolius, which is a member of the bean family.

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