Common Cryptantha, Quill Cat's-eye, Quill Cryptantha, Slender Cryptantha: Cryptantha affinis (Synonym: Krynitzkia affinis) -
Basin Cat's Eye, Basin Cryptantha, Obscure Cryptantha, Wilke's Cryptantha: Cryptantha ambigua - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corollas small, the limbs 0.5-2.5 mm wide. Calyx hairs more or less straight. Nutlets rough-surfaced, not winged. Herbage of plants with at least some spreading hairs.
Flaccid Cryptantha, Weakstem Cryptantha, Weakstem Cat's Eye, Weak-stem Cryptantha, Weak-stemmed Cryptantha: Cryptantha flaccida (Synonyms: Cryptantha rostellata, Cryptantha rostellata var. spithamea) - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corollas small, the limbs 0.5-2.5 mm wide. Calyx with arched or hooked hairs. Nutlets single, smooth, pointed or very narrowly flattened at the base.
Clearwater Cryptantha, Large-flowered Cryptantha: Cryptantha grandiflora (Synonym: Cryptantha intermedia var. grandiflora) - Similar to C. intermedia var. hendersonii, it has consistently smooth nutlets of which there are only one or two per fruit.
Henderson's Common Cryptantha, Palouse Cryptantha: Cryptantha intermedia var. hendersonii (Synonym: Cryptantha hendersonii) -
Clearwater Cryptantha, Clearwater Cat's Eye, Common Cryptantha, Large-flowered Cryptantha: Cryptantha intermedia var. intermedia (Synonyms: Cryptantha barbigera var. fergusoniae, Cryptantha fragilis, Cryptantha grandiflora, Cryptantha hendersonii, Cryptantha intermedia var. grandiflora, Cryptantha intermedia var. intermedia) - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corolla fairly large, the limb 4-8 mm wide. Very similar to C. grandiflora, there are one or two nutlets which are each densely papillate and scattered low-tuberculate.
Winged Cryptantha, Wingnut Cryptantha, Wing-nut Cryptantha: Cryptantha pterocarya var. pterocarya (Synonym: Cryptantha pterocarya) - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corollas small, the limbs 0.5-2.5 mm wide. Calyx hairs more or less straight. Nutlets roughened with noticeable, borad winged margins.
Beaked Cryptantha, Red-stemmed Cryptantha: Cryptantha rostellata (Synonyms: Cryptantha flaccida, Cryptantha rostellata var. spithamea) - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corollas small, the limbs 0.5-2.5 mm wide. Calyx with arched or hooked hairs. Nutlets single, smooth, broadly flattened at the base. The style is equal to or slightly longer than half the length of the nutlet.
Pinewoods Cryptantha, Pine Woods Cryptantha: Cryptantha simulans - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corollas small, the limbs 0.5-2.5 mm wide. Calyx hairs more or less straight. Nutlets rough-surfaced, but not winged. Herbage of plants with closely appressed hairs (No spreading hairs present.).
Torrey's Cat's Eye, Torrey's Cryptantha: Cryptantha torreyana (Synonyms: Cryptantha calycosa, Cryptantha eastwoodiae, Cryptantha flexulosa, Cryptantha torreyana var. calycosa, Cryptantha torreyana var. pumila, Cryptantha torreyana var. torreyana) - Annual. Slender plants lacking a tuft of basal leaves. Inflorescence open and scorpioid. Corollas small, the limbs 0.5-2.5 mm wide. Calyx hairs more or less straight. 4 nutlets present, smooth surfaced. Style less than the nutlets.
Watson's Catseye, Watson's Cryptantha: Cryptantha watsonii -
Buttecandle, Cockscomb Cryptantha, Northern Cryptantha, Sheldon's Oreocarya: Oreocarya glomerata (Synonyms: Cryptantha bradburiana, Cryptantha celosioides, Cryptantha macounii, Cryptantha nubigena var. macounii, Cryptantha sheldonii, Oreocarya celosioides, Oreocarya macounii, Oreocarya sheldonii) - Perennial. Plants generally with a tuft of broad, oblanceolate or spatulate basal leaves from 2-8 cm long and 4-15 mm wide. Inflorescence a dense spike of showy flowers, the corolla limbs generally 8-12 mm wide.
Bristly Oreocarya: Oreocarya interrupta (Synonym: Cryptantha interrupta) -
Gray Cat's Eye, Gray Cryptantha, Gray Oreocarya: Oreocarya leucophaea (Synonym: Cryptantha leucophaea) - This rare species may be extirpated in the Columbia River Gorge. There are several collections from the eastern Gorge from the 1880s, but the pools behind several of the dams may have covered these sites. This is a species that should be looked for at all remaining sites with sand dunes.
Elko Cryptanth, Narrow-leaved Cryptantha, Snake River Catseye, Snake River Cat's Eye, Snake River Cryptantha: Oreocarya spiculifera (Synonyms: Cryptantha interrupta, Cryptantha spiculifera) -