Amaranthus watsonii is a species of amaranth known by the common name Watson's amaranth. It is native to the southwestern United States and northern Mexico, where it grows in sandy places such as deserts and beaches, and disturbed areas. It is also known as a rare introduced species in parts of Europe. This is an erect annual herb producing a glandular hairy stem to a maximum height of about a meter. The leaves are generally oval-shaped and up to 8 centimeters long, with a petiole of up to 9 centimeters. The species is dioecious, with male and female individuals producing different types of flowers. The inflorescence is a long spike cluster of flowers interspersed with spiny green glandular bracts. The fruit is a smooth capsule about 2 millimeters long that snaps in half to reveal a small shiny reddish black seed.
Arabis aculeolata is a species of flowering plant in the mustard family known by the common name Waldo rockcress.
Boechera stricta is a species of flowering plant in the mustard family known by the common name Drummond's rockcress. It is native to much of North America, including most of Canada, and the western and northeastern United States.
Arabis lemmonii is a species of flowering plant in the family Brassicaceae known by the common name Lemmon's rockcress. It is native to western North America from Alaska to California to Colorado, where it grows in a number of rocky habitat types.
Astragalus agrestis is a species of milkvetch known by the common names purple milkvetch, purple loco, and field milkvetch. It is native to much of western and northern North America from most of Canada to the southwestern United States, as well as eastern Asia. It grows in vernally moist areas such as meadows, and is often found in sagebrush.
Boechera breweri is a species of flowering plant in the family Brassicaceae known by the common name Brewer's rockcress.
Boechera constancei is a species of flowering plant in the mustard family known by the common name Constance's rockcress. It is endemic to California, where it is known only from the northern Sierra Nevada of Plumas and Sierra Counties. It is a member of the serpentine soils flora. This is a perennial herb growing from a branching, woody caudex. It produces one or more erect, hairless stems to maximum heights between 15 and 30 centimeters. The caudex is surrounded by a dense basal rosette of stiff, blue-green, lance-shaped leaves up to 3 centimeters long. There may be a few smaller leaves along the stem. The inflorescence produces 5 to 10 white mustardlike flowers with protruding stamens. The fruit is a hanging green silique 4 or 5 centimeters long which contains round, winged seeds.
Boechera dispar is a species of flowering plant in the family Brassicaceae known by the common name pinyon rockcress. It is native to eastern California and western Nevada, where it grows in rocky areas in desert and mountain habitat. This is a perennial herb growing from a branching caudex. It produces several erect stems reaching 10 to 25 centimeters tall. The leaves are mostly located about the caudex. They are linear to lance-shaped, coated in white hairs, and one or two centimeters long. The flowers have purple petals. The fruit is a long, narrow, hairless silique up to 7 centimeters long containing round, winged seeds.
Pedicularis centranthera is a species of flowering plant in the family Orobanchaceae known by the common names dwarf lousewort and Great Basin lousewort. It is native to the western United States from eastern Oregon and California to Colorado and New Mexico, where it grows in sagebrush and other basin and plateau habitat. It is a perennial herb producing several short stems a few centimeters tall from a basal caudex. The leaves are up to 20 centimeters long, lance-shaped and divided into many overlapping toothed, wrinkled, or fringed lobes. The inflorescence is a short raceme bearing many long, protruding, club-shaped flowers. Each flower may exceed 4 centimeters in length and is white or pale purple with dark purple tips on the wide ends of its upper and lower lips. The sepals of the flowers are shorter and hairy. The fruit is a capsule around centimeter long containing seeds with netlike surfaces.
Pedicularis howellii is an uncommon species of flowering plant in the family Orobanchaceae known by the common name Howell's lousewort. It is endemic to the Siskiyou Mountains of the Klamath Range in southern Oregon and northern California, where it grows on the edges of coniferous forests. This is a perennial herb producing one or more stems up to 45 centimetres (18 in) tall from a long caudex. The leaves are up to 20 centimetres (8 in) long, lance-shaped, and divided into many toothed oval lobes; those higher on the stem may be unlobed. The basal leaves fall away early. The inflorescence is a small raceme of flowers occupying the top of the stem. Each white to light purple flower is up to one centimetre long and is sickle-shaped, with a curved beak-like upper lip and a three-lobed lower lip which may be tucked into the hairy mass of sepals. The plant is pollinated by bumblebees including Bombus mixtus. Between the flowers are hairy to woolly triangular bracts. The fruit is a capsule just under a centimeter long containing seeds with netted surfaces.
Packera bernardina is a rare species of flowering plant in the aster family known by the common name San Bernardino ragwort.
Senecio hydrophilus is a species of flowering plant in the aster family known by the common names water ragwort and alkali-marsh ragwort. It is native to western North America from British Columbia to California to Colorado, where it grows in swampy places such as marshes. It can grow in standing water, including alkaline and salty water. It is a biennial or perennial herb producing a single erect stem or a cluster of a few stems which may exceed one meter in maximum height, at times approaching two meters. The stem is hollow, waxy in texture, and often pale green in color, and it emerges from a small caudex. The thick leaves are lance-shaped to oval with smooth or toothed edges, the blades up to 20 centimeters long and borne on petioles. Smaller leaves occur farther up the stem. The inflorescence is one or more large, spreading clusters of many flower heads. They contain many yellowish disc florets at the center and sometimes have small yellow ray florets as well.
Silene bernardina is a species of flowering plant in the family Caryophyllaceae known by the common name Palmer's catchfly.
Silene grayi is a species of flowering plant in the family Caryophyllaceae known by the common name Gray's catchfly. It is native to the mountains of Oregon and northern California, including the Klamath Mountains, where it grows in chaparral, mountain forests, and the talus of high slopes in alpine climates. It has been observed to occur in a plant association with oceanspray, littleleaf silverback, and Gray's bedstraw. It is a perennial herb producing a decumbent or erect stem up to 20 or 30 centimeters long from a woody, branching caudex. The base of the plant is covered in tufts of leaves. These basal leaves are lance-shaped to nearly spoon-shaped, fleshy, and up to 4 centimeters long. Smaller, narrower leaves occur farther up the stems. Each flower has a tubular calyx of fused sepals lined with ten green or red veins and covered in glandular hairs. It is open at the tip, revealing five pink or purple petals. The petal tips and appendages are divided into narrow lobes.
Silene hookeri is a species of flowering plant in the family Caryophyllaceae known by the common names Hooker's silene, Hooker's catchfly, Hooker's Indian pink, and Hooker's glandular campion.
Silene oregana is a species of flowering plant in the family Caryophyllaceae known by the common names Oregon silene, Oregon campion and Oregon catchfly. It is native to the western United States, including the Great Basin, where it grows in habitat such as sagebrush and forests. It is a perennial herb growing from a woody caudex and taproot, sending up an erect, mostly unbranched stem which may be 70 centimeters tall. The lance-shaped leaves are up to 8 centimeters long around the caudex, and shorter farther up the stem. Flowers occur in a terminal cyme and sometimes in leaf axils. Each flower is encapsulated in a hairy, glandular calyx of fused sepals. The five petals are creamy white or pink-tinged in color and each has four to six long, fringelike lobes at the tip.
Silene sargentii is a species of flowering plant in the family Caryophyllaceae known by the common name Sargent's catchfly. It is native to the western United States, where it is known from the mountain ranges straddling the California-Nevada border east of the Sierra Nevada. It is also known from one disjunct occurrence in central Washington. It grows in rocky mountain habitat in subalpine and alpine climates. It is a perennial herb growing from a woody, branching caudex and taproot, sending up several decumbent or erect stems and shoots. It grows no more than about 20 centimeters tall, often taking a clumpy form. The fleshy leaves are widely lance-shaped and a few centimeters in length, most of them occurring around the caudex. Each flower is encapsulated in a hairy, glandular calyx of fused sepals which has stark purple veining. The petals are white to deep pink and each has two or more rounded or pointed lobes at the tip.
Penstemon pinorum is a rare species of flowering plant in the plantain family known by the common names Pine Valley penstemon and pinyon penstemon. It is endemic to Utah in the United States, where it is known only from an area along the border between Washington and Iron Counties.
Penstemon rhizomatosus is a rare species of flowering plant in the plantain family known by the common names Scheel Creek beardtongue and rhizome beardtongue. It is endemic to Nevada in the United States, where it occurs only in the Schell Creek Range of White Pine County.
Penstemon degeneri is a species of flowering plant in the plantain family known by the common name Degener's beardtongue. It is endemic to Colorado in the United States, where it occurs in and around the Arkansas River Canyon in Fremont, Custer, and Chaffee Counties.
