Sempervivum arachnoideum, the cobweb house-leek, is a species of flowering plant in the family Crassulaceae, native to the Alps, Apennines and Carpathians. Growing to 8 cm (3 in) tall by 30 cm (12 in) wide, it is a rosette-forming succulent perennial, valued in cultivation for its ability to colonise hot, dry areas via offsets.
Aeonium haworthii, also known as Haworth's aeonium or pinwheel, is a species of succulent flowering plant in the family Crassulaceae. It is grown as a houseplant in temperate regions. It has gained the Royal Horticultural Society's Award of Garden Merit, as has the cultivar ‘Variegatum’.
Lewisia cantelovii is an uncommon species of flowering plant in the family Montiaceae known by the common name Cantelow's lewisia. It is endemic to California, where it is known from the northeastern mountain ranges from the Klamath Mountains to the northern Sierra Nevada. It grows in rocky, moist mountain habitat. This is a perennial herb growing from a short, thick taproot and caudex unit. It produces a basal rosette of thick, fleshy, blunt-tipped spoon-shaped leaves with serrated edges. The inflorescence is a very slender erect stem up to 45 centimeters tall topped with a spreading panicle of flowers and glandular, toothed bracts. Each flower has 5 to 7 oval petals each one half to one centimeter long. The petals are white or very pale pink with sharp dark pink veins. At the center of the flower are five stamens tipped with dark pink anthers.
Lewisia columbiana is a species of flowering plant in the family Montiaceae known by the common name Columbian lewisia. It is native to the western United States and British Columbia, where it grows in rocky mountain habitat. It is a perennial herb growing from a short, thick taproot and caudex unit. It produces a basal rosette of many thick, fleshy, tapering, blunt-tipped or pointed leaves with smooth edges, each 2 to 10 centimeters long. The inflorescence arises on several stems up to about 30 centimeters tall, each stem bearing an array of up to 100 flowers each. Near the flowers are small, pointed bracts tipped with shiny spherical resin glands. The flower has 4 to 11 petals, each up to about a centimeter in length and oval in shape with a notched tip. The petals are white to pale pink, usually with sharp dark pink veining.
Lewisia congdonii, known by the common name Congdon's lewisia, is a rare species of flowering plant in the family Montiaceae.
Lewisia cotyledon is a species of flowering plant in the family Montiaceae known by the common names Siskiyou lewisia and cliff maids. It is native to southern Oregon and northern California, where it grows in rocky subalpine mountain habitat.
Lewisia disepala is a species of flowering plant in the family Montiaceae known by the common name Yosemite lewisia.
Lewisia kelloggii is a species of flowering plant in the family Montiaceae known by the common name Kellogg's lewisia. It is endemic to the Sierra Nevada of California, where it is known from several sites high in the mountains. It grows in rocky mountain habitat in granite and slate substrates. This is a perennial herb growing from a thick, short taproot and caudex unit. It produces a basal rosette of many thick, leathery, spoon-shaped leaves up to 9 centimeters long. The inflorescence bears several flowers, each on a very short stalk. The flower has 5 to 13 shiny white or pinkish petals just over a centimeter long. Under the petals are two sepals and two similar bracts lined with spherical resin glands.
Lewisia longipetala is a rare species of flowering plant in the family Montiaceae known by the common names long-petalled lewisia and Truckee lewisia. It is endemic to the Sierra Nevada of California, where it is known from less than 20 locations in areas not far from Lake Tahoe. It grows in subalpine and alpine climates in moist areas in rocky habitat, such as talus that retains patches of snow year-round. Most specimens grow on north-facing slopes with little surrounding vegetation. The plant thrives in the snow, growing largest and most densely in areas of high snowpack and becoming easily water-stressed when far away from areas with snow.
Lewisia nevadensis is a species of flowering plant in the family Montiaceae known by the common name Nevada lewisia. It is native to much of the western United States, where it grows in moist mountain habitat, such as meadows. This is a small perennial herb growing from a taproot and caudex unit. It produces a basal rosette of several narrow, fingerlike to threadlike fleshy leaves up to 13 centimeters long. The inflorescence is a bundle of short stems a few centimeters tall each bearing a flower. The flower has 5 to 10 shiny white to pale pink petals each 1 to 2 centimeters long, pointed or with blunt tips. At the center are many stamens. This is sometimes grown as an ornamental plant suitable for alpine and rock gardens.
Lewisia pygmaea is a species of flowering plant in the family Montiaceae known by the common name alpine lewisia and pygmy bitterroot. It is native to western North America from Alaska and Alberta to California and New Mexico, where it grows in many types of moist, rocky mountain habitat, such as gravel beds and sandy meadows. This is a highly variable species with a wide distribution, and it often hybridizes with other Lewisia species, making identification difficult. In general, this is a petite perennial herb growing from a taproot and caudex unit, and producing a basal rosette of several leaves 2 to 8 centimeters long. The leaves are narrow but thick and fleshy, blunt-tipped, and linear to lance-shaped. The inflorescence is usually made up of a few very short stems each bearing one or more flowers which appear to be sitting on or within the basal leaf rosette. Each flower has 5 to 9 white, pink or red petals which may or may not have dark veining or striping. The petals are 4 millimeters to 1 centimeter long.
Lewisiopsis tweedyi is a flowering plant and sole species in genus Lewisiopsis. The species, formerly known as Cistanthe tweedyi and Lewisia tweedyi, is now classified in the family Montiaceae. The plant is known by the common names Tweedy's pussypaws, Tweedy's lewisia, or Tweedy's bitterroot. It is endemic to western North America in north-central Washington and adjacent British Columbia. It commonly grows on well-drained slopes often on rocky slopes or in rock crevices from low elevation ponderosa pine sites up to the drier part of the Grand Fir zone of the North Cascades. The flowers usually have a coral, apricot, or pink color.
Sedum spathulifolium is a species of flowering plant in the family Crassulaceae known by the common names broadleaf stonecrop, yellow stonecrop, and Colorado stonecrop. An evergreen perennial, it is native to western North America from British Columbia to southern California, where it can be found often in shade in many types of rocky habitat in coastal and inland hills and mountains.
Digitalis ferruginea, the rusty foxglove, is a species of flowering plant in the genus Digitalis of the family Plantaginaceae. It is native to Hungary, Romania, Turkey and the Caucasus. It is a biennial or short-lived perennial plant growing to 1.2 m, which forms a rosette of oblong dark green leaves and carries spikes of brown, tubular flowers in summer.
Agave parviflora is a species of succulent perennial flowering plant in the asparagus family, known by the common names Santa Cruz striped agave, smallflower century plant, and small-flower agave. It is native to Arizona in the United States and Sonora in Mexico.
Agave potatorum, the Verschaffelt agave, is a species of flowering plant in the family Asparagaceae. A smallish and attractive succulent perennial, it is native to partial desert areas of Mexico from Puebla south to Oaxaca.
Globularia cordifolia, the heart-leaved globe daisy, is a species of flowering plant in the family Plantaginaceae, native to the mountains of central and southern Europe, and western Turkey.
Primula obconica is a species of flowering plant in the family Primulaceae, native to China. It is a short-lived evergreen perennial growing to 40 cm (16 in) tall by 25 cm (10 in) broad, with rosettes of coarse, heart-shaped leaves, and thick stalks bearing umbels of lavender flowers in late winter and early spring.
Primula pulverulenta, the mealy primrose or mealy cowslip, is a species of flowering plant in the family Primulaceae, native to damp habitats in China. It is a herbaceous perennial growing to 100 cm (39 in) tall by 60 cm (24 in) broad, with strong stems of deep pink flowers arising from basal rosettes of leaves in early summer. The flowers are grouped at intervals along the stem in a tiered formation, hence the common name "candelabra primula" which is often applied to this and other species with a similar arrangement.
Saxifraga callosa, the limestone saxifrage, is a species of flowering plant in the family Saxifragaceae, that is native to maritime alpine habitats in Western Europe. Growing to 50 cm (20 in) tall by 100 cm (39 in) broad, it is a clump-forming evergreen perennial with rosettes of narrow grey-green leaves that are coated in lime. The starry, pure white flowers are borne in long panicles in spring.
