Scientific Name - Polemonium caeruleum L.
Popular names - Greek valerian, Jacob's Ladder
Distribution and Habitat - originating in the mountains of Europe, wet meadows, from 1500-2300 m altitude.
Description - herbaceous perennial, rhizome white. Stem ribbed, hollow, 30-90 cm high, glabra hairy-glandular at the base and tapered. Basal compound leaves, 10-40 cm, 17-23 segments lanceolate, alternate leaves caulinare. Cimoase inflorescences, corymb, stems pubescent, 2-3 mm, calyx actinomorf, lacini acute, 2-4 mm Corola actinomorfa, white tube, lacinii subrotunde, patents, 11 x 10 mm, purplish at the base with three ribs in darker color, filaments equal in length, pubescent. Blooms in July-August. Fruit pear-shaped capsule, 4-6 mm. Seeds elliptical, 2.8-3.2 x 1.2-1.4 mm, surface slightly shiny, dark purple. 2n = 18
Tolerances - temperate-20 C sites.
Requirements - well-drained moist soil in sunny or semi-shade exhibitions.
Propagation - by seeds sown in spring cold greenhouse.
Cultivars - 'Album' White flowers, 'Blue Pearl' cobalt blue flowers with yellow center.
Properties and Uses - species used as ornamental plants in gardens with spontaneous or rock gardens. Are planted at 30 cm distance between plants.
Helleborus viridis - originating in Spain, France, Italy and Switzerland; grows on calcareous soils from 0 to 1700 m altitude, to the edges of deciduous forests, beech forests and mixed forests, grows in association with Arum dioscoridis, Crocus sp., Cyclamen coum, Fritillaria sp. Hyacinthus orientalis.
Annual U.S. glabra slightly pubescent. Stem erect, branched, 10-50 cm high. Stipelate leaves, opposite, 1.5-5 cm, ovata lanceolata or elliptic, margin crenat-evening, petiole 0.2-1.5 cm. Dioecious, occasionally monoecious.
Petunia hybrida - herbaceous, annual, used as an ornamental species in parks, gardens and terraces. Hybrid species derived from Petunia integrifolia and Petunia axillaris by Atkins in 1834.
Verbascum blattaria - Herbaceous biennial, glabra bottom of the stem and glandular hairs towards the top, grows spontaneously in the desert and the hot side of cultivated fields, rivers and channels, up to 800 m altitude.
Arabis turrita - herbaceous annual native to Europe, growing on limestone cliffs, rocky coasts, in the bushes in the plain region until mountain floor.
Thlaspi montanum L.
Thlaspi montanum var. montanum is toxic and cause death of larvae of Pieris rapa.
Thlaspi montanum var. siskiyouense is a serpentine endemic from southwestern Oregon.
Ribes uva-crispa - agris, grapes bear
Thorny shrub, 1 m high. Gray-brown bark is exfoliating. Rich stem branched divaricata. Branches long, thin, gray-brown with yellow top, pubescent glabrata in youth and adulthood. Leaves simple, cordiforme, 3-5 lobed, toothed, long stalks
Corylus avellana - hazelnut
Corylus avellana - shrub, common in Europe and western Asia, from plains to 1,200 m altitude, increase in association with Acer pseudoplatanus, Crataegus laevigata, Crataegus monogyna, Fraxinus excelsior, Lonicera xylosteum, Salix caprea, Sambucus nigra and Sorbus aria.