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Scientific Name – Flourensia cernua DC. Synonim – Common name(s) – tarbush, blackbrush, varnishbush, hojasé, Yerba del Hule. Distribution and Habitat – common (endemic) on dry plains to the Chihuahuan Desert, Arizona, California, New Mexico and Texas at elevation ranging from 400-2000 m. Is associated with Hilaria mutica, Larrea tridentate, Prosopis sp., Scleropogon brevifolius. It is found in limestone or calcareous, deeper soils. Description – deciduous shrub, erect to procumbent, 30 -200 cm tall, much branched. Twig light brown, gray, slender, resinous, pubescent; trunk gray to dark gray, glabrous, sparingly striate, resinous. Leaves alternate, simple, elliptical or oblong to oval, 1.6-2.5 x 0.6-1.2 cm, acute, margins entire, adaxially green and glabrous, abaxially paller and glabrous or pubescent, veins often black; petioles 1-2.5 mm long, puberulent. Inflorescences small, solitary. Flowers with 3 series bracts; bracts linear; ray flowers absent; disk flower 12-20, yellow, resinous. Flowering in July to December. Fruit achene, 0.5-1 cm long, oblong, compressed, villous; papus of 2-4 unequal bristles, 2.5-3.3 mm long. Growth rate – slow Requirements – prefers heavy, deep soils; full sun, light water. Propagation – by seeds. Properties and Uses – mature fruit is poisonous to sheep and goats. In Mexic, an infusion of the leaves is drunk frequently to treat various gastrointestinal ailments. Curiosity – the genus Flourensia, tribe Heliantheae, consist of 32 species of resinous shrubs that grow from southern United States south to Argentina and Chile. Bibliography A.Powell – Trees and Shrubs of the Trans-Pecos and adjacent areas- University of Texas Press, 1998 James Stubbendieck, Stephan L. Hatch, L.M. Landholt – North American Wildland Plants – University of Nebraska Press, 2003 Mahendra Rai, Maria Cecilia Carpinella – Naturally Occuring Bioactive Compounds- Elsevier Science, 2006
See also
 Trees and shrubs
Lonicera xylosteum
Lonicera xylosteum - shrub originating from Europe, the Caucasus and Siberia, growing at the edge of deciduous forests, from lowland to 1600 m altitude. They prefer warm places and limestone associated with Cornus sanguinela, Ligustrum vulgare, Prunus padus and Rubus idaeus. Magnolia baillonii
Tree, 40 m high, truncated 1 m in diameter. Stalk, leaf stalks are brown and language violated. Petiole 1.5-3 cm long. Leaves elliptic, ovat-elliptic, 6-22 x 4.7 cm, protruding ribs on both surfaces, base cuneata, top acuminata. Bonsai of Araucaria heterophylla
ARAUCARIA heterophylla is originally from Norfolk Island, Australia. Dioecious tree, 25 meters high. Crown symmetrical, conical, branches located in verticil. Leaves evergreen, in verticil, piled, covering the stem. Male cones 3,5-7 cm long, oblong, female cones 10-13 cm long, ovoid. Dombeya tiliacea (Endl.) Planch.
Shrub or small tree, 3.10 x 2.7 m, trunk branched, bark dark gray, rough. Leaves alternate, 4.9 x 3-7 cm, three-lobed basis cordata, margine teeth face bottom covered with fine hairs, stalks pelos, 1-3 cm. Flowers campanulata, 3-4 cm diameter, axillary or terminal, solitary or grouped in a raceme, petals white, obovata. Jasminum nudiflorum Lindl.
Decidua species native to China. Green stems, 60-90 cm high, 1-2 m diameter, edges, form adventitious roots. Brownish-red buds, ovoizi. Decidue leaves, opposite, pinnate-compound, 3 leaflets oblong, Sesi. Flowers solitary, six petals, 1-2 cm in diameter. Flowering period from January to March, before leaf. Baca fruit, fleshy, ripening black. Magnoliopsida
Cichorium intybus - Chicory
Herbaceous biennial or perennial. Stem erect, with branches hispida, geniculate .30 to 120 cm tall. Roots spindle, long on break leaving a bitter white latex. Basal leaves in rosette, petiolate, lamina oblong-lanceolata, lirat-pinatifide or toothed, 30 x 12 cm. The leaves are caulinare Sesi, alternate, oblong-lanceolata. Campanula spicata
Campanula spicata - Alpine endemic species which grows on calcareous rocks, cultivated as ornamental species for rock garden. Harpephyllum caffrum
Harpephyllum caffrum - evergreen tree, endemic to southern Africa, Eastern Cape to KwaZulu-Natal and southern Mozambiqului, grows in coastal forests. Hamamelis mollis
Species from China (Anhui, Hubei, Hunan, Jiangxi, Sichuan), at altitudes of 800-1400 m, where grows beside Quercus serrata , Corylopsis sinensis , Castanea seguinii , Rhododendron simsii , Hosta ventricosa and Linder sp. . Horminum pyrenaicum
Horminum pyrenaicum - herbaceous plant, perennial, rizomatoasa, native to Europe, alpine meadows and subalpine grows on limestone bedrock, from 1500 up to 2500 m altitude. |
 
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