Scientific Name – Flourensia cernua DC.
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.
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
Trees and shrubs
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.
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
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.
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 - Alpine endemic species which grows on calcareous rocks, cultivated as ornamental species for rock garden.
Harpephyllum caffrum - evergreen tree, endemic to southern Africa, Eastern Cape to KwaZulu-Natal and southern Mozambiqului, grows in coastal forests.