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
Bush deciduu, wood. Iregulata crown, branches couples glabra, 4-5 m high. Leaves alternate, simple, rough, 12 x 2-4 cm long, the upper part at first is tomentoasa then becomes glabra, opaque green, the underside is silver viloasa easy.
Ceiba pentandra - tree, native of tropical America, seen as a species cultivated in the Philippines, growing in arid regions,forests and grasslands from sea level to 1000 m altitude.
Fraxinus excelsior - Ash
Deciduu tree, 30-40 m high, stem right, branched at the top, crown ovoid, large and rare. A young bark is smooth, light gray green and mature forms at the thick crust with a small crack, dark color. Lujerii round, flattened at the bud, glabra, green-olive trees, with dark buds.
Genus belongs to the Malvaceae, tribe Malvavisceae, which is characterized by a number of corporate sites is double that of carpelelor.
Delosperma cooperi originated southern Africa. Prostrata or erect stem, grows up to 13 cm high and 60 inches wide. Leaves opposite, succulent, cylindrical or 3 angles, without stipule. Flowers solitary or Cime, terminal or axillary, 8 cm diameter, open purple, calyx with 5 lobes unequal, inferior ovary with 5 rooms.
Cornus sanguinea grows throughout Europe, rarer in the north, in the thicket, forest edges and edges of streets, from plain to 1000 m altitude.
Originally from Europe and western Asia, growing on wet soils and peat, from plain to 1800 m altitude.
Stachys palustris L. - marsh Jales
Herbaceous perennial, rhizome tuberizat, crawler. Stem erect, rarely branched, tetragon, dark pink-purple, with scrub edge stem, 30-120 cm tall. Caulinare upper leaves are Sesi, amplexicaule, narrow-lanceolata, evening and slightly wavy edge, basal leaves are short stalks.
Lotus maculatus Breitf.
Herbaceous, with the stem wood, under-shrub pendulum. Strain up to 1.5 m high, glabra, gray-green silky, internoduri 35-45 mm stipele children. Leaves imparipenat, 5 folio; foliole 10-25 x 1 mm, subulate or linear, convex upper and concave lower edges entire, top obtuse-rounded, surface moderately pubescent.