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
Deciduous tree, native (Romania), 15 m high. The stem is often crooked, irregular. Crown rare, bright, large and irregular. Bark is thick, deeply wrinkled, forming a cracked ritidom in rectangular plates, dark brown.
Quercus robur - oak, Tufan
native trees (Romania), robust 50 m high, 1-2 m stem diameter, crown wide, irregular. Ritidom dark brown, deep furrow. Crown deep and wide, with vigorous branches, units, stretched horizontally, can cover the maximal development of 200-300 sqm. Lujerii annually, vigorous, edge, brown-olive trees, glabra, with small lenticele rare.
Genus was created by Portuguese botanist João de Loureiro (1717-1791) in the 1790 Flora Cochinchinensis for Campsis grandiflora. Linne named species with TECOM radicans and Thunberg gave the name of Bignonia radicans.
Firmiana simplex - also known as Sterculia platanifolia, was named in honor of Karl Joseph von Firmiana (1718-1782).
Firmiana simplex - ornamental species grown in parks and gardens in shady and protected from winds exhibitions.
Thunbergia alata - black-eyed Susan
Thunberg spelled - a species native to tropical Africa, but common as ornamental plants.
Nepeta cataria has similar properties with valeriana, amaro-tonic and sedative antispasmotica.
Nepeta cataria var. citronelol citriodora contains more essential oil used as perfume industry.
Gossypium herbaceum - Cotton
Gossypium herbaceum - Cotton fiber is the most popular material obtained from this plant and the second is cotton oil rich in protein.
Cyphomandra betacea - small tree, native of Peru and Chile, in tropical forests, at 700-2000 m altitude. It is grown in Brazil, Argentina, Colombia, Venezuela and New Zealand for its edible fruit, or ornamental tree. Fruits can be eaten cooked or raw in salads and desserts. It is shown that the seeds and skin to be removed. Fruits contain protein, vitamin C and E, vitamin A.