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
Thunbergia alata - black-eyed Susan
Thunberg spelled - a species native to tropical Africa, but common as ornamental plants.
Diospyros kaki L. - Khaki
Monoecious tree, 6-12 m high. Trunk erect, conical crown, brown bark is exfoliating in small plates. Leaves fell, coriacee, alternate, language oval-elliptic, margin entire, top acuminata, the attenuated, shiny green on top and pubescent towards the bottom, 7-20 x 4.10 cm, petiole 1-1.5 cm long.
Species native to North America, lies at altitudes up to 1500 m in Romania is less common in parks and gardens as ornamental species.
Leaves, branches and bark is an aromatic oil extracts used in medicine.
Syzygium aromaticum - clove
Small, oblong fruit with little pulp. The dried flower buds of this tree are the cloves of commerce. All parts of the tree are highly aromatic. It is used in the form of a paste or mixture as dental cement.
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.
Aquilegia atrata Koch
Herbaceous perennial. Rhizome thick, vertically or diagonally. Stem erect, branched, pubescent, green or red-purple shades, 30-80 cm high. Leaf sectors lobate 3 lobes or parts, green on the upper face and green on the lower glauca
Silene bitlisensis O. Tugay & Ertugrul
Cleome spinosa - flower spider
Herbaceous annual. Stem herbaceous, simple, viscid-pubescent, 1 m high. Leaves alternate, petiolate, palmate-compound. Petiole 10-15 cm long, glandular and pubescent. Folio 5-7, onblong-anceolate to elliptic, top acute - acuminata, the conical, 15 cm long, margin entire, glandular-pubescent on the upper surface and slightly pubescent on the underside. Raceme blossom, dense, compact, terminal.
Impatiens balsamina - a species herbaceous annual, native to China and India. cultivated as ornamental plants in parks and gardens. It can be grown as potted plants, but watered regularly.