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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
Citrus - citrus
Bark smooth, thin, gray-brown to green. Most species have a single trunk, hardwood. Citrus paradisi (Grapefruit) has a thick trunk 0.5 - a, 75 m in diameter. Stalk young are edges, green. Stalk elderly are circular in section. Capparis spinosa L. - caper
Undergrowth, with root wood and lignificate stems at the base, erect in the basal portions. Leaves alternate, two stipele turned into thorns, persistent or obsolete, short stalks, oval or subrotund language, edge entire, flashy, green-glauca. Flowers solitary, peduncle long in upper leaf axilla; calyx of 4 sepa green, Corola of 4 white petals, stamens many red-purple color. Symphoricarpos - Hurmuz
Shrubs decide, prostate or erect, 90-120 cm, originating in the U.S.. Buds scaly, 1.5 mm long. Leaves simple, opposite, short petiolate, 7 cm long. Raceme blossom. Campanulata Flowers in raceme children. Calyx tube slightly globos; Corola campanulata, 4-5 lobes. Fruit drupe, 1-1.5 cm in diameter, S. albus and S. occidentalis fruits white, pink-coral S. orbiculatus fruit. A fruit contains two seeds oblongata. Canarina canariensis
Canarina canariensis - herbaceous, commutes glaucescenta. Endemic from the Canary Islands, Tenerife, grows at the edge of forests, from 300 to 1000 m altitude. Quercus cerris L. - Turkey Oak
Quercus cerris - a species native to south-eastern Europe, cultivated as an ornamental tree, singly or in small groups. Magnoliopsida
Citrus - citrus
Bark smooth, thin, gray-brown to green. Most species have a single trunk, hardwood. Citrus paradisi (Grapefruit) has a thick trunk 0.5 - a, 75 m in diameter. Stalk young are edges, green. Stalk elderly are circular in section. Rhaponticum scariosum
Rhaponticum scariosum - Alpine endemic species, grows on mountain pastures from 750 to 2500 m altitude. Leonotis Leonurus
Leonotis Leonurus - a species native to southern Africa but cultivated throughout the world as ornamental species in parks and gardens. Leonotis grecum derived from 'Leon' = lion, and 'Otis' = ear alluding to the shape of the corolla. Fothergilla
Fothergilla gardenii - small shrub, up to 1 m high. Leaves 4.8 x 1.5-5 cm, edge to the top gear. Flowers white with pink ears appear before the leaf in the terminal, stamens numerous. Blooms in April-May, prefers moist soil, well-drained, in full sun. Prunus cerasifera - corcodus
Prunus cerasifera - is grown for its edible fruit jams are made and cultivars and varieties are found all over the world species grown as ornamentals in parks and gardens, or green street. |
 
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