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Viburnum australe
''Viburnum australe'' C.V.Morton, known by the common name Mexican arrowwood, is a woody plant in the family Adoxaceae (previously Caprifoliaceae).〔(Muller, C. H. (1939). Donoghue, M. J., Eriksson, T., Reeves, P. A., & Olmstead, R. G. (2001). Phylogeny and phylogenetic taxonomy of Dipsacales, with special reference to Sinadoxa and Tetradoxa (Adoxaceae). Harvard Papers in Botany, 6(2), 459-480. ), accessed 08.14.2013.〕〔(APG III VASCULAR PLANT FAMILIES and GENERA: List of Genera in ADOXACEAE ), Angiosperm Phylogeny Group places Viburnum within Adoxaceae, accessed 08.14.2013.〕 It is found in northeastern Mexico and western Texas.
==Description==
''Viburnum australe'' grows as a deciduous, multi-stemmed shrub, reaching in height.〔(Donoghue, M.J. 1997. Viburnum. A flora of the Chihuahuan Desert region; M.D. Johnston (ed.) privately published. ), accessed 08.13.2013.〕
:Branches angled, dull, glabrous, pale; branchlcts similar, sparsely glandular; leaves opposite, petiolate, the petiole up to 1 cm long, glandular, hispidulous, stipulate, the stipules persistent, borne on the petiole about 1.5 to 2 mm above its base, linear, up to 5 mm long, glandular and hispidulous; blades broadly ovate to suborbicular, the larger 6 cm long by 4.5 cm wide, cordate or subcordate at base, abruptly short-acuminate at apex, conspicuously dentate (the teeth broad, extending to the middle of the blade or below), ciliate, above sparsely but uniformly strigose (the hairs all simple), glabrate with age, beneath glandular, hispidulous on the veins and veinlets, densely bearded in the vein axils; lateral veins 2 to 5, straight, reaching the margin; peduncle up to 3.5 cm long, conspicuously glandular, bearing a few stellate hairs, these with numerous spreading branches; bracts at base of inlorescence conspicuous, up to 1.5 cm long, 2 mm broad at middle, narrowed at base, glandular and sparsely pubescent, the hairs both simple and stellate; cyme up to 5.7 cm wide and 3 cm long, twice compound, the primary rays 6 to 8, very densely glandular; bractlets of cyme linear, glandular, sparingly ciliate; calyx tube 2 to 2.5 mm long, cylindric, densely glandular; calyx lobes about 1 mm long, acute, ciliate with long simple hairs, glabrous on the back, eglandular; corolla 3.5 to 4 mm long, glabrous; stamens slightly exserted, the ilaments about 4 mm long; style glabrous; fruit much lattened, about I cm long, 8 mm wide, and 3 mm thick, leshy, the endocarp 3-sulcate on one face (the central groove very slight, the lateral pronounced) and lightly 2-sulcate on the other, with no ventral intrusion.〔(Morton, C. V. (1933). The Mexican and Central American species of Viburnum. ), accessed 08.13.2013.〕
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