. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Fig. 521. — Lignum Vitae. southern relative G. officinale, the resin of which, however, is preferred. NORTHERN PORLIERA GENUS PORLIERA RUIZ AND PAVON Species Porliera angnstifolia (Engelmann) A. Gray Guaiacum angustifolium Engelmann ORLIERA contains several species of shrubs and trees, distributed from the Sonoran region to Chile; they differ from Guaiacums in having filaments which are appendaged by a scale, and their le
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Fig. 521. — Lignum Vitae. southern relative G. officinale, the resin of which, however, is preferred. NORTHERN PORLIERA GENUS PORLIERA RUIZ AND PAVON Species Porliera angnstifolia (Engelmann) A. Gray Guaiacum angustifolium Engelmann ORLIERA contains several species of shrubs and trees, distributed from the Sonoran region to Chile; they differ from Guaiacums in having filaments which are appendaged by a scale, and their leaflets are narrow. The generic name commemorates Porher de Baxamar, a Spanish patron of Botany. The type species is the South American Porliera hygrometra Ruiz and Pavon. Porliera angustijolia inhabits plains or prairies in Texas and northern Mexico. While usually a shrub, it sometimes becomes a tree up to 7 meters in height, with a trunk up to dm. thick, its branches spread- ing or straggling. The leaves have from 4 to 6 pairs of linear coriaceous leaflets, and are short-stalked and smooth; the leaflets are cm. long or less, 2 to 3 mm. wide, distinctly netted-veined, minutely tipped, somewhat oblique at the sessile base. The flowers are borne at the ends of short branches and are i to 2 cm. Fig. 522. — Northern Porliera. broad; the concave round sepals are about 5 mm. long, half as long as the elUp-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Britton, Nathaniel Lord, 1859-1934; Shafer, John Adolph. New York : H. Holt and Co.
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