. 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. THE FOUR O'CLOCK FAMILY NYCTAGINACE^ Lindley HIS family, famiKarly illustrated by the Four O'clock of our gardens, is mainly composed of herbaceous plants, but there are a few genera of trees and shrubs in tropical regions. In all there are some 17 genera and 250 species or more, widely distributed, but most abundant in tem- perate and tropical America. The flowers are quite large and showy, or very in- conspicuous; the c
. 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. THE FOUR O'CLOCK FAMILY NYCTAGINACE^ Lindley HIS family, famiKarly illustrated by the Four O'clock of our gardens, is mainly composed of herbaceous plants, but there are a few genera of trees and shrubs in tropical regions. In all there are some 17 genera and 250 species or more, widely distributed, but most abundant in tem- perate and tropical America. The flowers are quite large and showy, or very in- conspicuous; the calyx is usually coroUa-like, 4-toothed or 5-toothed, or sometimes lobed; there is no corolla; the stamens are hypogynous, with filiform filaments and 2-celled anthers; the ovary is enclosed by the tube of the calyx, i-celled, containing I ovule. The fruit is either dry or somewhat fleshy, ribbed and grooved. Only the following genus is represented in our arborescent flora. BLOLLY GENUS TORRUBIA VELLOZO Species Torrnbia longifolia (Heimerl) Britten Pisonia discolor longifolia HeimerL Pisonia longifolia Sargent ORRUBIA comprises some 15 species of trees and shrubs, natives of tropical America. The Blolly occurs in southern Florida, on the Bahama islands and in Cuba, grow- ing usually within the influence of salt water, though also in'hammocks a few miles inland, and reaches a maximum height of about 16 meters, with a trunk up to 5 dm. in diameter, usually much smaller, however, and often shrubby. It has been confused with Torrvbia ohtusata (Jacquin) Britton, a related species with much larger and thicker leaves, which grows on the Bahama islands. Its thin brown bark is scaly, its smooth young twigs yellowish, turning gray. The smooth, mostly opposite leaves are pbovate to oblanceolate, rather thick, rounded or occasionally notched at the apex, narrowed to a ^'°- ^^^' ~ ° ^'^â wedge-shaped base, 2 to 5 cm. long, the midvein prominent, the lateral veins ob- 382. Please note
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