Abstract: An apparatus bounds and retains the medium in which a transplantable plant is grown, and promotes the production of lateral root tips by such a plant at all levels in the growth medium. The apparatus includes a sheet having a plurality of hollow protuberances formed with proximal protuberance openings that communicate with distal protuberance openings. The protuberances provide pathways that mimic the natural tendency of the plant roots, so as to decrease the likelihood of the root tips evading the protuberances and promote root-tip growth towards the distal protuberance openings whereby air-root pruning is assured.

Abstract: A plant container system that has sufficient stability to remain upright under strong winds. The system comprises a rigid spacer that defines a perimeter, a plurality of plant containers disposed about the perimeter of the rigid spacer, and a plurality of fasteners for firmly securing the rigid spacer to the rim region of each container, wherein each container has a rim region and is stabilized by the other containers; Accordingly, the spacer secures, couples or links a plurality of containers together in a configuration that stabilized all of the containers. The system is well adapted for use in pot-in-pot production of plants.

Abstract: A new and distinct lacebark elm tree, particularly distinguished in having an attractive upright-oval form, dark yellow-green leathery leaves and exceptional wood strength. The tree is easily propagated from cuttings to produce trees having a strong central leader and good stem taper without staking. The tree has proven resistant to common elm insects and diseases. The observed tree produces few seeds, none of which have been viable.

Abstract: A new and distinct cultivar of river birch tree, Betula nigra, named ‘WHIT XXV,’ characterized as having a tree form that is broadly pyramidal to oval and may be grown with a single stem or multiple stems for greater landscape appeal. The bark of the ‘WHIT XXV’ is creamy-white during the late summer, fall and winter, developing its coloration at a young age when most stems are about 0.75 to 1.0 inch in diameter. The leaves are dark green of moderate size and turn yellow-gold in the fall.

Abstract: A base for various plant containers, including containers having flexible sidewall panels with protuberances that retain the base and containers that integrate the base into a unitary container structure. The base includes an upper surface that intercepts plant roots to prevent root circling and, preferably also prevents a perched water table. The upper surface of the base may be convex and includes a plurality of channels that direct the roots in a generally radial direction. Accordingly, roots are redirected radially and prevented from circling. The roots may also be directed radially into air-root-pruning protuberances in the panel. The base may have a perimeter resting on, in or between protuberances of an air-root-pruning panel or specific elements, whether protuberances or not, in the panel to retain the base in position relative to the sidewall panel.

Abstract: A new and distinct variety of crapemyrtle, Lagerstroemia indica, which is characterized by a dense, upright growth habit; leathery leaves which emerge crimson and change to dark green; low seed production (plant is semi-sterile); inflorescences which are 4 to 14 inches tall and 4 to 12 inches wide; flower buds which are green to crimson; and flowers which are white with transition to light crimson. The new variety is also characterized by a long bloom period.

Abstract: A new and distinct variety of crapemyrtle, Lagerstroemia indica, which is characterized by a slow to moderate growth habit; leathery leaves which emerge crimson and quickly change to medium green; moderate seed set; inflorescences which are 8 to 16 inches tall and 6 to 10 inches wide; flower buds which are oxblood red; and flowers with tightly grouped and highly wrinkled petals. The new variety is also characterized by a long bloom period.

Abstract: A new and distinct variety of crape myrtle, Lagerstroemia indica, which is characterized by a dense, upright growth habit; leathery leaves which emerge crimson and change to dark green; low seed production (plant is semi-sterile); inflorescences which are 4 to 14 inches tall and 4 to 12 inches wide; flower buds which are green to crimson; and flowers which are white with transition to light crimson. The new variety is also characterized by a long bloom period.

Abstract: A new and distinct variety of crape myrtle, Lagerstroemia indica, which is characterized by a slow to moderate growth habit; leathery leaves which emerge crimson and quickly change to medium green; moderate seed set; inflorescences which are 8 to 16 inches tall and 6 to 10 inches wide; flower buds which are oxblood red; and flowers with tightly grouped and highly wrinkled petals. The new variety is also characterized by a long bloom period.

Abstract: A new and distinct cultivar of winter hardy hibiscus named ‘Whit XX’ is the result of a chance seedling among a seedling population specifically grown for the purpose of screening for variations. This new and distinct cultivar is characterized by being dwarf in stature relative to the species and all other seedlings from the same parent, has blood red flowers that are between about 3.5 and about 6 inches in diameter. The plant is further characterized as having unusually dark green, broadly lanceolate leaves, with a uniform growth habit of dense, stiff branches. Flower production occurs from early July to frost in north central Oklahoma.