..2 Larger knees short, rarely > 4 dm tall, usually columnar or broad and mound-like, with thick, compact bark on top; leafy branchlets ascending from the twigs, secundly erect (the base often curving, the apical portion of the branchlet borne in a vertical plane), except on juvenile trees (which mimic
T. distichum); leaves subulate, spirally arranged, not spreading laterally and featherlike (except on juvenile trees), ascending or appressed; leaves mostly 3-10 mm long (to 15 mm long on juvenile trees); bark thick (1-2.5 cm thick), furrowed, dark-brown, not exfoliating; [trees mainly of fire-maintained habitats: isolated depressions (clay-based Carolina bays, depression ponds), wet pine savannas, pocosins and other wet peaty habitats, domes and stringers in wet prairies, and, less commonly, blackwater swamps and natural lakes]