Longitudinal sections of Magnolia denudata flower. For abbreviations, see caption for Figure 1. Specimen number NWU00032054-4405, deposited at Northwest University, China. a. Radial section showing a carpel and its relationship to the floral axis to the right. Bar = 1 mm. b. Detailed view of the ovule in Figure 2a. Note the relationship between the ovule, descending ovular bundle, and ventral bundle. Bar = 0.1 mm. c. Detailed view of the dorsal bundle in Figure 1a. Note the relationship among the ascending ventral bundle (vb, blue arrows), descending dorsal bundle (db, blue arrows), and ascending stelar bundle (sb). Bar = 0.1 mm. d. Dorsal (db, blue arrows) and stelar bundles (sb) in another carpel. Bar = 0.2 mm. e. Vessel element (blue arrow) in an amphicribral cortical bundle, with central xylem. Bar = 50 μm. f. Xylem (tracheids, white arrow) sandwiched between phloem (sieve elements, yellow arrows) in the amphicribral ovular bundle. Bar = 0.1 mm. g. An ovular bundle (ob) supplying the ovule and ascending along the carpel margin (blue arrow). Bar = 0.2 mm. h. Tangential section showing anastomosing cortical bundles (cb) connected to ovular bundles (ob). Note the branching (blue arrow) of the cortical bundles, and their relationship to the ovular bundles. Bar = 0.2 mm. i. Tangential section showing a dorsal bundle branching pinnately. Bar = 0.2 mm.