Figs. 24–32. Mourera fluviatilis: structure of bracts and flowers during inflorescence development. 24. Dithecous terminal bract, seen from upper side. Distal blade portion removed (*). Both sheaths are provided with fringed wings: lower wings of both sheaths (only lW observable) continue into blade margin, upper wings (uW/uW') are separate. Black arrow points to warts. Scale bar = 1 mm. 25–26. Distal and proximal view of two dithecous lateral bracts (B10'/B11'), with crest-like blade (*). The distal sheath of each bract consists of two wings (duW and dlW) which embrace a spathella with flower (Sp). Proximal sheaths of each bracts with fringed wings (puW and plW). Scale bar = 1 mm. 27–29. Dithecous lateral bract (= B1' in Fig. 22
), shown from the insertion area and from the side, presented as SEM graph and as drawing. Rudimentary blade (asterisk) coiled towards upper side. Distal sheath with nearly smooth wings (duW/dlW), proximal sheath with fringed wings (puW/plW). Scale bar = 1 mm. 30. Schematical drawing of cross sections of three consecutive lateral bracts (Bx, Bx + 1, Bx + 2). The distal sheath (with wings duW/dlW) embraces a spathella (Sp) with flower (F). The proximal sheath (puW/plW) of each bract envelopes the distal sheath of the next younger bract. 31. Last-formed bracts (B16–B20) of young inflorescence. Bract 16 partially removed in order to show flower primordium (F) in its distal sheath. F arrow points to position of next younger floral primordium (hidden). Note warts on inflorescence axis. Scale bar = 100 µm. 32. Two flower primordia (F) after partial removal of three bracts (Bx, Bx + 1, Bx + 2). Each flower primordium is surrounded by a young two-lobed spathella (Sp). Scale bar = 100 µm.
