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Fig. 1 | BMC Plant Biology

Fig. 1

From: Origin and evolution of Petrocosmea (Gesneriaceae) inferred from both DNA sequence and novel findings in morphology with a test of morphology-based hypotheses

Fig. 1

Photos of representative habits and flowers of different clades. 1-5 (clade A): 1. habit of P. menglianensis, showing leaves erect; 2-5. flowers of P. menglianensis (2), P. kerrii (3) and P. grandifolia (4-5). Scale bars = 6 cm (1), 6 mm (2), 2.8 mm (3), 5.6 mm (4) and 4.2 mm (5). 6-10 (clade B): 6. habit of P. mairei var. intraglabra, showing leaves arranged in basal rosettes spreading on the ground; 7-10. flowers of P. duclouxii (7), P. coerulea (8) and P. mairei var. intraglabra (4-5), note upper lips reflexed backward. Scale bars = 2.5 cm (6), 4.5 mm (7) and 5 mm (8-10). 11-15 (clade C): 11. habit of P. minor, showing leaves arranged in basal rosettes spreading on the ground; 12-15. flowers of P. iodioides (12), P. sericea (13) and P. minor (14-15), showing the carinate-plicate (galeate) structure of the upper lip. Scale bars = 2.1 cm (11), 3.6 mm (12) (upper lip closed up to 1.45 times), 4.2 mm (13) (upper lip closed up to one time), 4.1 mm (14) and 3 mm (15) (upper lip closed up to one time). 16-20 (clade D): 16. habit of P. forrestii, showing leaves arranged in basal rosettes spreading on the ground, 17-20. flowers of P. barbata (17), showing cilia (hairs) on inner side of corolla tube and the upper lip extended forward, P. mairei (18) and P. forrestii (19-20), showing upper lips extended forward. Scale bars = 1.5 cm (16), 4.5 mm (17), 4.4 mm (18), 3.2 mm (19) and 2.9 mm (20). 21-25 (clade E): 21. habit of P. sinensis, showing leaves arranged in basal rosettes spreading on the ground; 22-25. flowers of P. oblata (22), P. nervosa (23) and P. sinensis (24-25). Scale bars = 3 cm (21), 4.7 mm (22), 5.6 mm (23), 5.3 mm (24) and 4.1 mm (25). Note: The upper lips (two upper corolla lobes) are arranged above and the lower lips (three lower corolla lobes) below in all flowers

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