Table 1 in Michaelmoelleria (Gesneriaceae), a new lithophilous dwelling genus and species with zigzag corolla tube from southern Vietnam

Table 1. Comparison of morphological characters Michaelmoelleria, Cathayanthe, Deinostigma and Tribounia.
CharactersMichaelmoelleriaCathayantheDeinostigmaTribouniaLife formperennialperennialperennialprobably annualStemglabrescent to glabrous when ageingrhizomatous, stemlessmultifarious, from short and constrictive to procumbent; from glabrous to pubescent and puberulentwith hairs and often hooked at the tipLeavesalternate on elongate aeriald stem, 12-20 or morefew, 4-8, basalalternate, numerousopposite, numerousLea-bladeovate to elliptic, both surfaces glabrousoblanceolate to obovate or elliptic, adaxially whitish to brownish sericeous, abaxially appressed pubescentmultifarious, slightly peltate or not, glabrous or eglandular pubescent on both surfacesovate, densely pubescent adaxially and abaxially mostly with eglandular pubescents (occasional glandular pubescent present in Tribounia grandiflora)CalyxActinomorphic, 5-parted to the basezygomorphic, 2-lippeddivided to base, elliptic, those on ventral side slightly longer and widerequally 5-partite almost to baseCorollatube narrowly curving to zigzag infundibuliform-tubular, and bent at about 90° angle in the middle of corolla tube, and gradually slightly swollen from the middle to the base of the tube; dramatically enlarged to be trumpet-shaped from the middle of the corolla tube toward the limbtube tubular, nearly straight to slightly bent, slightly gibbous abaxially toward limb, much longer than limbtube infundibuliform, lower lip 3-lobed, upper lip 2-lobed, lobe apices roundedzygomorphic, of a narrow lower tube which widens into an infundibuliform upper tube which has a prominent boss on the dorsal surfacewFertile stamens number4222Ovarycylindric-linear, glabrous, 3.5-4 cm longnarrowly ellipsoid, ca. 6 mm longfusform, long or short, with different indumentum, from glabrous to glandular- and eglandular-puberulentcylindrical, densely glandular pubescent, ca. 6 mm long in T. venosa, 7.5-11.0 mm long in T. grandifloraStigma2-lobed, often gathering togethersubcapitate, lower part developingligulate, upper lip usually vestigial and only lower lip developing, broad, flat and weakly 2-lobedcapitate