TABLE 1 in Two new diploid species of Isoetes (Isoetaceae: Lycopodiopsida) from Southeastern China based on morphological and molecular evidence

TABLE 1. Comparative accounts on the morphology of megaspores and microspores of Isoetes species in China.
I. changleensisI. yuhangensisI. baodongiiI. sinensisI. longpingiiI. xiangfeiI. orientalisI. taiwanensisI. yunguiensisI. hypsophilaI. shangrilaensisMegaspore diameter (μm)246–314270–324390–510317–424310–410390–450350–460280–340340–430361–510207–273Mean megaspore size (μm)284302450378350430420312390450245Ornamentation of megasporesproximal surfacetuberculaterugulateechinate-cristateechinatetuberculate-cristatecristate-reticulatecristate-reticulatetuberculatecristate-reticulatelevigatelevigateEquatorial surface (girdle)rugulatesmooth/loss///smoothlosslosssmoothdistal surfacerugulaterugulateechinate-cristateechinate-cristatetuberculate-cristatecristate-reticulatecristate-reticulatetuberculate-cristatecristate-reticulatelevigatetuberculate-rugulateRange microspore size (μm)14–2016–2622–2720–2927–3026–2820–3820–2820–2519–2511–24Mean microspore size (μm)1821252529273424222219Ornamentation of microsporesblunt-tipped echinatesharp-tipped echinateechinateechinateechinateechinateechinate-tuberculateechinatelevigate-granulaterugulateechinate-cristateChromosome number2222224444446622222222Data Sourcethis studythis studyLu et al. 2021Liu et al. 2008Shu et al. 2022Shu et al. 2022Liu et al. 2008Liu et al. 2008Liu et al. 2008Li et al. 2019Li et al. 2019 Shu et al. 2022
Note:/ represents no data.