TABLE 1 in Three new species of Polystichum (Dryopteridaceae) from Xizang, China based on morphological and molecular evidence

TABLE 1. Key morphological differences between the three new species of Polystichum and their morphologically related species.
CharactersP. sunhangiiP. attenuatumP. lentumMargins of large scaleentireentiredenticulateLamina dissectiondeeply bipinnatifid to bipinnate bipinnateshallowly or deeply bipinnatifidBulbil on pinnapresent on all mature pinnaeabsent or rarely present on some pinnaeabsent or rarely present on some pinnaeP. wusugongiiP. chingiaeP. hookerianumVenationfreefreeanastomosingDistribution of sori1 row or rarely 2 rows on each side of midrib2 or 3 rows on each side of midrib2 to 3 rows or rarely 1 row on each side of midribNumber of pinnae21–27 pairs10–16 pairs15–20 pairsP. xinfeniaeP. acutidensP. obliquumNumber of pinnae18–30 pairs25–45 pairs7–18 pairsPinna marginsirregularly toothedregularly toothedirregularly toothedSpace of pinnaeclose or overlappedclose or overlappedobviously spaced