红背漆,福建漆树科一新种

Toxicodendron purpureum,A New Species of Anacardiaceae from Fujian

描述了福建省中北部山区漆树科(Anacardiaceae)漆树属(Toxicodendron)一新种:红背漆(Toxicodendron purpureum),该种与小漆树(T. delavayi)相近,与小漆树不同之处在于叶长达25 cm (vs长达13 cm);小叶叶背紫红色,稀绿色,小叶柄长2~5 mm (vs叶背被白粉,小叶柄长1~2 mm);花序长不超过叶长1/3 (vs与叶近等长);花瓣不具暗褐色脉纹(vs具暗褐色脉纹)。通过比较4相近种的形态学特征以及基于29物种的核基因片段ITS和2个质体基因片段(trn L-F和ndh F)构建的系统发育关系均支持该新种的成立。

Toxicodendron purpureum,a new species of Anacardiaceae from Shaowu County,Fujian Province of Eastern China,is described and illustrated here.The new species is similar to T.delavayi,but is distinguished from T.delavayi by leaves 25 cm(vs to 13 cm);leaflets papery,abaxially purplish red,rare green(vs abaxially glaucous,leaflet petiolule 1–2 mm);inflorescence as long as 1/3 pinnately compound leaf(vs as long as pinnately compound leaf);petals without brown featherlike venation pattern(vs petals with brown featherlike venation pattern).The comparison of morphological characteristics among four closely related species and phylogenetic analyses based on nuclear ITS and plastid sequences(trnL-F and ndhF)from 29 species both support the establishment of the new species.