中国云南象牙参属(姜科)一新种——苍山象牙参

Roscoea cangshanensis M.H.Luo,X.F.Gao & H.H.Lin,a new species of Zingiberaceae from Yunnan,China

描述了中国云南姜科Zingiberaceae一新种——苍山象牙参Roscoea cangshanensis M.H.Luo,X.F.Gao & H.H.Lin。该种与大理象牙参R.forrestii Cowley在体态上相近,但唇瓣深裂成2裂片,每个裂片再2裂,基部收缩成具白色条纹的柄,叶片较狭窄,(2–)7–24×1.5–2.5cm,叶片基部狭缩成叶柄状而不同。该新种叶片基部狭缩成叶柄状,唇瓣倒卵状楔形,长2.5–3.5cm,宽2.5–3.0cm,基部收缩成具白色条纹的柄,与长柄象牙参R.debilis Gagnep.相似,但苞片非管状,较短,长5–15mm,隐藏于叶鞘内,花冠管较长,10–12.5cm,唇瓣深裂成2裂片,每个裂片再2裂,可与后者明显区别。

Roscoea cangshanensis M. H. Luo, X. F. Gao ＆ H. H. Lin, a new species of the Zingiberaceae from Yunnan, China, is described and illustrated. The new species is related to R. forrestii Cowley in habit, but differs in having 2-lobed labellum, each lobe 2-1obulate, base narrowed to a stalk with white lines, and narrower leaf blade, （2-）7-24× 1.5-2.5 cm, with base narrow to petiole-like. The new species is also similar to R. debilis Gagnep. in having leaf base narrow to petiole-like, labellum obovate-cuneate, 2.5-3.5 × 2.5-3.0 cm, with white lines at throat, but differs in having bracts non-tubular, shorter, 5-15 mm long, concealed in leaf sheaths, corolla tubes longer, 10-12.5 cm long, labellum 2-lobed with each lobe further 2-1obulate.