巨柱唇柱苣苔

Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 0.5-3 cm X 1-3 mm; leaf blade elliptic to narrowly ovate or narrowly obovate, 2.5-5(-7) X 1-2 cm, papery, adaxially densely puberulent and villous, eglandular, abaxially grayish velutinous to densely pubescent, base cuneate to broadly cuneate, margin entire, apex acute to rounded; lateral veins ca. 3 on each side of midrib, inconspicuous. Cymes 1-3-flowered; peduncle ca. 6 cm, densely pubescent to villous; bracts 2, free, triangular-linear, ca. 2 X 0.3 mm, pilose, margin entire, apex obtuse. Pedicel ca. 5 mm, densely spreading pilose. Calyx 5-sect from base; segments equal, lanceolate-linear, 4-5 X 0.8-1 mm, outside densely pilose, inside above sparsely pubescent, margin entire, apex acute. Corolla white, ca. 2.3 cm, outside sparsely puberulent, inside glandular puberulent near mouth; tube narrowly funnelform, 1.5-1.8 X ca. 0.5 cm; adaxial lip ca. 4 mm; abaxial lip 8-9 mm. Filaments ca. 6.5 mm, pilose basally, pubescent above; anthers fused by entire adaxial surfaces, ca. 3.2 mm, abaxially pilose; staminodes absent. Pistil ca. 1.5 cm, puberulent; ovary ca. 5.5 mm. Stigma narrowly oblong, ca. 1 mm, undivided. Capsule erect, ca. 5 cm. Fl. Oct.* Rocks in shaded hilly regions. N Guangdong (Lian Xian).

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葉約8，基生，葉片厚紙質，長橢圓形，長2.5-5（-7）cm，寬1-2cm，先端微尖，基部漸狹，邊緣近全緣，上面密被短柔毛並散生少數長柔毛，下面密被灰白色短絨毛，側脈每側約3，不明顯；葉柄長2-3cm。花序1回分枝，每花序1-3花；花序梗長達6cm，密被短柔毛；苞片對生，線形，長約2mm，密被短柔毛；花梗長約0.5cm，花萼長4-5mm，5裂達基部，裂片披針狀線形，外面密被柔毛。花冠白色，長約2.2cm，外面密被短柔毛；筒長1.3-1.8cm，口部直徑約5mm，上唇長約4mm，下唇長約9mm，裂片長圓形或長圓狀倒卵形，先端圓形。雄蕊2，花絲長約6.5mm，基部被柔毛，向上被短柔毛；花葯以整個腹面連着，長約3.2mm，背面被柔毛；退化雄蕊缺失；雌蕊長約1.5cm，被微柔毛；子房線形，長約5.5mm，與花柱均密被短柔毛。柱頭狹長圓形，長約1mm，不分裂。

生長於低山陰處石上。

分佈於廣東連州。

保護級別：列入《世界自然保護聯盟瀕危物種紅色名錄》（IUCN）——近危（NT）。 ^[2]