討論:曲莖馬藍

山羊百科,林文智老師的植物、山岳、攝影紀錄

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曲茎兰嵌马蓝   Strobilanthes flexicaulis Hayata, Icon. Pl. Formosan. 5: 135. 1915.

Subshrubs to 1 m tall, much branched, anisophyllous. Stems 4-angled, winged, glabrous. Petiole 0.2-2.5 cm, glabrous or sparsely pubescent; leaf blade ovate, ovate-lanceolate, or ovate-elliptic, 3.5-18 × 1.8-5 cm, abaxially glaucous, adaxially sparsely pilose to subglabrous, secondary veins 4-6 on each side of midvein, base narrowly cuneate and decurrent onto petiole, margin serrate to crenate, apex acuminate. Inflorescences axillary or terminal, spikes, ca. 3 cm, few flowered; rachis often zigzag, glabrous to gland-tipped pilose; bracts persistent, basally merging into leaves, ovate to suborbicular, and shortly petiolate, apically becoming ovate to oblanceolate and sessile, 4-15 × 2-10 mm, apically diminishing in size, glabrous, apex obtuse; bracteoles linear, ca. 4 × 0.5 mm at anthesis but accrescent to ca. 14 × 1 mm, glabrous or sparsely gland-tipped pilose. Pedicel to 1 mm or flowers sessile. Calyx 0.9-1.1 cm at anthesis, strongly accrescent to ca. 3.2 cm in fruit, 2-lipped; lower lip 2-lobed almost to base, lobes linear; upper lip 3-lobed to middle, lobes linear, ca. 6 × 1 mm at anthesis, margin ciliate with gland-tipped trichomes but soon glabrescent, and apex obtuse. Corolla blue to purple, campanulate, ca. 4 cm, outside glabrous or glabrescent, inside glabrous except for trichomes retaining style; tube basally cylindric and ca. 4 mm wide for ca. 1.5 cm then gradually widened to ca. 1.5 cm at mouth; limb slightly 2-lipped; lower lip ca. 1 cm, 3-lobed, center lobe orbicular, ca. 6 × 7 mm, base contracted, and apex emarginate, lateral lobes orbicular, somewhat oblique, and apex emarginate; upper lip 2-lobed, lobes semiorbicular and ca. 5 × 8 mm. Stamens 4; shorter filament pair ca. 2 mm, glabrous; longer filament pair ca. 7 mm, hirsute; anther thecae oblong-linear, ca. 3.5 × 1 mm; pollen type 3. Ovary obovoid, glabrous; style filiform, ca. 3 cm, pubescent with gland-tipped trichomes; stigma subulate. Capsule linear-oblong, 1.6-2 cm, glabrous, 4-seeded. Seeds oblong-ovate in outline, ca. 3.5 × 2 mm, densely covered with appressed trichomes. Fl. Sep-Nov, fr. Feb. 2n = 30.

亚灌木状草本,高达1米,光滑无毛,多分枝。茎具棱,曲折。叶不等大,营养枝上叶具长柄,矩圆状卵形,长达18厘米,宽5厘米,顶端渐尖,边缘具疏锯齿,上面中肋和侧脉凸起,下面稍凸起,侧脉每边4-5条,弓形,被平卧微柔毛或近光滑无毛,暗棕色,下面苍白色,膜质;花枝上叶较小,无柄或近无柄,卵形至近圆形至肾形,基部心形。穗状花序密集,花无梗,苞片小而钝;小苞片2,线形,长8毫米,宽1毫米,几光滑无毛,1条中肋,基部与花萼相连,常被腺状柔毛;花萼圆柱状钟形,3深裂,上方2深裂,裂片线形,长达1厘米,顶端钝,外面散生腺毛-纤毛,后光滑无毛;下方通常3裂至中部,裂片线形,长6毫米,宽1毫米,顶端钝;花冠蓝或紫色,管状钟形,约长4厘米,顶部宽1.5厘米,冠管外面光滑无毛,里面具刚毛,冠管长1.5毫米,宽4毫米,向上逐渐扩大成钟形,上部近2唇形,上唇长4毫米,2裂,裂片半圆形长5毫米,宽8毫米,下唇长1厘米,宽与上唇同,3裂,中央裂片圆,长6毫米,宽7毫米,基部收缩,两侧裂片与中央不等,多少斜,冠檐裂片圆形,顶端微凹;雄蕊4,2强,长花丝约长7毫米,向下有刚毛,短花丝约长2毫米,光滑无毛;花药线状矩圆形,长3.5毫米,宽1毫米,顶端钝,基部2裂。花盘圆柱形,光滑无毛。子房倒卵形,花柱丝状,被短硬毛。柱头近钻形渐尖。蒴果线状圆柱形,约长2厘米;种子长圆状卵形,压扁,贴生微柔毛。
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