齒葉南芥
| 齒葉南芥 |
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中文學名:齒葉南芥 拉丁學名:Arabis serrata 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:五椏果亞綱 目:白花菜目 科:十字花科 族:南芥族 屬:南芥屬 種:齒葉南芥 |
齒葉南芥，Arabis serrata，多年生草本，高10-30厘米，全株被較少緊貼的單毛及較多的2叉毛。主根粗壯，黑褐色。 [1]
目錄
齒葉南芥形態特徵
莖自基部叢生，有匍匐枝。基生葉倒卵形至長橢圓形，長1-5厘米，寬5-10毫米， 齒葉南芥頂端鈍圓或急尖，邊緣全緣或有鋸齒，有時基部兩側具3對小裂片；葉柄長1-2厘米；莖生葉長橢圓形至披針形，長2-4厘米，寬3-10毫米，基部呈耳狀，抱莖。
總狀花序頂生或腋生，有花10餘朵；萼片卵形至長橢圓形，長約4毫米，背面被單毛；花瓣白色，倒卵形，長5-7毫米，基部呈爪狀；花柱與子房長約7毫米，柱頭頭狀。
長角果外展，常反卷或彎曲，長2-6厘米，寬約1毫米，中脈不明顯，宿存花柱長約1毫米；未見成熟種子。花、果期5-8月。
Arabis alpina Linnaeus var. formosana Masamune ex S. F. Huang; A. amplexicaulis Edgeworth var. japonica H. Boissieu; A. amplexicaulis var. serrata (Franchet & Savatier) Makino; A. boissieuana Nakai; A. boissieuana var. glauca (H. Boissieu) Koidzumi; A. boissieuana var. sikokiana Nakai; A. fauriei H. Boissieu (1899), not H. Léveillé (1910); A. fauriei var. grandiflora Nakai; A. formosana (Masamune ex S. F. Huang) T. S. Liu & S. S. Ying; A. glauca H. Boissieu; A. glauca subsp. pseudoauriculata (H. Boissieu) Voroschilov; A. hallaisanensis Nakai; A. iwatensis Makino; A. kishidae Nakai; A. pseudoauriculata H. Boissieu; A. serrata var. glabrescens Ohwi; A. serrata var. glauca (H. Boissieu) Ohwi; A. serrata var. platycarpa Ohwi; A. serrata var. japonica (H. Boissieu) Ohwi; A. serrata var. sikokiana (Nakai) Ohwi; A. sikokiana (Nakai) Honda.
Herbs perennial, (5-)12-35(-45) cm tall, densely to sparsely pilose, with minute, short-stalked or subsessile, submalpighiaceous and 3-5-rayed, stellate trichomes, rarely glabrescent or with some simple ones near stem base. Stems erect, single or few from base. Basal leaves rosulate; petiole (0.5-)1-4(-6) cm; leaf blade spatulate, oblanceolate, obovate, or narrowly oblong, (1-)2-7(-14) × (0.5-)1-2(-3) cm, base cuneate or attenuate, margin entire, dentate, or rarely lyrate-sinuate, apex obtuse or rounded. Middle cauline leaves sessile, oblong or ovate, (1-)2-4(-6) × 0.5-2.5(-3.5) cm, base cordate or amplexicaul, margin dentate or entire. Racemes ebracteate. Fruiting pedicels ascending or divaricate, (0.5-)0.8-2(-2.5) cm, slender, straight, often glabrous. Sepals oblong, 3.2-4 × 1.2-1.8 mm, glabrous, lateral pair saccate. Petals white, rarely pinkish, oblong-oblanceolate, 7-10 × (1.5-)2-3(-3.5) mm, apex truncate-emarginate. Filaments 4-5 mm; anthers oblong, 1-1.4 mm. Ovules 28-60 per ovary. Fruit (2-)3.5-7(-8) cm × 1-1.5 mm, erect, divaricate, or rarely reflexed; valves with an obscure or distinct midvein, torulose, glabrous; style 1-2.5 mm. Seeds brown, oblong or rarely suborbicular, (1-)1.5-2(-2.5) × 0.8-1 mm, uniseriate, broadly winged apically; wing 0.3-0.6 mm wide. Fl. Apr-Jun, fr. May-Aug. 2n = 32.
Rocky crevices, along streams, mountain slopes, deciduous forest; 100-3200 m. Anhui, Taiwan [Japan, Korea].
Arabis serrata is highly variable in basal leaf indumentum, margin, and petiole length. Of the many taxa synonymized above, none seems to merit recognition. In fact, A. formosana is indistinguishable from some of the Japanese forms of A. serrata.
齒葉南芥生長環境
生長在海拔1600米的石縫中。