討論:台灣高山杜鵑

山羊百科，林文智老師的植物、山岳、攝影紀錄

• Rhododendron taiwanalpinum Ohwi　 ヒメキンモウツツジ　標準 http://ylist.info/ylist_simple_search.php?any_field=%E3%83%92%E3%83%A1%E3%82%AD%E3%83%B3%E3%83%A2%E3%82%A6%E3%83%84%E3%83%84%E3%82%B8&capital=0&family_order=2&family_disp_type=1&family_header=0&spec_order=0&list_type=0&search=%E6%A4%9C%E7%B4%A2

第一版

4. Leaves ovate to obovate or ovate-lanceolate.

5. Styles villous at base; corolla pink; leaves ovate to ovate-lanceolate ……………………………………………….16. R. rubropilosum

5. Styles glabrous; corolla red, rarely white or pink; leaves ovate to elliptic or obovate-lanceolate.

6. Leaves elliptic-oblong or oblong-obovate, 2-5 cm long.

7. Leaves chartaceous, strigose beneath, the margins flat; corolla red . . 18. R. simsii

7. Leaves subcoriaceous, densely strigose beneath, the margins revolute; corolla pink………………………………………19. R. taiwanalpinum

19. Rhododendron taiwanalpinum Ohwi　台灣高山杜鵑

A shrub 1-1.5 m high; branches ascending, the young branchlets slender. Leaves subcoriaceous, ovate-oblong to oblong-lanceolate, 1.5-2 cm long, 0.7- 1.2 cm broad, the apex acute, often mucronulate at tip, the base acute, the margins entire, distinctly revolute sparingly strigose above, densely so beneath, the secondary veins 5-6 per side, subconspicuous; petioles 2-3 mm long, appressed- strigose. Rowers 2-3, terminal; corolla wide-funnelform, pink, spotted with rose 1-1.5 cm long, 1.5-2 cm across, the lobes spreading; stamens 9-10, unequal, the filaments villouson the lower half; ovary grayish pubescent, the style pubescent below.

Endemic. Northern Taiwan, on mountain peaks and in alpine meadows at 2,800-3,000 m.

ILAN: Nanhutashan, Ohwi 2580 (Type coll.).

第二版

13. Leaves thin chartaceous, ovate to elliptic, densely hispid; stamens 10.

14. Leaf margins revolute, sparsely hispid .......... 12a. R. rubropilosum var. rubropilosum

14. Leaf margins not revolute, densely hispid.......12b. R. rubropilosum var. taiwanalpinum 12b. Var. taiwanalpinum (Ohwi) Lu, Yang & Tseng, comb. & stat. Nov. 臺灣高山杜鵑

Rhododendron taiwanalpinum Ohwi, J. Jap. Bot. 13: 339. 1937.

Shrubs 1-1.5 m tall; branches ascending, young branchlets slender. Leaves subcoriaceous, ovate-oblong to oblong-lanceolate, 1.5-2 cm long, 0.7-1.2 cm broad, apex acute, often mucronulate, base acute, margin entire, distinctly revolute, sparsely strigose on upper surface, densely so on lower surface, lateral veins 5 or 6 pairs, inconspicuous; petiole 2-3 mm long, appressed strigose. Flowers 2 or 3, terminal; corolla broadly funnelform, pink, spotted with rose, 1-1.5 cm long, 1.5-2 cm across, lobes spreading; stamens 9 or 10, unequal, filaments villous on lower half; ovary grayish pubescent, style pubescent at base.

Endemic. Northern Taiwan, on mountain peaks and in alpine meadows, 2,800-3,000 m.

　　常綠性灌木。葉卵狀長橢圓形至長橢圓狀披針形，葉緣明顯反捲，互生或叢生枝梢。莖頂萌發2～3朵淡紫紅色花，花冠漏斗形，具玫瑰色斑點，5裂，裂片長橢圓形，雄蕊9或10枚，叢生。

　　台灣特有變種，是紅毛杜鵑的變種，兩者花期幾乎一致，植株外觀極為近似，前者葉緣明顯反捲且葉背密披粗毛，後者葉緣略反捲且葉背疏被粗毛。　　

• 族群分布：海拔2200～3000m之北部山區，台北、桃園、新竹、苗栗、南投及花蓮等縣山區均有分布。

• 最佳賞花地點：植株集生於針闊葉混合林緣與玉山箭竹草坡；台14甲24km的鳶峰路段與38km的合歡北峰登山口一帶，是最最容易近距離觀察及拍攝的地點。

• 最佳賞花時間：四至六月。