討論:細葉杜鵑

山羊百科，林文智老師的植物、山岳、攝影紀錄

第一版

1. Shoots with appressed, flattened, brownish bristle-like hairs; leaves dimorphic, the spring and summer leaves different in shape.

2. Stamens 5, sometimes 4 or 6; flowers generally pink.

3. Plants hairy; flowers terminal; fruit long, over 10 mm long.

4. Leaves shorter, 0.4-3 cm long; filaments glabrous or slightly pilose; style glabrous.

5. Leaves much smaller, 4-14 mm long; filaments slightly pilose; anthers not apiculate　17. R. sikayotaizanense

2. Stamens 5-10; flowers red, rarely pink or white.

3. Shoots densely clothed with flattened appressed hairs; bud scales not viscid; corolla funnelform to campanulate.

4. Leaves ovate to obovate or ovate-lanceolate.

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

6. Leaves ovate to obovate-lanceolate, about 1.5 cm or less long.

7. Corolla smaller, about 2 cm long and 2 cm across; stamens slightly exserted　12. R. noriakianum

12.　 Rhododendron noriakianum T. Suzuki　南湖大山杜鵑

A low shrub, many-branched, the branchlets slender, appressed-strigose, soon glabrescent. Leaves chartaceous, mostly crowded at tips of branches, ovate to ovate-oblong, 0.7-1.5 cm long, 4-6 mm broad, the apex obtuse to apiculate, the base acute, the margins entire, the upper surface green, glabrous, the lower surface pale, furfurescent-pubescent along the costa and main veins, the secondary veins about 3-4 per side, inconspicuous; petioles 1-2 mm long, pubescent. Flowers 3-4-umbellate, terminal; pedicels 3-4 mm long, densely furfurescent- pilose; calyx 5-lobed, the lobes acute, densely pilose; corolla red, funnel-shaped, about 1.5 cm long and 2.5 cm across; stamens 7-10, unequal, slightly exserted, the filaments pubescent on the lower part; ovary pubescent, the style glabrous throughout.

Endemic. Northern Taiwan at 2,000-3,000 m in open grasslands with Miscanthus.

ILAN: Nanhutashan, Suzuki, Fukuyama & Simada 17753. HSINCHU: Sikayotaisan, Fukuyama 3005 (Type coll.), 3006.

17. Rhododendron sikayotaizanense Masamune 志佳陽杜鵑

A shrub, the branches densely covered with strigose hairs. Leaves coriaceous, oblong to ovate-oblong, 4-14 mm long, 2-6 mm broad, sparsely appressed- hirsute above, densely pilose along the costa beneath, the apex acute, apiculate at the tip, the base cuneate, the secondary veins 2-4 per side. Flowers 2-3, terminal, the pedicels about 1 cm long, more or less densely pilose; calyx 5- lobed, the lobes linear-lanceolate, about 4 mm long and 1.5 mm broad, the margins long-ciliate; corolla red, campanulate, about 2 cm long and broad, 5-lobed, the lobes oblong, the apex rounded; stamens 4-6, unequal, the filaments sparsely hirsute; ovary densely hirsute, the style glabrous, about 2 cm long.

Endemic.

CENTRAL RANGES: Mt. Sikayotaizan, Moris. N. in 1936 (Type coll.).

Known from the type collection only. It is Very near R. rubropilosum, R. nakaharai and R. noriakianum in general appearance, but with somewhat smaller leaves. These three species, however, have 7-10 instead of 4-6 stamens.

第二版

8. Rhododendron noriakianum 　細葉杜鵑

Low shrubs, many-branched; branchlets slender, hispid. Leaves chartaceous, mostly crowded at tip of branches, elliptic to oblong, 0.7-1.8 cm long, 4-6 mm broad, apex obtuse to apiculate, base acute, margin entire, upper surface green, glabrous, lower surface pale, furfurescent pubescent along midrib and lateral veins, lateral veins 3 or 4 pairs, inconspicuous; petiole 1-2 mm long, pubescent. Flowers 2-4(-5) in umbels, terminal; pedicel 3-4 mm long, densely furfurescent pilose; calyx lobes acute, densely pilose; corolla red to dark purple, funnelform, ca. 1.5 cm long, 2.5 cm across; stamens 7-10, unequal, slightly exserted, filaments pubescent on lower part; ovary pubescent, style glabrous.

Endemic. Northern and central Taiwan, from 1,500 to 2,800 m, in open grasslands with Miscanthus.

HSINCHU: Chihchiayangtashan, N. Fukuyama 3006, (Type of R. noriakianum T. Suzuki, TAI), K. Mori s. n. in 1936 (Type of R. sikayotaizanense Masamune, TAI) . TAICHUNG : Chika, Lu. S. n. in 1981. NANTOU : Pihlushih, Lu. S. n. in 1981.

いさおつつじ.

別稱志佳陽杜鵑、南湖大山杜鵑、北部高山紅花杜鵑。

常綠性灌木。葉橢圓形至長橢圓形，叢生枝梢。莖頂萌發2～5朵紅色至紫紅色花，花冠漏斗形，雄蕊7～10枚，不等長。

細葉杜鵑是台灣原生杜鵑花屬葉片最小的物種，植株平日隱身於芒草叢不易發覺，枝梢密生紅色至紫紅色花朵才會吸引遊客的目光。

• 族群分布：海拔1500～2800m中部以北山區，植株經常群聚於台灣二葉松林下層的芒草叢或是集生於針闊葉混合林緣；新竹、台中及南投均可見情蹤影。
• 最佳賞花地點：武陵國家森林遊樂區、台七甲公路思源至梨山路段邊坡及中橫公路102km附近。
• 最佳賞花時間：每年四月至六月便可探訪處處花叢的美景。