討論:玉山杜鵑

山羊百科，林文智老師的植物、山岳、攝影紀錄

15. Rhododendron pseudochrysanthum Hayata 玉山杜鵑 　　ニヒタカシヤクナゲ

Bush, 0.3-3 m tall, many-branched, the shoots relatively stout, clothed with gray or rufous-floccose tomentum, glabrescent. Leaves crowded, very numerous, coriaceous, elliptic-oblong to oblanceolate-oblong or lanceolate, 2-8 cm long, 1.5-3.5 cm broad, the apex subacute, apiculate, the base abruptly rounded, rarely narrowed; young leaves densely rufous or gray floccose-tomentose, soon glabrescent, the costa impressed above, prominent beneath, the secondary veins impressed above; petiole stout, flattened, 0.5-1 cm long, floccose or glabrous. Flowers 10-20, crowded in umbellate corymbs; rachis 1-2 cm long; pedicels 1.5-3 cm long, glandular and rufous-pubescent; calyx minute, 5-toothed, the teeth small, triangular or rounded, glandular, ciliolate; corolla white; broad- campanulate, 5-lobed, 3-4 cm long and broad; stamens 10, included, the filaments flattened and villous at base; ovary rufous glandular-pubescent; style glabrous. Capsules short-cylindric, 1-1.5 cm long, 0.5 cm broad, furrowed, glandular, crowned with remains of the style.

Endemic. On high peaks of the central range at about 3,000-3,900 m, forming dense thickets.

ILAN: Taipingshan, Ito s. n. in 1915; Nanhutashan, Sasaki 57 (Type of R. nankotai- sanense Hayata), s. n. 1929. NANTOU: Wilson 10076, Kanehira & Sasaki 332. CHIAYI: Mt. Yushan, Wilson 10925, Kawakami & Moris, n. in 1906 (Syntype of R. pseudochrysanthum Hayata).

麻花杜鹃亚组 Subsect Maculifera Sleumer

63.阿里山杜鵑 　Rhododendron pseudochrysanthum Hayata

矮小灌木，高0.5—3米;小枝薄被灰色叢卷毛，中間有散生的腺毛，老枝無毛，呈灰褐色。冬芽長圓形，長1.3釐米，直徑5—6毫米，被灰色叢卷毛；葉硬革質，常4—5枚集生枝頂，長圓狀披針形或卵形至橢圓形，長4—8釐米，寬1.5—3.5釐米，先端突尖或漸尖，有時呈尖尾狀，基部圓形或寬楔形，邊緣反卷，上面深綠色，幼時被灰色叢卷毛及腺毛，後變為無毛，下面淡綠色，被叢卷毛，成長後無毛，中脈在上面下凹，下面隆起，多少有毛被和腺體殘跡，側脈15對，在上面微下凹，下面不明顯;葉柄長1—2釐米，密被灰色叢卷毛及長柄腺體。頂生總狀傘形花序，有花5—l 0朵;總軸長1—2釐米;花梗長2—2.5釐米，疏生有柄腺體;花萼小，長1—2毫米，裂齒5，近於三角形，邊緣有流蘇狀腺毛;花冠鐘形，長3—4釐米，直徑4.5釐米，淡紅色，外面有深紅色條紋，內面基部有紅色斑點，裂片5，長1.5—2釐米，寬2.5釐米;雄蕊10，不等長，長1. 5—2.5釐米，花絲白色，基部有微柔毛;子房圓錐形，長5毫米，密被腺體，花柱長3釐米，白色，無毛或下部有腺體，柱頭小，深紅色，有淺裂片。蒴果長圓形，長1—1.5釐米，直徑4—7毫米，5室，有肋紋及腺體殘跡。花期不明，果期7月。

產我國臺灣阿里山及大巴千山等地。生於海拔3 000—3 200米的森林中。模式標本采自臺灣阿里山。

葉は披針形乃至長橢圓形,長き10cm内外,葉柄は長さ1.5〜2.5cm

花梗，萼及び子房は平滑.ュシヤクナゲ(R. nankotaizanensis)

花梗,萼及び子房に腺モあリ シャクナゲ (R. Morii)

葉は橢圓形,長き6cm内外,葉柄は表き0.5~1.5cm ニヒタカシヤクナゲ (R. peudochrysanthum)

葉は膜狀革質,花は紅色，常綠闊葉樹林中に產す品。

葉は長さ7〜12cm

葉は長さ10〜12cm,萼に櫛歯狀緣毛おり(阿里山產) アリサンシセクナゲ Rhododendron tanakai Hayata

葉は長き7〜10cm,萼緣は歯狀ならず(全島産) .....セイシクワ(R.leiopodtm)