討論:紅星杜鵑

山羊百科，林文智老師的植物、山岳、攝影紀錄

4.Rhododendron hyperythrum Hayata　小西氏杜鵑

A small tree or shrub; branches stout; branchlets glabrous. Leaves thickly coriaceous, oblong to lanceolate, 8-10 cm long, 2.5-3 cm broad, the apex acute, apiculate at the tip, the base rounded to obtuse, the margins entire, strongly recurved, the upper surface dark, glabrous, slightly lustrous, the lower pale, dotted with minute rufous punctate glands, the costa strongly raised beneath, the secondary veins about 8-10 per side, inconspicuous; petioles 1.5-2 cm long, stout, glabrous. Flowers 3 or more, umbelled, terminal; pedicels 4-5 cm long, glandular; calyx 5-lobed, the lobes triangular, glandular; corolla white, funnelform, about 4.5 cm across, 5-lobed, the lobes rounded; stamens 10, unequal, shorter than the corolla; ovary glandular; style exserted, glandular at base. Capsules cylindric, about 2 cm long, pubescent.

Endemic. Very local in distribution, limited to the mountains north of Taipei and around Mt. Yushan.

TAIPEI: Sasaki s. n. in 1910 (Type of R. rubropunctatum Hayata), 327. CENTRAL RANGES: Konishi s. n. (Type of R. hyperythrum Hayata). CHIAYI: Mt. Yushan, Kawakami s. n. in 1907.

This species is unique in the lepidote leaves with small punctations.

4. Rhododendron hyperythrum Hayata　南湖杜鵑

Small trees or shrubs; branches stout; branchlets glabrous. Leaves thick coriaceous, oblong to lanceolate, 8-10 cm long, 2.5-3 cm broad, apex acute, apiculate, base rounded to obtuse, margin entire, strongly recurved, upper surface dark, glabrous, slightly lustrous, lower surface pale, dotted with minute rufous punctate glands, midrib strongly raised on lower surface, lateral veins 8-10 pairs, inconspicuous; petiole 1.5-2 cm long, stout, glabrous. Flowers 3 or more in terminal umbels; pedicel 4-5 cm long, glandular; calyx lobes triangular, glandular; corolla white, funnelform, ca. 4.5 cm across, 5-lobed, lobes rounded; stamens 10, unequal, shorter than corolla; ovary glandular, style exserted, glandular at base. Capsules cylindric, ca. 2 cm long, pubescent. Endemic, limited to the northern mountains of the central range.

Central Range: Konishi, s.n. (Type of R. hyperythrum Hayata).

TAICHUNG: Nanhutashan, Lu 23457. HUALIEN: Chingshuishan, Lu 14509.