討論:楊桐屬

山羊百科，林文智老師的植物、山岳、攝影紀錄

1. Adinandra formosana Hayata in Matsum. & Hayata

1b. var. obtusissima (Hayata) Keng in Taiwania 1: 245. 1950; Li in Fl. Taiwan 2: 595. 1976. 鈍葉楊桐

Branches and branchlets grayish brown, terete. Leaves elliptic, 4-8 cm long, 2-3.5 cm wide, obtuse or shortly acute at apex, cuneate or acute at base, margins sub-entire or slightly serrate near the apex, revolute, midrib sulcate above, prominent below, veins elevated on both surfaces; petiole 5-7 mm long.Fruit axillary, solitary; globose, 10-12 mm in diameter, sericeous-pubescent, 3-celled; style persistent, densely pubescent.

Endemic, known only from the southern part.

PINGTUNG: Shouka to Chushuipo, Liu & Keng K2816; Nanjenshan, Huang 9521.

1a. var. formosana. 臺灣楊桐 Pl.317, Photo 292

Small trees, branches terete, pilose, glabrescent with age. Leaves coriaceous, ovate-oblong, 5-9 cm long, 2-3.5 cm wide, the apex acute or acuminate, cuneate at base, grayish yellow and glabrescent beneath, margins distinctly serrate in upper half; petiole 4-7 mm long. Flowers axillary, solitary, pedicels 2-3.5 cm long, slender, slightly pubescent; bracteoles 2, ovate-lanceolate; sepals 5, imbricate, subequal, ovate-deltoid, glabescent or slightly appressed-pubescent without, margins both denticulate and ciliate, 7-8 mm long, 4-6 mm wide; petals 5, imbricate, similar to the sepals in size and shape, connate at base; stamens 20-25, filament 3 mm long, glabrous, adnate to the base of the corolla, anthers 2-3 mm long, broadly linear, densely villous, apicules 1-1.5 mm long; ovary nearly globose, pilose, 3-celled, style 9 mm long, hairy or glabrescent. Fruit glabrescent, subglobose, 7-8 mm in diameter, many-seeded, seeds minute, black and shining.

Endemic. Throughout the island, at low and medium altitudes (200- 1,900 m).

TAIPEI: Chutzuhu, Iwami 522; Hsintien, Yamamoto s. n. 1929. TAOYUAN: Palin, Chiang s. n. 1990. MIAOLI: Compartment 133, Kuo & Kao 460. NANTOU: Lienhuachih, Kao 4072. PINGTUNG: Tashulinshan, Shimizu 3719; Nanjenshan, Huang 9521. TAITUNG: Chinshuiying, Shimizu 3785.

2. Adinandra lasiostyla Hayata 毛柱楊桐

Trees; branches terete, brown to grayish brown; branchlets and terminal buds twany-pubescent. Leaves coriaceous, oblong-elliptic, 8-13 cm long, 2-5 cm wide, shining and glabrous above, pubescent beneath, apex acuminate, base acute, the margins entire or crenulate; petiole 3-5 mm long. Flowers axillary, solitary; pedicels pubescent, 5 mm long; bracteoles 2, caducous; sepals 5, rounded, 6 mm long, 5 mm wide, pubescent; petals 5-6 mm long, 5 mm wide, pubescent along the medium portion of the exterior surface; stamens 20-25, uniform in size, 5-5.5 mm long, filaments glabrous, 1.5-2 mm long, free from each other but adnate to the corolla, anthers 2.5 mm long, apicules 1-1.5 mm long, densely villous; ovary subglobose, pubescent; style entire, up to 10 mm long, sparingly pubescent in lower half, stigma obtuse. Fruit globose, 5 mm in diameter, villous, many-seeded.

Endemic, in the central and southern parts of the island at altitudes of 2,200-2,500 m.

TAICHUNG: Anmashan, Liu et al. 254. CHIAYI: Alishan, Sasaki 1961. KAOHSIUNG: Chienching, Yamamoto & Mori YM631. TAITUNG: Ramaramani, Cheng & Kao 6051.