生活型

tree

形態特徵

• Trees to 8 m tall; trunk with stratified bark. Branches dark to reddish brown, glabrous, branchlets greenish to reddish brown, densely ferruginous-velutinous becoming glabrate. Buds elliptic, reddish brown, glabrous, marginal bracts overlapping, with wrin
• Leaf blades ovate to oblong-lanceolate, 7-11(-14) cm long, 2-3.5(-4.5) cm wide, apex acute-acuminate to caudate, base slightly cordate to rounded, with auriculate glands, margins glandular-serrulate, rarely entire; immature leaf blades reddish to pale green, densely sericeous on both surfaces; mature leaf blades ferruginous-velutinous becoming glabrate beneath, greenish on both surfaces, lateral veins 30-50 pairs including those not reaching margins; petioles 5-15(-20) mm long, pubescent or glabrous; stipules reduced gland-like, tawny becoming dark brown, deciduous.
• Aments precocious, 4-9 cm long, peduncles with 3-5 caducous leafy bracts. Flowers of staminate aments whorled; stamens 3-7, filaments pilose near base, 3-3.5 mm long, anthers widely ellipsoid, 0.3-0.5 mm long, 0.4-0.6 mm wide; nectaries 3-5, fused at base, cup-like, largest one adaxial; often with 2-3 lobes, sometimes pilose, others abaxial; bracts ovate to obovate, 2-3 mm long, 1.4-2 mm wide, apex obtuse to rounded, both surfaces pubescent, tip often becoming glabrate abaxially, tawny. Flowers of pistillate aments whorled aments, 3.5-5 cm long, to 10 cm long in fruit; peduncle pilose, to 2 cm long; leafy bracts deciduos, densely villose abaxially; pistils greenish, glabrous, lanceolate-conical, apex obtuse, styles 0.4 mm long, stigma double bifid, stipes glabrous, 0.8 mm long, 1/3 to 1/2 as long as bracts; nectary 1, adaxial, partly surrounding stipe, often lobed; bracts as in staminate flowers; ovules 4 per ovary.
• Capsules ovate-lanceolate. Seeds green, clavate, 1-2 mm long, with coma at base.

分布

• 台灣 : In wetlands and ponds from lowlands to mountainous areas below 1,500 m.

引證標本

TAIPEI: Campus, Kao s. n. 1955; Wufenpo, Masamune 2491. ILAN: Shemihu, Su et al. s. n. 1987; Shuanglienpei, Yang 3293*, 3294*; Tapae, Ying s. n. 1987 (Type of S. warburgii var. eucalyptifolia, NTUF!); Tsaopae, Yang 3325. NANTOU: Sun Moon Lake, Kawakami s. n. 1916 (Type of S. suishaensis Hayata, TAIF!), Sasaki s. n.* 1929. KAOHSIUNG: Chishan, Kawakami & Mori s. n. 22347; Niaosung, Masamune 3407. PINGTUNG: Nanjenshan, Yang 3129, Tungyuan, Yang s.n. 1995. HUALIEN: Shoufong, Hsieh & Tang s. n. 1988.

參考文獻

• YANG, KUOH-CHENG and HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 2: 33. 1996.  (Fl. Taiwan 2nd edit.)