生活型

shrub

形態特徵

• Shrub; branches arching; branchlets 4-lined and flattened when young, soon 2-lined to terete.
• Leaves sessile; lamina 2-6 cm long, 1.1-2.9 cm broad, ovate to elliptic, apex subacute to rounded, base cuneate to rounded, subcoriaceous, paler beneath, with faint submarginal vein, reticulate venation faint or invisible and only pale glandular dots, ± prominent above.
• Inflorescence 1-3-flowered, terminal, sometimes with up to 10 pairs of short axillary 1-flowered branches; flowers 2.5-3.5 cm in diam., shallowly concave, in bud ovoid, obtuse to subacute; sepals 7-10 mm long, 1.5-6 mm broad, lanceolate to elliptic or oblanceolate, acute to subacute, margin entire, erect in fruit; petals 10-20 mm long, 8-12 mm broad, obovate, yellow, with amber gland; ovary 3-5(6) mm long, ovoid to subglobose, 5-locular, the 5 styles 1.2-2.5 times as long, completely united.
• Capsule 8-9 mm long, ca. 6 mm broad, broadly ovoid;Seeds 1-2 mm long, with terminal expansion.
• The long sepals easily distinguish <i>H. formosanum</i> from all other Taiwan species with styles completely united, except <i>H. nakamurae</i>.

分布

• 台灣 : On well-drained banks or stony areas from sea level to ca. 500 m.

引證標本

TAIPEI: Tatunshan, Kao s. n. 1956. KEELUNG: Keelung, Yamamoto s. n. 1929.

參考文獻

• ROBSON, NORMAN K. B. 1996. Flora of Taiwan, second edition 2: 702. (Fl. Taiwan 2nd edit.)