生活型

herb

形態特徵

• Large perennial herbs; stems terete, erect, to 150 cm tall, base woody, robust, densely covered with retrorse hairs; upper branches opposite, spreading.
• Leaves simple, undivided, opposite, thin, lower leaves broadly elliptic, 14–23 cm long, 4.5–8 cm wide, long-petiolate, acuminate or acute at apex, attenuate at base, margins serrate, pubescent on both surfaces and on margins; lower leaves deciduous at anthesis; upper leaves gradually smaller, elliptic, 4–9 cm long, short petiolate or sessile, margins serrate, pubescent on both surfaces and on margins.
• Inflorescences terminal and axillary, duplicate-corymbose, densely pubescent; bracts narrowly lanceolate or elliptic, 2–5 cm long, 2 mm wide, pubescent; calyx minutely 5-lobed; corolla yellow, funnel-shaped, 3 mm long, segments spreading; stamens usually 2 (rarely 3), inserted at base of corolla tube, filaments linear, ca. 3 mm long, sparsely hairy; style linear 3 mm long, stigma capitate.
• Achenes ovoid, 3–4 mm long, winged, wings nearly orbicular, 6.5 mm across, with nerves distinctly anastomosing.
• This species is similar to <i>P. villosa</i>, but differs by having simple leaves, which are not deeply pinnately divided. First year plants are nearly stemless and the leaves are all basal, long- petioled, broadly elliptic, winged nearly to base of petiole, with margins nearly crenate or slightly serrate at apex and pubescent throughout. These leaves are 14–24 cm long, 5–8 cm wide, much larger than the cauline leaves produced in the following season.

分布

• 台灣 : in northern and central parts at low to medium altitudes.
• 世界 : Distributed in Taiwan and rarely in Japan.

引證標本

TAIPEI: Keelung, Suzuki 4494; Shiting, Kao 4959; Kankou, Kao 7924*. ILAN: Mohen, Suzuki 6109. TAOYUAN: Chaopanshan, Mori s. n. Mar. 24, 1923.TAICHUNG: Pahsienshan, Suzuki s. n. Oct. 21, 1929. NANTOU: Wushe, Sasaki s. n. Oct. 12, 1930.

引用文獻

• KAO, Muh-Tsung & DEVOL, Charles E., Flora of Taiwan, second edition 4: 760. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)