生活型

herb

形態特徵

• Perennial or annual herb 0.05-0.2 m tall, erect to decumbent but not rooting at the base, variously branched; stems solitary or ± caespitose, 4-lined, eglandular.
• Leaves sessile; linear, apex obtuse to rounded, base cordate-amplexicaul, chartaceous, sometimes glaucous beneath, with 1-3 basal main veins and sometimes 1 or more lateral veins but no visible reticulate venation, no marginal glands and ± numerous pale laminar glandular dots.
• Inflorescence 1- ca. 5-flowered, monochasial, with axillary branches; flowers 5-8 mm in diam., ± plane, in bud ellipsoid, acute; sepals 2.8-4 mm long, 0.8-1 mm broad, lanceolate, acute, entire, without marginal glands, with laminar pale dots to lines, erect in fruit; petals 4-8 mm long, 2-4 mm broad, obovate to oblanceolate, light yellow to orange, persistent, without glands; stamens ca. 30-40; anthers yellow, with amber gland; ovary 1-locular, the 3 styles 0.5-0.9 times as long (0.7-0.9 mm), free, spreading from base.
• Capsule 2-2.7 mm broad, cylindric to broadly ovoid, not vittate; seeds 0.5 mm long, longitudinally ribbed with fine transverse striae, not carinate, without terminal appendage.
• <i>Hypericum gramineum</i> is known in Taiwan from only the above two records. The description applies only to the Taiwan material, which is similar to the form occurring in New Guinea but smaller, and may have been introduced to Taiwan from there or from China or Vietnam.

分布

• 台灣 : in open, well-drained habitats, lowlands.
• 世界 : Australia, New Zealand, New Caledonia and New Guinea; also in Vietnam, Bhutan, India (Assam), mainland China (Yunnan), Hainan. Introduced into Hawaii.

引證標本

HSINCHU: Senkyakuseki, Shimada 4116; Chutung, Hsu 27.

參考文獻

• ROBSON, NORMAN K. B., Flora of Taiwan, second edition 2: 704. 1996.  (Fl. Taiwan 2nd edit.)