Oenothera stricta

待宵草

naturalized

Oenothera stricta Ledeb. ex Link

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

Ledeb. ex Link. 1821. Enumeratio Plantarum Horti Regii Berolinensis Altera 1: 377. (Enum. Hort. Berol. Alt.)

herb

Annual or biennial herb with basal rosette, stems erect or rarely decumbent, 25–150 cm tall, unbranched or nearly so; pubescence strigillose, often villous and also with glandular hairs.
Cauline leaves very narrowly elliptic to lanceolate, 2–10 cm long, flat or slightly undulate, serrate.
Flowers few in upper axils; floral tube 20–45 mm, straight in young buds; sepals 14–20 mm, with distinct tips 1–3 mm; petals 15–25(–35) mm, yellow, often with red spot at base, fading reddish orange; anthers 7–11 mm long; pollen ca. 50% fertile; stigma surrounded by anthers at anthesis or slightly elevated above them.
Capsule cylindrical, slightly wider towards apex, 30–40 mm long 3–4 mm wide. Seeds in 2 rows per locule, ellipsoid, 1.3–1.8 mm, short-beaked.
2n = 14.

Flowers May-Sep; fruit Jun-Oct.

台灣 : Known from only one locality at 1,900 m in Taiwan (Ilan Co.). Plants in Taiwan are referred to subsp. stricta, which is characterized by usually sharply serrate leaves and spreading, sparsely villous floral bracts. This is an autogamous, permanent translo
世界 : Native to Chile and Argentina, S America; now naturalized on all continents except Antarctica;