Utricularia caerulea

短梗挖耳草

Utricularia caerulea L.

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

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名彙資訊

學名發表文獻

L., Species Plantarum 1: 18. 1753. (Sp. Pl.)

台灣首次記錄發表文獻

Li, Bulletin of Botanical Research 8(2): 31. 1988. (Bull. Bot. Res., 植物研究)

異名

Calpidisca takenakae Nakai

Nakai, Journal of Japanese Botany 17: 193. 1941. (J. Jpn. Bot., 植物硏究雑誌)
Utricularia racemosa Wall. ex Walp.

Kou, Biol. Bull. Taiwan Normal Univ. 3: 29. fig. 6. 1968. (師大生物學報)

各語言俗名

中

長距耳挖草. 長距挖耳草.
日

ほざきのみみかきぐさ.

參考資料

Yang, A list of plants in Taiwan . 1982. (List Pl. Taiwan, 台灣植物名彙)

特徵描述

生活型

herb

形態特徵

Annual, terrestrial herbs. Rhizoids and stolons capillary, branched.
Leaves numerous, from peduncle base and stolon nodes; 3–20 mm long, 0.5–2 mm wide, glabrous; lamina linear to linear-obovate, membranaceous, 1-nerved, base attenuate to petiole, margins entire, apex rounded. Traps on stolons and leaves, ovoid, 0.25–1 mm long, stalked; mouth lateral, with a dorsal subulate beak, margin and beak with numerous stipitate glands.
Inflorescences erect, 5–44 cm long, 1–15-flowered, glabrous; peduncle terete, 0.3–1.2 mm thick; scales 1–12, similar to bracts; bracts not basifixed, oblanceolate, 1.5–3 mm long, both ends acute; bracteoles not basifixed, ovate-lanceolate, 1–2 mm long; pedicels erect at anthesis, spreading to reflexed in fruit, 0.2–1 mm long, minutely papillose. Calyx lobes unequal, minutely papillose, glabrous; upper lobe ovate-oblong, apex rounded; lower lobe suborbicular, apex retuse. Corolla violet, pink or white, marked with yellow at throat, 4–10 mm long; upper lip oblong or ovate-oblong, apex retuse; lower lip broadly ovate, with a basal, 4-ridged swelling, apex rounded or emarginate; spur narrowly conical, usually longer than lower lip, apex subacute. Filaments straight, 1–2 mm long; anther thecae subdistinct. Ovary globose; style short; lower lip of stigma semicircular, upper lip much smaller, deltoid.
Capsule globose or ellipsoid, 1.5–2 mm long, dehiscing by a short, longitudinal, ventral slit. Seeds obovoid or oblong-ellipsoid, 0.25–0.3 mm long; testa with elongate, reticulate prominences and conical or clavate papillae.

物候

Flowering June to November, fruiting July to December.

分布

台灣 : on wet rocks, streamsides, wet grasslands, swamps and damp places at low to middle elevations.
世界 : Southern and southeastern Asia to Australia.

引證標本

TAIPEI: Chili, Suzuki 20565; Tanshui, Kawakami et al. s. n. 1907. TAOYUAN: Chugli, Sasaki s. n. 1928. HSINCHU: Shanjiao, Peng 9491; Lienhuashih, Peng & Leu 13149; Chupei, Peng et al. 11194.