Utricularia gibba

絲葉狸藻

Utricularia gibba 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, Flora of Taiwan, second edition 4: 724. pl. 333. 1998. (Fl. Taiwan 2nd edit., 台灣植物誌第二版)

異名

Utricularia exoleta R. Br.

Masam., Transactions of the Natural History Society of Formosa 30: 413. 1940. (Trans. Nat. Hist. Soc. Formos., 台灣博物學會會報)

各語言俗名

中

疣狸藻. 球狸藻.
日

わすれたぬきも.

參考資料

Yuen-Po Yang, Shen-Horn Yen & Chung-Kang Lin, Illustrated Guide to Aquatic Plants of Taiwan . 2001. (Ill. Guide Aquatic Pl. Taiwan, 台灣水生植物圖誌)
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 or perennial, stranded or floating aquatic herbs. Rhizoids present or absent, filiform, branched. Stolons filiform, much branched and often mat-forming.
Leaves numerous on stolons, 0.5–1.5 cm long, primary segments (1) 2, unbranched or sparsely dichotomously branched into 3–8 ultimate segments; ultimate segments capillary, slightly flattened, margins entire or sparsely denticulate, apex and teeth setulose. Traps lateral on leaf segments, ovoid, 1–2.5 mm long, stalked; mouth lateral, with 2 setiform, branched appendages and shorter setae.
Inflorescence erect, 2–15 cm long, 1–3(–6)-flowered; dorsal, peduncle terete, 0.3–0.5 mm thick, glabrous; scale 1, similar to the bracts; bracts basifixed, semicircular, ca. 1 mm long, minutely glandular, apex truncate or obscurely dentate; bracteoles absent; pedicels erect or spreading, filiform, 2–12 mm long. Calyx lobes subequal, broadly ovate or circular, 1.5–2 mm long, apex rounded. Corolla yellow, 4–8 mm long; upper lip broadly ovate or subcircular, ca. twice as long as upper calyx lobe, apex obscurely 3-lobed; lower lip slightly smaller, base with a prominent, bilobed swelling, apex rounded; palate densely pubescent; spur narrowly conical or cylindrical from a conical base, apex obtuse, shorter or longer than lower lip, distal part sparsely stipitate-glandular. Filaments curved, 1–1.5 mm long; anther thecae confluent. Ovary globose; style distinct; lower lip of stigma transversely elliptic, upper lip obsolete.
Capsule globose, 2–3 mm in diam., bivalvate. Seeds lenticular, 0.8–1 mm in diam., margin broadly winged, wing shallowly and irregularly dentate; testa with small, reticulate prominences.

物候

Flowering April to November, fruiting May to December.

分布

台灣 : in shallow, still and slowly flowing water, and in pools, lakes, bogs, swamps, marshes and rice fields at low to middle elevations.
世界 : Pantropical, extending into southern Canada, Spain, Portugal, Israel, China and Japan and southward to Argentina, southern Africa, Australia and New Zealand.

引證標本

TAIPEI: Chili, Yoshida 5; Musha, Chuang 3088; Neihu, Nakamura 4066; Nankang, Peng 9760; Peitou, Simada s. n. 1914. TAOYUAN: Yangmei, Peng 11123; Patei, Chuang 4611; Tachuwei, Sasaki s. n. 1909. HSINCHU: Chingtsaohu, Kuo s. n. 1966. NANTOU: Puli, Kawakami s. n. 1910. PINGTUNG: Nanjenshan, Koyama & Kao 8919.