Nasturtium officinale R Br

[From nasus tortus = twisted nose and officinale = used in medicine]

Synonymy: Nasturtium fontanum Aschers.

Common names: Water-cress; cresson aquatique (French); nasturzio (Italian); agriao (Portuguese); berro (Spanish).

Fig. 128. Nasturtium officinale R. Br. From: KLU Herbarium 35336. Plants of Connecticut. Geographical localization: Collier Road, Hartford Co., Wethersfield. Field collector & botanical identification: Steven R Hill, 28 May 1981.

Physical description: It is a herb about 50 cm tall which grows mainly in the watery pastures of Europe and the temperate parts of Asia. The stems are succulent and glabrous. Leaves: spiral, without stipules, 4cm-8cm long and pinnately lobed. The petiole is sheathing at the base. It is channeled, the channel filled with hairs. The blade shows 4-5 pairs of opposite or sub-opposite lobes of 4 mm-1 cm in diameter and a terminal lobe which is obscurely 5-lobed. Each lobe shows 2-3 pairs of nerves, which are flat above and raised below. The inflorescences are terminal or axillary corymbs of very small flowers which com prise 4 sepals and 4 white petals (Fig. 128).

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