Tropaeolum majus L.
garden nasturtium
Glabrous aromatic annual or short-lived perennial with long trailing or scrambling, succulent stems, sometimes climbing to 2 m high. Lvs simple, peltate. Petioles to c. 30 cm long, usually not coiling. Lamina to c. 18-(21) cm diam., suborbicular, often slightly asymmetric, entire but often sinuate, glaucescent beneath. Fls usually solitary, sometimes in clusters of 2-3; pedicels resembling petioles in length and form. Calyx somewhat irregular, pale orange; sepals 1.5-2.2 cm long, narrow-ovate to narrowly ovate-oblong, the dorsal and 2 lateral sepals larger; spur 2.5-3.3 cm long, ± curved, tapering, usually pale orange. Corolla moderately irregular, (2)-3-4 × (1.7)-2.2-3.3 cm, usually yellow or orange to scarlet, sometimes semi-double with 7-8 petals; lower 3 petals with very slender claw and broad-ovate to almost reniform limb, the limb fimbriate at base and ± sinuate or undulate; upper 2 petals with claw broader and adnate to calyx at base, often with crimson markings on claw and lower limb. Supernumary petals usually 0, but if present, similar to lower 3 but smaller. Stamens yellow to reddish, the same colour as corolla. Frs dry; carpels with 2 flattened faces and the third or dorsal side rounded and obtusely ribbed, remaining green until abscission, usually 1-2 remaining small; fertile carpels 1-1.4 cm long.
N.: warmer lowland parts, especially in coastal areas; S.: mainly northern coastal areas but occurring S. to Southland; St.: Halfmoon Bay; K.: Raoul Id, occasional.
N. Andes 1883
Waysides and waste places, especially moist and shady situations, also river banks and other waterways in built-up areas, and around many gardens and parks.
FL (Jan)-Oct-May-(Dec).
A fl. and fr. of garden nasturtium are illustrated in Fig. 118. The sp. is very commonly cultivated and there are many cvs differing in fl. colour, extent of petal doubling and habit; many such forms have not yet been found wild.