Class
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Rorippa sylvestris (L.) Besser, Enum. Pl. [Besser] 27 (1822)
Vernacular Name(s):
Creeping yellow cress
Description
Glabrous perennial rhizomatous herb. Stems erect, often flexuous, 30–70 cm tall. Lvs variable in shape; margins toothed. Rosette lvs petiolate, auriculate at base, deeply pinnatifid, 4–10–(25) × 2–4 cm. Middle and upper lvs smaller, 1–2-pinnatifid, linear to ovate; lobes narrow-lanceolate to linear, entire or toothed; basal auricles present. Pedicels erecto-patent at flowering, spreading at fruiting, 5–15 mm long. Sepals 2–2.5 mm long. Petals yellow, (3)–4–5 mm long. Silique glabrous, linear, curved, 10–15 × 1–1.5 mm, but often not or poorly developed; valves with median vein weak or 0; style c. 0.5 mm long. Seeds brown, c. 0.6 mm long, finely colliculate, in 2 rows per locule.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
Biostatus
Exotic
Phenology
Flowering: (Oct.)–Dec.–Feb.–(Mar.); Fruiting: Dec.–Feb.–(Mar.)
Bibliography
Besser, W.S.J.G. von 1822: Enumeratio Plantarum hucusque in Volhynia, Podolia, gub. Kiioviensi, Bessarabiia Cis-Tyraica et Circa Odessam Collectarum, Simul cum Observationibus in Primitas Florae Galiciae Austriacae. Wilna.
