Lapsanastrum apogonoides
Taxon 44: 19. 1995.
Common names: Japanese nipplewort
IntroducedIllustrated
Basionym: Lapsana apogonoides Maximowicz Bull. Acad. Imp. Sci. Saint-Pétersbourg 18: 288. 1873
Treatment appears in FNA Volume 19. Treatment on page 255.
Stems slender, weak, flattened. Leaves: basal blades 40–100 × 10–25 mm, dentate, apices obtuse. Phyllaries broadly lanceolate, thin, scarcely keeled, 4–5 mm, stellately spreading in fruit. Corollas 6–10 mm. Cypselae straight, 4–5 mm. 2n = 16.
Phenology: Flowering May–Jun.
Habitat: Cultivated fields, disturbed areas, low boggy areas
Elevation: 10–100 m
Distribution
Introduced; Oreg., Asia (China, Japan, Korea).
Discussion
Lapsanastrum apogonoides is distinguished by its prostrate habit, weak stems, lyrate leaves, and 5 phyllaries spreading in fruit.
Selected References
None.
Lower Taxa
None.