Poison Larkspur
Delphinium trollifolium, 4" band pot
Description: Plants 70-150 cm high. Stems often hollow. Leaves well distributed along base and stem, those of the upper stem much like those at the base and lower stem. Blades sharply toothed. Inflorescence loose. The lower pedicels are much longer than the calyx spurs. Sepals flared outwards, 18-25 mm long.
Larkspur is an attractive perennial wildflower with one to several stout and erect stems arising as much as 70-150 cm high. The stems are hollow and unbranched below the inflorescence. The herbage ranges from slightly hairy to smooth. There are numerous leaves on the stems and these become reduced in size upwards on the stem. The lower leaves range from 10-20 cm wide and are 3-lobed nearly to their base (See photo at right.). Each of the lobes are in turn further divided deeply into 2-3 segments.
photo credit: Columbian_Larkspur_Delphinium trolliifolium_070212 (Silver Falls, OR), Catherine Alexander, Flickr, (CC BY 2.0)
photo credit: Columbian larkspur, Frank Fujimoto, Flickr, (CC BY-NC-ND 2.0)
photo credit: Columbian Larkspur Delphinium trolliifolium, Brenda Dobbs, Flickr, (CC BY-NC 2.0)
