Ixeris
Cass.
Herbs, annual or biennial with white latex; roots simple; stems usually flaccid, erect,
glabrous, solitary or branched from the base. Leaves chiefly all radical, rarely cauline,
variable, linear or linear-lanceolate, sagittate, acute or obtuse, entire or sinuate-toothed,
petioled or sessile. Inflorescence usually subumbellate corymbs. Heads erect, cylindric;
peduncle slender, erect, bracteate. Involucral bracts in 3 - 3 series, equal or unequal; outer
very minute, ovate or obovate; inner linear-oblanceolate. Florets allligulate; ligules 5-toothed; corolla usually yellow. Stamens 5, appendaged; anthers pinkish or yellow,
slender, base sagittate. Style slender; stigma bifid. Achenes pale brown or dark brown,
usually elliptic-lanceolate or somewhat rounded and angular. Pappus white, simple.
Literature. STEBBINS. G.L. (1939) Critical notes on the genus Ixeris. J. Bot. 75: 34-51.
An Asiatic genus distributed from Himalayan region to Japan; ca 50 species, 3 in India.
Literature. STEBBINS. G.L. (1939) Critical notes on the genus Ixeris. J. Bot. 75: 34-51.
An Asiatic genus distributed from Himalayan region to Japan; ca 50 species, 3 in India.
KEY TO THE SPECIES
| 1a. Leaves all radical; sagittate, acute or obtuse, entire or denticulate; achenes dark brown | 3. Ixeris sagittarioides |
| b. Leaves radical as well as cauline, linear or linear-lanceolate, sinuate toothed; achenes pale brown | 2 |
| 2a. Radical leaves broadly linear-lanceolate, entire, sinuate-toothed or pinnatifid; cauline leaves with acute auricles at base. | 2. Ixeris polycephala |
| b. Radical leaves narrowly linear-lanceolate, entire; cauline leaves not auricled | 1. Ixeris gracilis |
