| 1. Flowers solitary or 23 at ends of inflorescence branches |
| |
| 2. Inflorescence branches widely spreading, stiff; leaf-sheath opening glabrous |
| L. divaricata |
| 2' Inflorescence branches erect or arching; leaf-sheath opening hairy |
| L. parviflora |
| 1' Flowers in 1 or more clusters, often head-like |
| |
| 3. Leaves channeled; inflorescence nodding inflorescence dense |
| L. spicata |
| 3' Leaves flat; inflorescence not nodding |
| |
| 4. Inflorescence not distinctly head-like; perianth 1.52 mm |
| L. subcongesta |
| 4' Inflorescence ± head-like; perianth 25 mm |
| |
| 5. Stem and inflorescence generally greenish, sometimes brown; inflorescence generally at least slightly open, with spreading branches; widespread |
| L. comosa |
| 5' Stem and inflorescence blackish; inflorescence very compact; alpine |
| L. orestera
|