Frasera umpquaensis

M. Peck & Applegate

Madroño 6: 12. 1941.

Common names: Umpqua frasera or green-gentian
EndemicConservation concern
Synonyms: Swertia umpquaensis (M. Peck & Applegate) H. St. John
Treatment appears in FNA Volume 14.

Herbs monocarpic, 3–14 dm, glabrous. Stems 1. Leaf blades not white-margined; basal spatulate-obovate, 15–60 (including proximal petiolar portions) × 3–17 cm; cauline leaves generally whorled, blade widely elliptic to ovate, apex obtuse to acute (proximal) to acuminate (distal). Inflorescences dense, sometimes interrupted proximally. Flowers: calyx 7–15 mm; corolla white or pale greenish yellow, pale yellow near midvein, sometimes with violet-blue tinge, not spotted, 5.3–11 mm, lobes ovate-oblong, apex acuminate; androecial corona a dense fringe to 5 mm; style short, ± stout and indistinctly differentiated from summit of ovary; nectaries and foveae 1 per corolla lobe, foveae round or nearly so, opening directly adaxial to nectary, without a differentiated area on the corolla surface, rim raised, with long, incurved fringes all around. 2n = 78.


Phenology: Flowering late spring–summer.
Habitat: Mountain meadows, open woods.
Elevation: 1200–2000 m.

Discussion

Former uncertainty as to the distinctness of Frasera umpquaensis from F. fastigiata has been cleared up by B. L. Wilson et al. (2010).

Selected References

None.

Lower Taxa

None.