[The Genus Ivesia East of the Cascade Mts. of Oregon and Washington]

Bailey's Ivesia, Owyhee Ivesia

Ivesia baileyi var. beneolens

Synonym: Horkelia beneolens

Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens)

Bailey's ivesia as seen on rock outcrops at Domingo Pass in the Pueblo Mountains of southeastern Oregon..............May 31, 2012.

Photo at right of Ivesia baileyi var. beneolens on the Steens Mt.....July 16, 2000. Note the narrow white petals, the larger, spreading sepals and the maroon, pentagonal hypanthium.
Characteristics:

Bailey's Ivesia is a small perennial herb with aromatic, finely glandular-pubescent mixed with short spreading hairs. The stems spread or ascend from a rosette of basal leaves to a length of 10-20 cm. The basal leaves 6-10 cm long (including the long petioles) and are pinnately compound, with 11-15 leaflets. The leaflets are widely spaced into 5-10 pairs, with a single leaf at the tip. Individual leaflets are palmately 3-5 lobed, parted about halfway to the midrib with rounded to blunt tipped lobes. The terminal leaflet is 3-5 pinnatifid and lobed. Each leaflet is about 6-10 mm long. The several stem leaves are reduced in size.

The inflorescence is an open branched cyme with spreading or recurved pedicels. The pedicels range from 5-13 mm long. The hypanthium is fleshy and pentagonal in shape and about 3-4 mm wide. The bractlets are lanceolate to ovate in shape, and 0.8-1.8 mm long. The sepals are spreading, from 1.6-3.4 mm long , triangular in shape with pointed tips. The petals are oblanceolate to narrowly spatulate, measuring from 1.5-2.4 mm long. The color of the petals range from white to cream or pale yellowish. There are 5 stamens.


Varieties:

Variety baileyi: Petals cream to pale yellow. Hypanthium yellow to golden.

Variety beneolens: Petals white. Hypanthium pale green or maroon.


The photo above shows the branched, open cyme of Bailey's Ivesia. Note the long, recurved pedicels.

Habitat:

Bailey's Ivesia is found between the elevations of 1000-2600 meters in cracks and crevices on cliffs and in large rock formations.


Range:

Bailey's Ivesia is found from southeaster Oregon to southwestern Idaho and south into northern Nevada and northeastern California.

Variety baileyi is found in northwestern Nevada and northeastern California.

Variety beneolens is found in Harney and Malheur counties in southeastern Oregon, southwestern Idaho, and northern Nevada.


Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens) - Leaf of Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens) - Flower of Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens)

Close-up images of the leaves and flowers of Bailey's ivesia as seen on rock outcrops at Domingo Pass in the Pueblo Mountains of southeastern Oregon..............May 31, 2012.

Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens) - Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens)

Uper leaf surface of baileyi/beneolens7d.jpgBailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens)Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens)

Lower leaf surface of Bailey's Ivesia, Owyhee Ivesia: Ivesia baileyi var. beneolens (Synonym: Horkelia beneolens)

Bailey's ivesia as seen on cliffs about half way between the Steens Mountain summit and Wildhorse Lake, Harney County, Oregon..............July 10, 2014.


Ivesia baileyi var. beneolens in a crack at the edge of a cliff on the Steens Mt.....July 16, 2000.


The basal leaves of Ivesia baileyi var. beneolens.

Another close-up of Ivesia baileyi var. beneolens.

Paul Slichter