Golden Clover, Hop CloverYellow Clover, Greater Hop
Synonym: Trifolium agrarium
The upper stem with the yellow-flowered inflorescence
of greater hop clover. Found at Kreps Lane, Conboy National Wildlife Refuge.........July
Close-ups of the inflorescence
and upper stem leaves of greater hop clover as seen along the valley trail about one-half mile northwest and uphill from the Painted Rocks trailhead, Little Spokane River Natural Area.........July
Close-ups of the inflorescence and the ternately compound leaf and inflorescence of greater hop
clover.........July 9, 2006. This species typically has wider flower
heads (at least 9 mm wide when pressed) with more than 30 flowers. The similar
least hop clover has flower heads with less than 30 flowers and measuring less
than 8 mm wide when pressed. Note that the petiole of each leaflet
is about the same length, a characteristic that distinguishes this species from
hop clover, Trifolium procumbens (in which the petiole of the terminal leaflet
is about twice as long as those of the 2 lateral leaflets).
The photo above shows a close-up of the inflorescence
and upper stem leaves of greater hop clover as seen along Kreps Lane in Conboy
National Wildlife Refuge at the southeastern edge of Mt. Adams.........July
2, 2006. Note the blunt tips to the leaves. This species can be identified from other yellow-flowered clovers
in that it generally has more than 30 flowers per inflorescence.
Greater hop clover as seen along the Lake Creek Trail uphill about one-quarter mile from the junction with the Umatilla Rim Trail #3080, Umatilla National Forest.........July 24, 2012.