* Big-leaf Maple: Acer macrophyllum- Many trees now in bloom.
* Common Camas: Camassia quamash - Beginning to bloom above the Old Highway.
* Chocolate Lily: Fritillaria affinis - A few in bloom.
* Yellow Bells: Fritillaria pudica - A fair amount still in bloom, especially higher up the hillsides.
* Meadow Death-camas: Zigadenus venenosum var. venenosum- Common.
* Grass Widows: Sisyrinchium douglasii -A few still in bloom.
Common Bastard Toad-flax: Comandra umbellata var. californica- Getting close to blooming.
* Miner's Lettuce: Claytonia perfoliata - Common.
* Water Chickweed: Montia fontana - Numerous
* Line-leaf Montia: Montia linearis - Common.
* Chickweed: Stellaria media - Numerous
* Upland Larkspur: Delphinium nuttallianum - A few trying to bloom along the creek.
* Western Buttercup: Ranunculus occidentalis var. occidentalis - Pretty numerous bloom.
* Shining Oregon Grape: Berberis aquifolium- Fairly numerous.
* Little Western Bittercress: Cardamine oligosperma- Fairly common.
* Oaks Toothwort: Cardamine nuttallii - Beginning to bloom.
* Spring Whitlow-grass: Draba verna- Numerous bloom.
* Small-flowered Prairie Star: Lithophragma parviflorum - A few in bloom.
* Northwestern Saxifrage: Micranthes integrifolia - Many still in bloom.
*Rusty-hair Saxifrage: Micranthes rufidula - A few in bloom.
* Serviceberry: Amelanchier alnifolia - A few in bloom.
* Columbia Gorge Lupine: Lupinus latifolius var. latifolius - A few in bloom at low elevation along the Old Highway at the west and east ends of the Catherine Creek plateau.
Bighead Clover: Trifolium macrocephalum - A few nearly in bloom.
* Filaree: Erodium cicutarium - A few in bloom.
Cut-leaf Violet: Viola sheltonii - Lots of leaves.
* Columbia Desert Parsley: Lomatium columbianum - A few plants in bloom, mostly going to seed.
* Klickitat Desert Parsley: Lomatium klickitatense - Very common.
* Nine-leaf Desert Parsley: Lomatium triternatum - Fairly common. Until seeds are examined, these could be L. triternatum or perhaps both species are present .
* Biscuitroot: Lomatium macrocarpum - Fairly common.
* Bare-stem Desert Parsley: Lomatium nudicaule - Fairly common.
* Butterfly-loving (Pungent) Desert Parsley: Lomatium papilioniferum
* Sierra Snake Root: Sanicula graveolens - A few close to blooming.
* Desert Shooting Star: Dodecatheon conjugens - A few in bloom
* Poet's Shooting Star: Dodecatheon poeticum - Common.
* Midget Phlox: Microsteris gracilis - Common.
* Ball-head Waterleaf: Hydrophyllum capitatum var. thompsonii- A few in bloom.
* Meadow Nemophila: Nemophila pedunculata - A few in bloom.
* Woods Nemophila: Nemophila parviflora - A few in bloom.
* Silver-leaf Phacelia: Phacelia hastata var. hastata - A few coming into bloom.
* Great Hound's Tongue: Adelinia grandis - Several in bloom.
* Rusty Popcorn Flower: Plagiobothrys nothofulvus - Numerous bloom above the power lines, towards the slopes above Major Creek.
* Slender Popcorn Flower: Plagiobothrys tenellus - Numerous.
* Henbit: Lamium amplexicaule - A few in bloom.
* Small-flowered Blue-eyed Mary: Collinsia parviflora - Common
* Few-flowered Blue-eyed Mary: Collinsia sparsiflora var. bruceae - Fairly common, including many albino plants.
* Common Monkey Flower: Erythranthe guttata - A few in bloom near the old highway.
* Small-flowered Tonella: Tonella tenella - A few in bloom.
* Naked Broomrape: Aphyllon purpureum - Very numerous.
* Cleavers: Galium aparine - Numerous, but only in bloom near the Old Highway.
* Long-spurred Plectritis: Plectritis ciliosa - A few in bloom.
* Rosy Plectritis: Plectritis congesta - Numerous.
* White Plectritis: Plectritis macrocera - Numerous along the Old Highway just west of Major Creek.
* Bigroot: Marah oreganus- A few in bloom.
* Northwest Balsamroot: Balsamorhiza careyana x deltoidea - A few in bloom near the arch.
* Gold Stars: Crocidium multicaule -Many still in bloom, several with blooms roughly the diameter of a half dollar coin.
* False Agoseris: Nothocalais troximoides - Numerous.
Western Groundsel: Senecio integerrimus var. exaltatus - A few nearing bloom.
* Common Dandylion: Taraxacum officinale - Fairly common in disturbed areas.