Yellow

Showing 37–48 of 100 results

Heliomeris multiflora / showy goldeneye
- a "Doggone" Yellow Composite (DYC) with 5-14 ray florets; golden dome of disc florets
- multi-stemmed perennial forms clumps
- often seen in profusion (but not always)
- long, thin, lanceolate to linear leaves; maybe with a few small teeth along the edges
- leaves have a strong midrib vein and distinct side veins
Heterotheca villosa / hairy goldenaster
- yellow composite with 10-20 ray florets, orange-brown disk
- hairy leaves and stems
- blooms throughout season, often densely
- disturbed and challenging habitats
Heuchera parvifolia / littleleaf alumroot
- subalpine, alpine... on rocks
- clusters of round or kidney-shaped leaves
- leaves lobed, all basal (no stem leaves)
- inflorescences tower over leaves
- clumps of teeny, yellow flowers along a spike-like flowering stalk
Hieracium scouleri / western hawkweed
- dandelion-like yellow flower heads
- square-ended petals; long stamens with split ends
- central yellow "button"
- hairy all over, especially on leaves and lower stem
- blooms all summer
Huechera cylindrica / coral bells
- oval-shaped leaves growing in clumps/tufts - all basal
- leaf edges with small lobes or teeth
- teeny pale yellow, creamy, green or pink flowers on a leafless stem
- flowers more dense at top of spike than lower down
- in woods, on cliff-side ledges, rocky slopes and subalpine meadows
Hyocyamus niger / black henbane
- highly toxic! including contact dermatitis
- 5-lobed, funnel-shaped flowers, brownish yellow with purple veins and center; 1.5" across
- flowers in summer, e.g. warm June, July
- elliptical leaves, pointy tips, toothed or lobed margins, prominent veins
- highly disturbed areas: wastelands, field edges etc.
Hypericum perforatum / St. John’s wort
- bright yellow, 5-petaled flowers
- many stamens sticking out every which way
- sizable black and/or white glands on leaves and petals
- waist high and grows in large colonies (invasive)
- not (yet) seen west of the Tetons
Ivesia gordonii / Gordon’s mousetail
- subalpine to alpine
- low, on shallow, rocky soils
- individual stalks are leaves with ~20 overlapping lobes
- clusters of teeny yellow flowers on naked stems
Lactuca serriola / prickly lettuce
- numerous dime-sized yellow flowers in an "airy" panicle
- buds droop or hang in a "shepherd's hook" before opening
- seed heads are dandelion-like, but more delicate
- highly divided, prickly leaves
- mostly in "waste" areas
Linaria vulgaris / yellow toadflax
- fine, threadlike leaves, plants up to 3 feet tall
- flowers similar to snapdragon, pale yellow with orange lower lip, long spur
- flowers in tight terminal clusters
- plants typically in patches
- "noxious" weed in Idaho
Lithospermum ruderale / Columbia puccoon
- small, pale yellow flowers in early spring
- flowers in dense clusters, nestled among the leaves
- 1–3 in. long, linear leaves, notably crowded on upper part of stems
- in dry areas, especially with sagebrush
Lomatium dissectum / fernleaf biscuitroot
- blooms soon after snowmelt
- yellow or purple-ish flowers in compound umbels
- highly divided, fern-like leaves
- rocks, rocky soils, sagebrush communities