catkins

willow

Narrow-leaved waterside tree

• birchPale deciduous hardwood
• alderRiparian deciduous tree
• hazelWarm brownish-green hue

oak · poplar · walnut · hickory · beech · hornbeam · aspen · cottonwood · pussy willow · filbert

pendulous

Hanging so as to swing

• danglingSuspended and swaying freely
• droopingHanging or bending downward
• tasselOrnamental hanging cluster

fuzzy · cylindrical · slender · flexible · swaying · delicate · wispy · soft · furry · silky

inflorescence

Plant's complete bloom arrangement

• floweringProducing reproductive structures
• pollinationFlower reproductive transfer
• stamenPollen-producing flower organ

anther · pistil · stigma · ovule · fertilization · gametes · reproduction · pendulous · drooping · cylindrical

pollen

Floral reproductive grains

• airborneTraveling through air
• allergensImmune reaction triggers
• hayfeverAllergic reaction to pollen

outcrossing · cross-pollination · allergenic

budding

Developing from an outgrowth

• vernalRelating to spring
• awakeningReturn to consciousness
• renewalMaking current again

emergence · sprouting · early bloom · seasonal · deciduous · leafing · thaw · equinox · harbinger · precocious

• plant growthbloom, bud, buds, flower, fruit
• Cottonwoods
• Willows and Poplarswillow, poplar, aspen, cottonwood, osier
• treesoak, birch, maple, pine, elm
• allergenspeanuts, food allergens, shellfish, tree nuts, dairy
• oakswhite oak, English oak, red oak, black oak, live oak