Quick answer: 67 native Pennsylvania plants have a recorded bloom range that includes June.
67 species
- American basswood Tilia americana · 32 states
- American bellflower Campanulastrum americanum · 19 states
- American holly Ilex opaca · 24 states
- American mountain ash Sorbus americana · 18 states
- American plum Prunus americana · 25 states
- Arctic brome (Kalm's brome) Bromus kalmii · 5 states
- Black cherry Prunus serotina · 32 states
- Black huckleberry Gaylussacia baccata · 8 states
- Black locust Robinia pseudoacacia · 12 states
- Black tupelo Nyssa sylvatica · 19 states
- Black-eyed Susan Rudbeckia hirta · 42 states
- Box huckleberry Gaylussacia brachycera · 4 states
- Brown-eyed Susan Rudbeckia triloba · 6 states
- Butterflyweed Asclepias tuberosa · 37 states
- Canada anemone Anemone canadensis · 22 states
- Canada wild rye Elymus canadensis · 18 states
- Cardinal flower Lobelia cardinalis · 37 states
- Carolina springbeauty Claytonia caroliniana · 8 states
- Chokecherry Prunus virginiana · 35 states
- Common persimmon Diospyros virginiana · 17 states
- Common yarrow Achillea millefolium · 31 states
- Creeping phlox Phlox subulata · 11 states
- Cucumbertree Magnolia acuminata · 12 states
- Eastern red columbine Aquilegia canadensis · 36 states
- Eastern teaberry Gaultheria procumbens · 9 states
- Fire pink Silene virginica · 8 states
- Fireweed Chamerion angustifolium · 28 states
- Flame azalea Rhododendron calendulaceum · 12 states
- Flowering dogwood Cornus florida · 22 states
- Foxglove beardtongue Penstemon digitalis · 31 states
- Great laurel Rhododendron maximum · 13 states
- Hairy beardtongue Penstemon hirsutus · 10 states
- Harebell Campanula rotundifolia · 25 states
- Honey locust Gleditsia triacanthos · 9 states
- Kentucky coffeetree Gymnocladus dioicus · 15 states
- Lanceleaf coreopsis Coreopsis lanceolata · 28 states
- Little bluestem Schizachyrium scoparium · 23 states
- Lowbush blueberry Vaccinium angustifolium · 14 states
- Mountain laurel Kalmia latifolia · 17 states
- Nannyberry Viburnum lentago · 23 states
- New Jersey tea Ceanothus americanus · 31 states
- Pagoda dogwood Cornus alternifolia · 25 states
- Partridgeberry Mitchella repens · 17 states
- Pearly everlasting Anaphalis margaritacea · 18 states
- Pin cherry Prunus pensylvanica · 3 states
- Plumleaf azalea Rhododendron prunifolium · 5 states
- Prairie Junegrass Koeleria macrantha · 15 states
- Prairie dropseed Sporobolus heterolepis · 11 states
- Quaking aspen Populus tremuloides · 24 states
- Red baneberry Actaea rubra · 22 states
- Scaly blazing star Liatris squarrosa · 5 states
- Scarlet beebalm Monarda didyma · 18 states
- Shagbark hickory Carya ovata · 22 states
- Showy tick trefoil Desmodium canadense · 21 states
- Shrubby five-fingers Sibbaldiopsis tridentata · 8 states
- Sideoats grama Bouteloua curtipendula · 25 states
- Smooth azalea Rhododendron arborescens · 4 states
- Sourwood Oxydendrum arboreum · 14 states
- Sundial lupine Lupinus perennis · 25 states
- Swamp rose Rosa palustris · 11 states
- Sweet crabapple Malus coronaria · 5 states
- Sweetbay magnolia Magnolia virginiana · 12 states
- Trumpet vine Campsis radicans · 24 states
- Tulip tree Liriodendron tulipifera · 17 states
- Umbrella tree magnolia Magnolia tripetala · 6 states
- Virginia creeper Parthenocissus quinquefolia · 27 states
- White baneberry Actaea pachypoda · 16 states