Quick answer: 31 native New Mexico plants have a recorded bloom range that includes May.
31 species
- Alderleaf mountain mahogany Cercocarpus montanus · 9 states
- Apache plume Fallugia paradoxa · 6 states
- Autumn sage Salvia greggii · 2 states
- Buffalograss Bouteloua dactyloides · 9 states
- Butterflyweed Asclepias tuberosa · 37 states
- Common sotol Dasylirion wheeleri · 3 states
- Common yarrow Achillea millefolium · 31 states
- Creeping Oregon grape Mahonia repens · 11 states
- Creosote bush Larrea tridentata · 5 states
- Desert marigold Baileya multiradiata · 4 states
- Desert willow Chilopsis linearis · 4 states
- Gambel oak Quercus gambelii · 6 states
- Golden currant Ribes aureum · 3 states
- Honey mesquite Prosopis glandulosa · 3 states
- Indian blanket Gaillardia pulchella · 18 states
- Lemon beebalm Monarda citriodora · 15 states
- Mexican buckeye Ungnadia speciosa · 2 states
- Mexican hat Ratibida columnifera · 17 states
- New Mexico locust Robinia neomexicana · 2 states
- Ocotillo Fouquieria splendens · 3 states
- Pink evening primrose Oenothera speciosa · 8 states
- Quaking aspen Populus tremuloides · 24 states
- Red yucca Hesperaloe parviflora · 2 states
- Rocky Mountain bee plant Peritoma serrulata · 22 states
- Rocky Mountain iris Iris missouriensis · 7 states
- Rocky Mountain penstemon Penstemon strictus · 4 states
- Scarlet globemallow Sphaeralcea coccinea · 5 states
- Utah serviceberry Amelanchier utahensis · 3 states
- Virginia creeper Parthenocissus quinquefolia · 27 states
- Winterfat Krascheninnikovia lanata · 6 states
- Yellow bells (esperanza) Tecoma stans · 3 states