Common Wildflowers at Tucson Botanical Gardens
White. Blackfoot daisy, Melampodium leucanthum. Sunflower family. Low clumps to 15" high, sometimes sprawling to 2' wide. Dry, rocky slopes from Kansas to Texas, southern Arizona, and Chihuahua, Mexico. Blooms March to November.
White. Tufted evening-primrose, Oenothera caespitosa. Evening-primrose family. No visible stem; plants form dense tufts with flowers among them. White petals turn pink as they age. Dry slopes from western Texas to California and Baja. Blooms primarily in spring at our elevation.
White. Fleabane, Erigeron divergens. Sunflower family. Forms small clumps to 12" high, often weedy. Flowers may be white, pinkish or purple, all with yellow centers. Dry rocky slopes and mesas, open pine woods below 9000'. Western United States. Blooms February to October, but primarily in spring.
Pink. Parry penstemon, Penstemon parryi. Figwort family. Deep pink tubular flowers arranged tightly on the stems, rising to 12-18" high. Numerous flowering stems may appear from the narrow, glossy leaves at the bases. Mountain canyons, and well-drained slopes between 1500' and 5000'. Southern and east central Arizona. Blooms March to May.
Pink. Mexican evening-primrose, Oenothera speciosa. Evening-primrose family. Plants stay close to the ground until they bloom; then blooming stems can rise to 18" tall, though usually lower. Underground runners and free seeding can cause large blooming mats. U.S. prairies south to Mexico. Blooms May to July.
Blue. Lupine, Lupinus sparsiflorus. Pea family. Grows 8" to 16" tall. The plant is hairy and the leaf segments are narrow. Flowers are light blue to lilac. Sandy mesas and foothills below 4500'. Nevada and Arizona, to California and Baja. In favorable season, this lupine colors extensive areas. Blooms January to May.
Blue. Wild Canterbury bells, Phacelia campanularia. Water-leaf family. Plants 8" tall or less, rarely more. Bell-shaped flowers deep blue. Dry, sandy, gravelly places below 4000'. Western Sonoran and Mojave Deserts. Blooms February to April.
Purple. Owl-clover, Castilleja exserta, formerly Orthocarpus purpurascens. Figwort family. Owl-clover blooms quite low to the ground. Blooms resemble soft purple clover. Open mesas and slopes, 1500' to 4500'. Western and southern Arizona, California and Baja. Blooms March to May.
Red Orange. Eaton’s penstemon, Penstemon eatonii. Figwort family. Before blooming, this penstemon appears as a glossy green clump. It is perennial, but generally loses vigor after about three years. It does, however, drop seeds copiously, so a stand of penstemon can persist for long periods. Flowering stems can rise to 18" and consist of tubular flowers arranged tightly on the stem. Occurs on mesas, roadsides, and in fields, from 2000 – 7000'. Southern California, Utah, and Nevada. Blooms March to July.
Orange. Globe mallow, Sphaeralcea ambigua. Mallow family. Blooming stems arising from the base of the plant can get as tall as 3'. Flowers and buds hug the stem all the way to the top of the plant. In season, with enough rain, along Highways 89 and I-10, globe mallows may be seen blooming in pink and white, as well as orange. Blooms almost year round.
Yellow. Bladderpod. Lesquerella gordoni. Mustard family. The plant is gray-green and radiates outward, flat on the ground, from the center. Flowers are bright yellow and smaller than 1/2". Seed capsules are bladder-shaped. Western U.S., northern Mexico below 5000'. Blooms February to May.
Yellow. Desert marigold, Baileya multiradiata. Sunflower family. Flowers arise from low, gray or whitish, velvety clumps. Petals and centers are bright yellow. Sandy plains and mesas below 5000'. West Texas, southern Utah, Nevada, southeastern California, Chihuahua, and Arizona. Blooms March to November.
Yellow. Dogweed. Thymophylla pentachaeta. Sunflower family. Low-growing perennial with golden-yellow flower heads. Only about 4-8" high. Mojave, Sonoran, and Chihuahuan Deserts 2500-4500'. Blooms intermittently from early spring to late fall.
Gold. Gold poppy. Eschscholzia mexicana. Poppy family. Bright golden, four-petalled flowers, 4" to 8" above the ground. It is closely related to the bright orange California poppy. Native throughout Arizona, except in the northeast; also found in west Texas, southern Utah, southeastern California, and northern Sonora, Mexico. Plains and mesas below 4500'. Blooms February to May.