2b. Leaves palmately divided into cuneate lobes =Crane's-bill, Geranium pusillum.= 3a. Leaves ternately divided, the lobes pinnatifid (2-4 dm. high; flowers purple, late spring and summer) =Herb Robert, Geranium robertianum.= 3b. Leaves palmately 3-11-lobed --4. 4a. Petals 12 mm. long or more (3-6 dm. high; flowers pale purple, spring) =Wild Geranium, Geranium maculatum.= 4b. Petals less than 10 mm. long (Crane's-bill) --5. 5a. Seed-bearing portion of the pistil smooth, glabrous or nearly so (low spreading plant; flowers purple, late spring and summer) =Crane's-bill, Geranium columbinum.= 5b. Seed-bearing portion of the pistil transversely wrinkled (widely branching. 1-3 dm. tall; flowers purple, summer) =Crane's-bill, Geranium molle.= 5c. Seed-bearing portion of the pistil pubescent (widely branching. 1-5 dm. tall) --6. 6a. Leaves divided almost to the base (flowers pinkish or white, spring and summer) --7. 6b. Leaves divided one-half to two-thirds the way to the base (flowers purple, summer) =Crane's-bill, Geranium rotundifolium.= 7a. Petals white or pale pink; flowers in compact clusters =Crane's-bill, Geranium carolinianum.= 7b. Petals pink-purple; flowers in loose clusters =Crane's-bill, Geranium bicknellii.= RUTACEAE, the Rue Family Shrubs or low trees, with compound leaves frequently dotted with translucent glands; flowers small, greenish-white, with 3-5 sepals, petals, and stamens. 1a. Leaflets 5-9; stems thorny =Prickly Ash, Zanthoxylum americanum.= 1b. Leaflets 3; stems not thorny =Hop Tree, Ptelea trifoliata.= SIMARUBACEAE, the Quassia Family Trees, with pinnately compound leaves and small greenish-yellow flowers in large panicles in early summer, ripening into winged fruits. One species in Michigan, escaped from cultivation chiefly in towns =Tree of Heaven, Ailanthus glandulosa.= POLYGALACEAE, the Milkwort Family Small herbs, with alternate or whorled simple leaves, and small irregular flowers; sepals 5, petals 3, stamens 6 or 8, more or less united with each other and with the petals. 1a. All of the leaves alternate --2. 1b. Some or all of the leaves in whorls (1-4 dm. high; flowers greenish, purple, or white; summer) (Milkwort) --6. 2a. Flowers few, loosely clustered, 15-20 mm. long (1-3 dm. high; flowers purple; early summer) =Flowering Wintergreen, Polygala paucifolia.= 2b. Flowers numerous, in a spike or raceme --3. 3a. Stem-leaves minute, linear-subulate; stem slender, erect, 3-7 dm. high (flowers pink; summer) =Milkwort, Polygala incarnata.=