A Key to the Families and Genera of the Wild Plants of Austin, Texas

2-lipped 3-foliate Achenes Anthers appendages awns axils base berry berry-like branches bristles Calyx Calyx tube carpels Cassiaceae celled chaffy Cistaceae climbing vines compound leaf conspicuous corolla Corolla lobes deeply lobed dioecious Disk flowers drupes Ehretiaceae elongated Euphorbiaceae Fabaceae Family ferns filaments united flat fleshy flower cluster Flowers blue Flowers irregular Flowers large Flowers pink flowers small flowers white flowers yellow Fruit a capsule globular hairy Heliotropiaceae herbs inches long involucral bracts Leaf blades leaflets Leaves alternate Leaves opposite Leaves pinnately compound Leaves simple monoecious monoecious or dioecious nutlets Nyssaceae Ovary Ovary 1-celled Ovary inferior Ovary superior ovules ovules attached palmately Pappus perennials perianth petals pinnately pistillate pistillate flowers Pods Polygalaceae prickly Primrose prostrate purple racemes Ray flowers rays yellow ribbed Rutaceae scale-like seeds sepals shrubby shrubs Shrubs or trees slender spikes sporangia sporangia borne stalk stamens staminate and pistillate stems stigma subtended succulent toothed water plants Wild winged woody