IOO 



3a. Spikes dense, continuous (flowers purple or blue, varying to 



white) 4. 

 3b. Spikes slender, interrupted, the flowers scattered (corolla white 



or pale-blue) 6. 

 4a. Leaves lanceolate, manifestly petioled (1 2 m. high) 



Terrain, Terbena hastata. 



4b. Leaves sessile, not lanceolate (5 8 dm. high) 5. 

 5a. Leaves narrowly oblanceolate, tapering at the entire base 



Terrain, Terbena ang'ustifolia. 

 5b. Leaves oblong to obovate, not tapering at the base 



Terrain, Terbena stricta. 

 6a. Leaves incised, tapering to a sessile base (5 10 dm. high) 



Terrain, Terbena officinalis 

 6b. Leaves serrate, petioled (1 2 m. high) 



Terrain, Terbena urticaefolia. 



SOLANACEAE, the Nightshade Family 



Herbs or shrubs, with alternate leaves and regular or slightly 

 irregular flowers; sepals 5, united; corolla of 5 united petals, bearing 

 the 5 stamens attached; ovary 1, 2 5 (usually 2) -celled, with a slender 

 style. 



la. Corolla rotate; anthers close together (flowers in summer) 2. 

 Ib. Corolla not rotate; anthers separate 5. 



2a. Stem and leaves prickly (3 8 dm. high) 3. 

 2b. Stem and leaves not prickly 4. 



?,a. Flowers white or bluish Horse Nettle, Solanum carolinense. 



3b. Flowers yellow Buffalo Bur, Solanum rostratum. 



4a. Climbing vine; leaves frequently lobed (flowers blue) 



Bittersweet, Solanum dulcamara. 

 4b. Not climbing; leaves toothed (flowers white) 



Nightshade, Solannm nig-rum. 



5a. Climbing or trailing shrub, with purplish, white, or greenish 

 flowers about 1 cm. wide (frequently thorny; flowers in sum- 

 mer) Matrimony Tine, Lycium halimifolium. 

 5b. Herbaceous plants, not climbing 6.- 



6a. Flowers white, red, or blue, 2.5 cm. or more wide (sum- 

 mer) 7. 



6b. Flowers yellow, yellowish-white, or greenish-yellow (sum- 

 mer) 12. 



7a. Corolla-tube 10 cm. long or more (5 12 dm. high) 8. 

 7b. Corolla-tube 5 cm. long or less 10. 



8a. Stem finely pubescent; leaves entire or nearly so 



Thorn-apple, Datura metel. 



8b. Stem glabrous; leaves coarsely toothed (Jimson Weed) 9. 

 9a. Stem green; corolla white Jimson Weed, Datura stramonium. 



9b. Stem purple; corolla light-blue or purple 



Jimson Weed, Datura tatnla. 



