FAM. 1.53. 121 



S. tuberosum, Potato. Herbs without prickles, leaves odi-pinnatc and 

 interrupted. Cultivated for its tu' 



S. Melongena, Rig-pleat, Perennial, prickly; flowers t\ ■ i. cor- 



olla purplish, fruit large, glossy-purple or white. Cu'.tiwv 

 3. Corolla-limb plaited, somewhat irregular; — herbs with entire leaves 

 and large flowers solitary in the axils; st . I. didynamous, 



and a fifth sometimes smaller or obsolete. Cultivated in many 



>; the two principal species are: - Petunia 



P. nyctaginiflora. Erect, branched; corolla white, its tube thrice longer than 

 the calyx. 



P. violacea. Ascending; corolla violet-purple, its tube twice longer than the 

 calyx. 



3. Corolla limb regular. --------- _ j 



4. Stamens exserted; — shrubs or woody vines, prickly, with axillar 



or 4-parted flowers. ----- Lycium, \fatrimon_. 



L. Carolinianum. Stems erect, widely branched, with fleshy clustered leaves; 

 flowers small, purple; berries red. Along the coast. 

 4 Stamens included, --_--__-_. 



5. Shrubby; calyx campanulate or tubular, short; fruit a berry; — ieaves 



entire; flowers axillary, clustered, 5-parted. Cultivated. - Cestrum 



C. diurnum, Day Jessamine, with white, scented flowers. 



C. nocturnum, S ight-blooming Jessamine, with creamy-yellow, strongly scented 

 flowers. 



C. elegans, with rose-pink and carmine flowers, fragrant. 



5. Herbaceous; calyx prismatic, long; fruit a prickly capsule; — leaves 

 toothed or angled; flowers axillary, solitary, 5-parted, corolla 

 tube much longer than the calyx. Waste places. Summer. 



Datura, Jimson Weed, Thorn-apple 



D. Stramonium. Stem stout, green; foliage nearly smooth; corolla white. 



D. Tatula. Stem stout, purple; foliage nearly smooth; corolla violet or laven- 

 der. 



Several species with simple or double flowers are cultivated in various colors. 

 5. Herbaceous; calyx urn-shaped; fruit a capsule usually splitting into 

 4 valves; — tall plants; leaves simple, entire or undulate; fl>-. 

 ers in terminal racemes, panicles or thyrses, 5-parted. Culti- 

 va: ---------- Nicotiana 



N. alata (affinisi. Leaves lance-obovate or ovate-elliptic, sessile or clasping, 

 the upper ones small and narrow; flowers white, sometimes purplish out- 

 side, remote in a virgate raceme, open at night-fall and fragrant. 



N. tabacum, 1*004 mostly ovate or ovate-lanceolate, acumir. 



sessile or decurrent; flowers red or purplish in a large panicle, diurr 



153. Borraginaceae, Borage Family. 



Herbs or shrubby plants with bristly pubescent foli- 



; leaves simple, alternate, ezsttpulate; flowers 5-part 



in cymes or scorpioid racemes Of spikes; sepals more or 



less united; corolla-lobes equal; stamens adnate to the 



corolla-tube, often with appendages; ovary superior, styles 



