thoroughly spaded into the soil to a depth of 4 or 5 

 inches, and the bed-surface finely pulverized. If pos- 

 sible, the soil should then be sterilized with steam to 

 prevent fungous diseases and the growth of weed seeds. 

 The seed should be sown at the rate of an even tea- 

 spoonful of dry seed to 100 square feet of bed. In 

 order to secure an even distribution of the seed, it is 

 thoroughly mixed into two quarts of land-plaster, 

 finely sifted wood-ashes or bone-meal. Three sowings 

 should be made to insure an even distribution over the 

 bed, the light color of the filler material serving to 

 indicate the evenness of the distribution. The seed 

 must be covered by going over the bed with a roller, 

 or packing with a plank. When young, nicotianas will 

 stand considerable frost, but become more sensitive 

 with age. They are well adapted to pot or tub culture 

 and are fine for summer porch-decoration. N. alata, 

 best known in the trade as N. affinis, and N. Sanderse 

 are the most popular flower-garden plants. Of the 

 larger species for subtropical bedding, N. glauca, N. 

 tomcntosa, and N. Tabacum are best. 



acuminata, 5. 

 affinis, 2. 

 alata, 2. 

 albiflora, 7. 

 angustifolia, 18. 

 arborea, 10, 11. 

 atropurpurea, 18. 

 chinensis, 18. 

 colossea, 11. 

 decurrens, 2. 

 diversifolia, 5. 

 Forgetiana, 6. 

 fragrans, 8. 



glauca, 10. 

 glutinpsa, 16. 

 grandiflora, 2, 18. 

 isodendra, 12. 

 Langsdorffii, 13. 

 longiflora, 1, 7. 

 macrantha, 8. 

 macrophylla, 18. 

 multivalvis, 9. 

 noctiflora, 7. 

 paniculata, 17. 

 persica, 2. 



quadrivalvis, 9. 

 rubra, 18. 

 rustica, 15. 

 Sanderae, 4. 

 semper 'florens , 12. 

 suaveolens, 8. 

 sylvestris, 3. 

 Tabacum, 18. 

 tomentosa, 11. 

 undulata, 8. 

 variegata, 11. 

 wigandioides, 14. 



A. Fls. racemose, paniculate, or axillary, extra-axillary, 

 and solitary; corolla salverform, white or colored, 

 tube long, cylindric; limb-segms. obtuse or acute: 

 (Nos. 1-9. Subgenus Petunioides.) 



B. Ovary 2-celled. 

 c. Lobes of corolla acute. 



D. Color of corolla greenish to purplish or lobes only white. 

 E. Corolla 6-7 times longer than the calyx. 



1. Iongifl6ra, Cav. Erect annual or perennial, 2-3 

 ft. tall: st. slender, bristly-scabrous: Ivs. somewhat 

 clasping, spatulate to lanceolate, prominently undulate, 

 obtuse or acute : fls. 4 in. long, extra-axillary in terminal 

 loose racemes; calyx striate, tubular-campanulate, 5 

 unequal, erect, linear-lanceolate teeth; corolla villous, 

 salverform, night-opening, fragrant, nearly 7 times 

 longer than the calyx; tube slender, swollen above, 

 green or pale violet; lobes J^in. long) yellowish violet 

 without, white within, nearly equal, ovate-lanceolate, 

 obtuse, often emarginate; filaments adnate, near the 

 throat unequal, 1 shorter; anthers yellowish violet; 

 style shorter than the stamens: caps, nearly equaling 

 the calyx. Texas to Chile and Argentina. Rare in 

 cult., and inferior to N. alata. Becomes annual in 

 northern gardens. 



EE. Corolla 4~5 times longer than the calyx. 



2. alata, Link & Otto (N. decurrens, Agardh). Herba- 

 ceous, perennial: st. erect, slender, 2-3^ ft. tall, branch- 

 ing: Ivs. sessile, decurrent, oblong-spatulate to ovate- 

 elliptic; apex obtuse, or acute to nearly acuminate; 

 margin entire or distantly repand-dentate : fls. spread- 

 ing in an open raceme; calyx hirsute, tubular, with 5 

 unequal subulate teeth; corolla villous, night-opening, 

 fragrant; tube slender, yellowish green, 4-5 times 

 longer than the calyx, swollen above; limb oblique, 

 nearly 2 in. across, pale violet beneath, white within; 

 lobes ovate, acute, often emarginate; stamens unequal, 

 not exserted; style exserted: caps, oblong, shorter than 

 the calyx. Brazil, Uruguay, and Paraguay. Gt. 1010. 

 It is doubtful whether the species N. alata is in cult., 

 the garden forms being the varieties. Var. persica, 



Comes (N. persica,. Lindl.). Lower Ivs. subpetiolate, 

 oblong-spatulate, base often subcordate, repand above, 

 all somewhat clasping and auricled or decurrent: cor- 

 olla-tube shorter, limb greenish yellow without, lobes 

 slightly unequal, emarginate. Brazil. B.R. 1592. 

 Intro, into the U. S. as early as 1906. Not much cult. 

 Var. grandiflora, Comes (N. affinis, T. Moore, under 

 which name it is universally known in gardens). Figs. 

 2477, 2478. Fls. very large, and very sweet-scented; 

 tube much dilated, limb yellowish without. G.Z. 1882: 

 253-5. G.C. II. 16:141. Gn. 34, p. 520; 42, p. 126; 

 50, p. 212; 56, p. 384. Gng. 5:182. G. 27:323. Known 

 only in cult. An extremely popular plant, blooming 

 freely throughout the season until killed by frost. On 

 account of its slender habit, it should be planted in a 

 place protected from strong winds. It is apparently 

 perennial, but is treated as a half-hardy annual. It 

 self-sows, and often maintains itself from year to year 

 in the Middle States and the S. In the warmer parts of 



2479. A good border effect with Nicotiana. N. sylvestris. 



the S., the roots live over winter with- a little protec- 

 tion. Fall-sown seedlings make excellent pot-plants in 

 the winter, the fls. opening in the early evening and 

 closing in the morning, and are very fragrant. 



DD. Color of corolla entirely white. 

 3. sylvestris, Spegaz. & Comes. Figs. 2479, 2480. 

 Herbaceous, perennial, glandular-pilose throughout: 

 st. tall, leafy below, branching above: Ivs. sessile, broad, 

 oblong-spatulate; the lower dilated at the base, half- 

 clasping and auricled, slightly decurrent, the apex, 

 rotund or obtuse; the upper acute, margin reflexed: 

 fls. drooping, in short racemose panicles; pedicels nearly 

 equaling the calyx; calyx 5-angled, somewhat swollen, 

 short and unequally toothed, teeth ovate-acute; corolla 

 white, fragrant, salverform, pilose; tube 6-7 times longer 

 than the calyx, above somewhat inflated; limb white 

 within; lobes nearly equal, ovate-triangular, often 

 emarginate, becoming reflexed. Argentina. G.C. III. 

 26:357. G.W. 7:230; 12:318. A.F. 24:600. G.M. 

 52:48. Gn. 59, p. 186. Gn. W. 15:442. The Ivs. are 

 rugose, veiny, and more attractive than in A. alata but 

 the limb of the fl. is less oblique, the tubes more swollen 



