GENUS ii. 



POTATO FAMILY. 



2. Nicotiana longiflora Cav. Long-flowered 

 Tobacco. Fig. 3732. 



Nicotiana longiflora Cav. Descr. PI. 106. 1802. 



Annual, minutely rough-puberulent and viscid; stem 

 erect, slender, branched, ii-3 high. Basal leaves 

 ovate-lanceolate or broadly oblanceolate, obtuse, 6'-io' 

 long, I '-3' wide, tapering into slender winged petioles; 

 stem-leaves linear or lanceolate, sessile, 2'-^' long; 

 flowers in terminal racemes, short-pedicelled, 4'-6' long ; 

 calyx oblong, pubescent, its narrow lobes nearly as long 

 as the tube; corolla white or purplish, viscid, the tube 

 slender, i"-ii" in diameter, expanding above, the lobes 

 ovate-lanceolate, acute; capsule oblong. 



Near Harrisburg and Easton, Pa. Escaped from gar- 

 dens. Native of South America. Aug.-Oct. 



12. PETUNIA Juss. Ann. Mus. Paris 2: 215. 



pi. 47. 1803. 



Viscid-pubescent annual or perennial branching herbs, 

 with entire leaves, and axillary or terminal solitary white 

 violet or purple flowers (in cultivation sometimes variegated). Calyx deeply 5-cleft or 

 S-parted, the segments narrow. Corolla funnelform or salverform, the limb plicate, spread- 

 ing, slightly irregular. Stamens 5, inserted on the throat of the corolla, 4 of them didy- 

 namous, perfect, the fifth smaller or obsolete; filaments slender; anthers ovoid, 2-lobed. 

 Disk fleshy. Ovary 2-celled; ovules numerous in each cavity; style filiform; stigma 2-lamel- 

 late. Capsule 2-celled, 2-valved, the valves entire. Seeds small, the testa rugose. [Petun, 

 an Indian name of tobacco.] 



About 12 species, natives of South America. Type species: Petunia parviflora Juss. 

 Corolla white, its tube cylindric. i. P. axillaris. 



Corolla violet-purple, its tube campanulate. z. P.violacea. 



i. Petunia axillaris (Lam.) B.S.P. White 

 Petunia. Fig. 3733. 



Nicotiana axillaris Lam. Encycl. 4: 480. 1797. 

 Petunia nyctaginiflora Juss. Ann. Mus. Paris, 2: 215. 



pi. 47- / 2. 1803. 

 Petunia axillaris B.S.P. Prel. Cat. N. Y. 38. 1888. 



Very viscid; stem stout, about i high. Leaves 

 ovate to obovate, obtuse or blunt-pointed at the 

 apex, sessile, or the lower narrowed into short mar- 

 gined petioles, 3'-4' long, i'-2 r wide; peduncles 

 slender, 2.'-$' long, often longer than the leaves ; 

 calyx-segments linear-oblong, obtuse; corolla white, 

 its tube cylindric, slightly enlarged above, i'-ii' 

 long, 3-4 times as long as the calyx, its limb about 

 2' broad, the lobes rounded. 



In waste places, escaped from gardens, southern New 

 York and Pennsylvania. Native of Brazil. July-Sept. 



2. Petunia violacea Lindl. Violet Petunia 

 Fig- 3734- 



Petunia violacea Lindl. Bot. Reg. pi. 1626. 1833. 



Similar to the preceding species, but usually 

 rather lower, and the stem slender. Leaves ovate 

 or obovate, all but the uppermost petioled, mostly 

 obtuse, i'-2i' long; peduncles slender, i'-2' long; 

 calyx-segments linear, subacute, or obtuse ; co- 

 rolla violet-purple, its tube campanulate, 9"- 15" 

 long, the limb less abruptly spreading, i'-ii' 

 broad, the lobes subacute. 



In waste places, escaped from gardens, southern 

 New York and Pennsylvania. Native of southern 

 Brazil and Paraguay. June-Sept. 



Petunia parviflora Juss., a prostrate pubescent 

 annual, with small linear to spatulate leaves, and a 

 funnelform corolla 4"-s" long, has been found on 

 ballast about the eastern seaports, from South 

 America. 



