SOLANACEAE 167 



Leaves not hairy. 5. P. aubglabrata. 



Leaves more or less hairy. 

 Leaves entire. 

 Pubescence sparse, not branching. 6. P. lanceolata. 



Pubescence heavy, branching. 7. P. pumila. 



Leaves sinuate-dentate. 

 Pubescence sparse. 8. P. Virginiana. 



Pubescence strong and dense. 9. P. heterophylla. 



1. P. pubescens L. Stems slender, ascending, villous-pubescent, 

 branching from the base, G'-IS' high : leaves ovate, oblique at base, 

 nearly entire : fruiting calyx acuminate, sharply 5-angled. — In low sandy 

 woods along the Missouri River. Uncommon. July-September. 



2. P. pruinosa L. Stems stout, the branches prostrate and widely 

 spreading, strongly pubescent : leaves ovate : fruiting calyx resembling 

 the last. — In waste places, usually in hog-lots, Martin City, Sibley, Graia 

 "Valley, Sheffield, Independence. June-October. 



3. P. Barbadensis Jacq. Resembles No. 1 but is stouter : stems erect, 

 branching above : leaves repand-dentate : fruiting calyx long acuminate.. 

 — In sandy woods along the Missouri River. Uncommon. July-Sep- 

 tember. 



4. P. Missouriensia Mackenzie & Bush, n. sp. Stems 6'-18' high, 

 viscid-pubescent : leaves ovate, sinuate-dentate, strongly oblique at base : 

 flowers Z"-i" broad : calyx lobes triangular : anthers purplish : fruiting 

 calyx ovoid, indistinctly angled, sunken at base : berry very glutinous. — ■ 

 Rather common on rocky hillsides. June-September. This is P. Laga- 

 scae Rydb., Vol. III., Britton and Brown, 111. Flora, 125, not P. Lagascae 

 R. &S. 



5. P. aubglabrata Mackenzie & Bush, n. sp. l°-2° high, nearly gla- 

 brous throughout : leaves ovate-lanceolate, slightly sinuate-dentate t 

 corolla 10" broad, yellow with a dark center : anthers purplish : fruiting 

 calyx 10-angled, sunken at base, acuminate. — Common in waste places. 

 May-September. ( Has been referred to P. Philadelphica Lam. ) 



6. P. lanceolata Michx. S'-IS' high, spreading : leaves oblanoeolate 

 to spatulate : corolla 8" wide, with a dark center : fruiting calyx scarcely 

 angled, not sunken at the base. — Sparingly adventized at Sheffield. 

 May-June. 



7. P. pumila Nutt. l°-2° high, erect : leaves ovate to oblong-lanceo- 

 late : corolla 8" wide, with a dark center : fruiting calyx angled, sunken 

 at base. — Common on prairies and barrens in the southern part. May- 

 July. 



8. P. Virginiana Mill. l°-2° high, more or less hairy : leaves ovate- 

 lanceolate, from strongly toothed to nearly entire: corolla 10" wide, 

 with a dark center: fruiting calyx sunken at base, 5-angled. — Frequent 

 in barrens throughout, especially in the southern part. May-June. 



9. P. heterophylla Nees. 6'-3° high: leaves large, ovate, cordate, 

 more or less sinuately toothed : corolla about 10" wide, with a dark cen- 



