300 
pedicels filiform: fruiting calyx 12mm. long, nearly filled by the berry.—South. 
western Texas, on prairies of the San Pedro ( Wright). 
++ Corolla lurid greenish-white or yellow, mostly darker-colored or brownish at center. 
++ Annuals, glabrous or nearly so: pubescence (ifany) minute and neither viscid nor stellate: 
anthers violet, 
= Corolla 6 to 12mm. broad: berry greenish-yellow. 
3. P.obscura Michx. Branches widely diffuse: leaves broadly deltoid-ovate, mostly 
with truncate or subcordate base, unequally dentate, abruptly acuminate, 3.5 to 7.5 
cm. long: slender pedicels about 12 mm. long: corolla pale yellow with a dark eye: 
calyx-lobes lanceolate-subulate: fruiting calyx with 5 strong keeled angles and 5 
much less distinct intermediate nerves.—Near Houston (Hall). 
4. P. angulata L. Erect, or at length declined or spreading: leaves mostly ovate- 
oblong, with somewhat cuneate base, coarsely and laciniately toothed, 5 to 12.5 em, 
long: slender pedicels 25 mm, or more long: corolla greenish-white or yellowish, with 
no distinct eye: calyx-lobes triangular: fruiting calyx 10-angled, the 5 principal 
ones sharply keeled.--Extending from Atlantic region to southern Texas. 
5. P. equata Jaeq. f. Erect, much branched, the younver stems and branches a 
little hairy: leaves ovate or oblong, repand or sinuate-toothed, 2.5 to 5em. or more 
long: pedicels very short, 2 to 4mm. long: corolla light yellow with a brownish eye: 
calyx-lobes short and broadly ovate-triangular: fruiting calyx about equally 10- 
nerved.—-Waste grounds, southern and western Texas. 
==== Corolla 14 to 25 mm, broad: berry reddish or purple. 
6. P. Philadelphica Lam. Erectstem and branches angled, 6 to 9dm. high: leaves 
obliquely ovate or oblong, repand-angulate and sometimes few-toothed, 5 to 10 em, 
long: corolla greenish or yellowish with a dark eye: calyx-lobes broadly ovate or 
triangular: fruiting calyx globular.—In fertile soil, extending from the Atlantic 
region into Texas. 
++++ Annuals or perennials, strong-scented, villous or pubescent with viscid or glandular 
simple hairs: fruiting calyx d-angled and keeled: berry green at length yellow : leares 
ovate or cordate. 
= Root annual: anthers violet. 
7. P. pubescens L. Diffusely much branched or at length decumbent: leaves 
angulate- or repand-toothed or nearly entire: corolla spotted with brown purple at 
center, 10 to 12 mm. broad, obscurely 5 or 10-toothed.—Low grounds, throughout 
southern Texas. 
== = Perennial: anthers mostly yellow. 
8 P, Virginiana Mill. Diffusely much branched and widely spreading, or at 
first erect, pubescent or hirsute-villous: leaves sometimes oblong, repand or obtusely 
toothed, rarely entire: corolla 18 to 25mm. broad, 5-angled or 5 or 10-toothed, dull 
sulphur-yellow with a brownish center: pedicels 12 to 25 mm. long. (P. viscosa 
Gray, Man., not L.)—Light or sandy soils, extending from the Atlantic States into 
Texas. 
9. P. hederzfolia Gray. Erect or at length diffuse, densely viscid-pubescent or 
on young parts more or less villous: leaves roundish-cordate or almost reniform, or 
sometimes ovate, coarsely and obtusely angulate-toothed, 18 to 36 mm. in diameter: 
corolla 12 mm. broad: pedicels 4 to 8 mm. long.—Rocky hills, southwestern Texas. 
At the western borders of Texas is var, PUBERULA Gray, with short minutely glan- 
dular less viscid pubescence, stems inclined to be procumbent, and smaller leaves. 
++ ++ ++ Perennials, not viscid, mostly low: anthers almost always yellow. 
== Pubescence stellular or branching: leaves ‘all or most of them cordate or ovate with 
abrupt base. 
10. P. mollis Nutt. Softly cinereous-tomentose or canescent throughout with 
stellate or many-branched woolly hairs: leaves varying from ovate (or some of the 
