919 
$. I. EuPHysaris. Flowers yellowish, often with a dark cen- 
ter, limb only slightly 5-lobed, pentagonal in outline; lobes of 
the distinctly ribbed fruiting calyx much shorter than the tube. 
A. Annuals. 
a. PLANTS MORE OR LESS PUBESCENT (EXCEPT P. Barbadensis obscura). 
I. Fruiting calyx sharply 5-angled, more or less acuminate at the summit and sunken 
at the base; calyx-lobes (at flowering d lanceolate or acuminate, as long as 
the tube or lon 
aa. Calyx-lobes ending in a subulate acumination. 
Leaves broadly oval or round, sinuately dentate; calyx in fruit not unusually firm. 
1. P. subulata. 
66, Calyx-lobes narrow, but not with a subulate tip. 
Leaves ovate, oblique, acute or acuminate, subentire at the base ; upper part repand or 
subentire ; fruiting calyx small and short; stem slender, diffuse, sharply angle 
2. P. pubese 
Leaves generally very oblique, cordate, strongly sinuately toothed to the "rds stem 
stout, generally erect, obtusely angled ; fruiting calyx more rounded. 
i u Mp os. 
Leaves orbicular or broadly ovate, sinuately crenate, at the base scarcely — and 
scarcely oblique ; stem very stout and strict; fruiting calyx broadly cordat 
> UL Veo 
WEE 
lids cordate, scarcely oblique, more or less abruptly acuminate, acutely repand den- 
tate; stem tall and erector widely spreading, acutely angled; fruiting di larger, 
long-acuminate. 5. P. Barbadensis. 
IL Fruiting calyx obtusely or indistinctly 5-10-angled; calyx-lobes (at flowering 
time) triangular to lanceolate, generally shorter than the tube, except sometimes 
in Z, Carpenteri. 
. Leaves not long-acuminate. 
Peduncles very short, inier than the fruiting calyx; leaves ovate, more or less 
sinuately dentate. ` 6. P. Lagascae. 
Peduncles 2-3 cm. long, longer than the fruiting calyx; leaves deltoid- ncm sub- 
tire. 7, 4 OP 
bb. Leaves with long acumination, subentire. 
Reime much shorter than the fruiting "ins flowers solitary, 4-6 mm. in diam- 
r; fruiting calyx 2-3 cm. long. 8. P. leptophylla. 
done about the length of the fruiting ue or longer; flowers often in fascicles 
of 2-4, about 1 cm. in diameter; fruiting calyx 1-2 cm. long. 9 Z. Carpenteri. 
4. PLANTS GLABROUS OR THE UPPER PART SPARINGLY BESET WITH SHORT HAIRS OR 
IN Z. ixocarpa SOMETIMES A LITTLE PUBERULENT WHEN YOUNG. 
III. Fruiting calyx obtusely 5-1o-angled, not sunken at the base; corolla yellow, 
sometimes with the center a little darker but never brown or purple. 
a. Peduncles generally much longer than the fruiting calyx. 
Corolla rotate-campanulate, white or cream color, 10-20 mm. in diameter, leaves 
10. P. Wrightii 
sinuately tcothed. 
