1913] Gates,— A New Oenothera 47 
24-26 mm. Blade long, narrow, lanceolate, narrowing gradually 
to petiole, margin repand-denticulate, sometimes very obscurely so, 
more distantly repand-dentate below; midribs pinkish, broadening 
below to a wide, long, unmargined petiole which is triangular in cross- 
section and greenish white on ventral surface. Veins on ventral 
surface of blade somewhat rugose, a very scattering, inconspicuous 
pubescence of fine, short hairs on both surfaces. 
Mature plant: — Central stem nearly two metres high, with a ring 
of ascending crown branches (arising from the rosette) which fre- 
quently reach a greater height than the central shoot. Stems terete, 
fairly stout, reddish, nearly glabrous but bearing in places a few scat- 
tered short hairs and also very scattered long hairs which arise from 
red (anthocyanic) papillae. Late in the season (in this climate), 
very slender, short, terete secondary branches appear. 
The lower cauline leaves have the same shape and other features 
as the radical leaves, but they are smaller, 25 cm. long, by 15.5 mm. 
wide, of nearly uniform width throughout the greater part of their 
length. The upper cauline leaves become gradually shorter with 
shorter petioles.  Lowermost bracts 10 cm. long by 21 mm., in extreme 
width, scarcely petiolate, lance-pointed, narrowed abruptly at base; 
upper surface and veins on lower surface bearing a few short, scattering 
hairs; margin distantly and very obscurely glandular-denticulate. 
Upper bracts shorter, broader at base, and more or less curled or 
waved. 
Flowering late in the season (nearly end of August when grown in 
the English climate as an annual). Inflorescence rather loose, tip 
of stem nutating as in O. ammophila Focke, and some forms of O. 
muricata L. 
Flowers:— Petals 20 mm. long by 19 mm. broad, emarginate, 
deep yellow, not opening out flat, style short (stigma surrounded by 
the anthers), lobes of stigma usually opening only to an angle of about 
45°. Length of hypanthium 24 mm., length of ovary 13 mm., thick- 
ness of ovary nearly 3 mm., thickness of hypanthium slightly over 
2 mm.; length of bud cone 15 mm., diameter at base nearly 5 mm., 
length of sepal tips 5 mm. Sepal tips subterminal, hence separated 
at base, nearly parallel or somewhat spreading, reddish on inner face, 
especially at base, and in young buds. Buds nearly glabrous, cone 
slightly quadrangular, reddish stripes on margins of each sepal, 
median ridge green, hypanthium usually faintly pinkish, ovary 
reddish, with scattered red papillae bearing long hairs, hypanthium 
with scattered short hairs, sepals shiny, with very scattered long and 
short hairs. 
Capsules:— Reaching 35 mm. in length, about 6.5 mm. in diameter, 
gradually tapering from near the base, green or with scattered patches 
of red, nearly glabrous, but with few, scattered long hairs, arising 
from mostly green papillae. : | 
Diagnosis: — Herba biennis. Folia radicalia longa, angustissimé 
