GAURA, ONAGRACEA., 237 
HETEROGAURA. 
often broadly toothed; anthers all perfect; filaments with hairy scales at 
the base: stigma-lobes short: capsule 8-12 lines long, 4-angled, nearly 
glabrous, on pedicels about a line long; seeds obliquely cubical, sparingly 
hispid. Washington to California. 
14 GAURA L. Gen. n. 470. 
Herbs with mostly sessile alternate leaves and numerous white 
or rose-color flowers in spikes or racemes. Calyx-tube prolonged 
beyond the obconic or clavate ovary ; the 4-parted limb deciduous. 
Petals 4 with claws. Stamens 8, nearly equal; filaments fur- 
nished with a scale-like appendage on the inside next the base; 
anthers oval, versatile. Ovary 4 celled: ovules 1-2 in each cell, 
pendulous: style filiform, hairy below : stigma 4-lobed, surrounded 
by an obscure ring or indusium. Fruit nut-like, indehiscent or 
eee at the apex, obtusely 4-angled and ridged upon the 
sides. 
G. parviflora) Dougl. Hook Fl. i, 208. Stems erect, 2-5 ft. high, 
sparingly branched softly white-pubescent and minutely glandular; leaves 
ovate-lanceolate, acute or acuminate, repand-denticulate, velvety pubescent 
on both sides, 1-3 inches long, the uppermost smaller; spikes virgate 
strict, very many flowered, much elongated in fruit, bracts lanceolate, 
sutulate; petals spatulate, oblong, shorter than the calyx, segments, rose- 
color ; fruit sessile, oblong-clavate, 4-nerved, 4-angled at the apex, about 
2-seeded. Washington to California and east to arkansas. 
15 HETEROGAURA Rothrock Proc. Am. Acad. vi, 354. 
Annual herbs with alternate leaves and small flowers in termi- 
nal racemes. Calyx-tube with a short obconic prolongation 
above the small ovary; limb 4-cleft, spreading, deciduous.’ Pet- 
als 4, entire, with claws. Stamens 8; filaments naked; anthers 
ovate-cordate, attached by the base and not versatile; those op- 
posite to the petals on shorter filaments, lanceolate, acute, ster- 
ile. Ovary 4-celled, with a solitary pedulous ovule in each cell: 
style long: stigma discoid, entire. Fruit nut-like, indehiscent, 
obovoid, 2-4-celled, 1-2-seeded. 
H. Californica Rothr.1] c. Smooth or sparingly puberulent, 12-18 
inches high, leaves lanceolate, entire, 1-2 inches long, tapering to a slen- 
der petiole: petals purple, narrowly spatulate; 2 lines long: anthers very 
- small: fruit 2 lines long, obovate, 4-angled, 14% lines long, smooth, ona 
short spreading pedicel. Southern  regon (Evans (reek, Jos. Howell: to 
California. 
16 CIRCAEA L. Gen. n. 24. 
Low perennial herbs with thin opposite petioled leaves and 
small white flowers in terminal and lateral racemes, the fruit on 
slender spreading or deflexed pedicels. Tube of the calyx 
slightly produced beyond the ovary; the free portion nearly 
filled with a cup-shaped disk, deciduous; the limb 2-parted. Pet- 
als 2, obcordate. Stamens 2,alternate with the petals: filaments 
filiform: anthers short. Style filiform: stigma somewhat capi- 
tate marginate. Capsule obovate, 1-2-celled, at length 2- 
