gaura. OXAGRACE.E. 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 ; the4-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 

 splitting 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-uenticulate, velvety pubescent 

 on both sides, 1-3 inches long, the uppermost smaller; spikes virgate 

 strict, very many flowered, much elongated in fruit, bracts lanceolate, 

 subulate; 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 1, 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 Ions, obovate, '4-angled, 1% lines long, smooth, on a 

 short spreading pedicel. Southern c regon (Evans l reek, Jos Howell to 

 California. 



16 CIRCJEA 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. St vie filiform: stigma somewhat capi- 

 tate marginate. Capsule obovate, 1-2-celled, at length 2- 



