EVENING-PRIMROSE FAMILY 211 



1. Gaura parviflora Dougl. Small-flowered Gaura. Fig. 3453. 



Gaura parviflora Dougl. ex Hook. Fl. Bor. Amer. 1: 208. 1834. 



Erect biennials, 5-20 dm. tall, simple or with few erect branches, silky-pilose, with long 



spreading hairs on stems, veins and leaf-margins, as well as with minute, close-set, glandular 



pubescence. Leaves ovate-lanceolate, almost sessile, repand-dentate to subentire, 3-10 cm. long, 



1-3 cm. wide, the general leaf-surface finely pubescent ; leaves of inflorescence mostly reduced 



to minute linear bracts ; spikes 1-3 dm. long ; flowers numerous, quite glabrous ; hypanthium 



2 mm. long ; sepals 2-3 mm. long ; petals 2-4 mm. long, reddish ; fruit fusiform, 6-8 mm. long, 



almost equally 8-ribbed, quite glabrous ; seeds brown, 1 mm. long. 



Disturbed and waste places, Transition Zone; eastern Washington to eastern Oregon and the Mississippi 

 Valley. Type locality: "sandy banks of the Walla-wallah River." June— Aug. 



2. Gaura coccinea (Nutt.) Pursh. Scarlet Gaura. Fig. 3454. 



Malva coccinea Nutt. ex Eraser's Cat. no. 51. 1813. 

 Gaura coccinea Pursh, Fl. Amer. Sept. 2: 733. 1814. 



Stems several to many, branched so as to form a bushy plant, 1-S dm. tall, perennial, usually 

 strigose-canescent. Leaves numerous, sessile, oblong-lanceolate to linear, entire to repand- 

 dentate, sessile, acute to obtuse, 1-3 cm. long, 3-10 mm. wide ; floral bracts linear to lanceo- 

 late, 3-6 mm. long, persistent; spikes short, 1-2 dm. long; hypanthium 6-10 mm. long; sepals 

 6-9 mm. long ; petals pink or red, turning scarlet, 5-8 mm. long ; stamens equal, almost as long 

 as petals ; pistil about same length ; fruits canescent, short-obovoid, 4-angled in upper half, 5-7 

 mm. long ; seeds 2 mm. long. 



Dry slopes, Upper Sonoran Zone; Providence Mountains, San Bernardino County, California, to South Da- 

 kota and Texas. Naturalized at Brea, southern California. Type locality: "Upper Louisiana," collected by Brad- 

 bury. April-June. 



Gaura coccinea var. glabra (Lehm.) Torr. & Gray, Fl. N. Amer. 1: 518. 1840. {Gaura glabra Lehm. in 

 Hook. Fl. Bor. Amer 1 : 209. 1834.) Plant nearly or quite glabrous on stem and leaves; leaves as in the species 

 but more wavy; hypanthium strigillose. Montana southward to the eastern Mojave Desert. California, and Ari- 

 zona and eastward to Nebraska and Texas. Type locality: "About Carlton-House on the Saskatchawan." 



Gaura sinuata Nutt. ex Ser. in DC. Prod. 3: 44. 1828. Glabrate, branched in lower portion; leaves 2-S 

 cm. long, oblanceolate to oblong-linear, sinuate-dentate; floral bracts lanceolate to ovate with narrow tip, cadu- 

 cous; spikes on long naked peduncles; flowers quite large; petals white becoming red, 6-8 mm. long. Native of 

 Texas and adjacent regions; occasionally naturalized in California, in San Mateo County and in southern Cali- 

 fornia. Type locality: "In Arkanza et Red-River." 



Gaura villosa Torr. Ann. Lye. N.Y. 2: 200. 1828. Perennial soft-villous with long hairs; petals white, 



becominsf red. about 8 mm. long; floral bracts ovate to ovate-lanceolate, caducous; stipe-like liase of fruit 3-6 mm. 

 long. Kansas to Texas and New Mexico. Locally established in Los Angeles County, California. Type locality: 

 "Sources of the Canadian." 



Gaura odorata Sesse ex Lag. Gen. & Sp. PI. 14. 1816. Winter annual or biennial with short-hairy 

 stems; sepals 10-13 mm. long; petals white or pink, becoming red, 7-8 mm. long; floral bracts lance-ovate, cadu- 

 cous. Texas to central Mexico. Locally established in southern California from Ventura County to San Diego 

 County. Type locality: "Hab. in N.[ova] H.[ispania]." 



11. HETEROGAURA Rothrock, Proc. Amer. Acad. 6: 350. 1864. 



Caulescent annual herbs. Leaves alternate. Flowers pink, in terminal spicate racemes. 

 Hypanthium short, obconic ; sepals 4, deciduous. Petals 4, clawed. Stamens 8, erect, the 

 4 epipetalous ones sterile ; filaments not appendag-ed. Stigma discoid, entire, without any 

 basal cup-like border. Ovary 4-cened, with 1 ovule in each cell. Fruit 2-4-celled, 1-2- 

 seeded. [Name Greek, different, and Gaura.'] 



A monotypic genus found only in California. 



1. Heterogaura heterandra (Torr.) Coville. California Gaura. Fig. 3455. 



Gaura heterandra Torr. Pacif. R. Rep. 4: 87. 1857. 



Heterogaura calif arnica Rothrock, Proc. Amer. Acad. 6: 354. 1864. 



Heterogaura heterandra Coville, Contr. U.S. Nat. Herb. 4: 106. 1893. 



Annual, stem erect, simple or paniculately few-branched, 1-4 dm. tall, minutely puberulent 



throughout. Leaves oblong-ovate to lanceolate, entire to remotely and shallowly denticulate, the 



blades 2—5 cm. long, about half as wide, on petioles 5-10 mm. long; pedicels 1-1.5 mm. long; 



hypanthium 2-3 mm. long ; sepals about the same ; petals pink, becoming lavender, spatulate, 



3-5 mm. long ; alternate stamens fertile, 2 mm. long, opposite ones sterile, 1 mm. long ; capsule 



ridged, often triquetrous, 3 mm. long; seeds slender, 2 mm. long. 



Shaded slopes at 1,500-3,000 feet altitude, Upper Sonoran Zone; western base of the Sierra Nevada from 

 Placer County to San Bernardino County, California. Type locality: "Mokelumne Hill," California. May-June. 



12. CIRCAEA L. Sp. PI. 9. 1753. 



Low, slender perennial herbs with subterranean rootstocks. Leaves opposite, thin, 

 petioled. Flowers small, paniculately disposed in racemes. Hypanthium short, deciduous 

 and with a ring-like disk within; sepals 2, reflexed. Petals 2. white, notched. Stamens 2, 

 alternate with the petals. Ovary 1-2 celled, each cell 1-ovuled. Fruit nut-like, 1-2-seeded, 

 obovoid, indehiscent, usually with hooked hairs. [Named for Circe, the enchantress.] 



A genus of about 8 species, from the northern hemisphere. Type species, Circaea lutetiana L. 



Plant 1-3 dm. tall; leaves cordate, sharply and coarsely dentate. 1. C. alpina. 



Plant 3-6 dm. tall; leaves usually rounded at base, sinuately denticulate. 2. C. pacifica. 



