N.M. (Dona Ana, San Juan, Colfax and Bernalillo cos.) and Ariz. (Navajo, Coco- 

 nino, Graham and Gila cos.), July-Oct.; Nev. and s. Ut. to Tex. and Chih. 



10. Oenothera Jamesii T. & G. 



Robust erect densely appressed-pubescent biennial to 2 m. tall; leaves elliptic to 

 broadly lanceolate, appressed-pubescent; rosette leaves narrower near the base, 

 sinuate-pinnatifid to denticulate, 6-20 cm. long and 2-4 cm. wide, their petioles 

 2-6 cm. long; cauline leaves denticulate, 5-12 cm. long and 2-3.5 cm. wide, short- 

 petioled below to subsessile above; flowers opening near sunset; mature buds erect; 

 hypanthium 6-1 1 cm. long; sepals 4-6 cm. long, with free tips 3-6 mm. long; 

 petals yellow, fading reddish, 3.5-5 cm. long; capsule thick, cylindric, 2-5 cm. 

 long; seeds in 2 rows in each locule, 1.5-2 mm. long. 



On stream banks in wet places, scattered, in Okla. (Waterfall) and in the Tex. 

 Edwards Plateau and Llano area w. to the Trans-Pecos, July-Oct.; Okla. and w. 

 Tex. to Coah. 



11. Oenothera longissima Rydb. 



Biennial to short-lived perennial, simple to branched, erect, 1-3 m. tall, more or 

 less hirsute (especially above), somewhat muricate on the stems, the hair mostly 

 appressed, upper parts also glandular-pubescent; leaves of rosette oblanceolate; 

 blades 1-2 dm. long, 1.5-3 cm. wide, with winged petioles 5-10 cm. long; cauline 

 leaves linear-lanceolate, plane, stiffly spreading-ascending, gradually reduced 

 upward to sessile lanceolate bracts soon exceeded by buds; flower tube 8-12 cm. 

 long, more or less reddish; sepals 3.5-4.5 cm. long, the tips 3-5 mm. long; petals 

 obovate, about 4 cm. long; anthers 14-18 mm. long; capsules subquadrangular, 

 3.5-4.5 cm. long, about 5 mm. thick; seeds 1-1.5 mm. long. 



In wet springy places, in Ariz. (Navajo, Coconino and Mohave cos.), July-Sept.; 

 also Ut., Nev. and Calif. 



The typical plant has pubescence ashy-strigose, stems not muricate and inflores- 

 cence not glandular-pubescent. 



Subsp. Glutei (A. Nels.) Munz has pubescence more or less hirsute (especially 

 above), stems somewhat muricate and inflorescence glandular-pubescent. 



4. Circaea L. Enchanter's Nightshade 

 About 7 species in North America and Eurasia. 



1. Circaea alpina L. 



Perennial from slender rootstocks, 1-5 dm. tall, simple to freely branched, clear 

 green; stems usually glabrous on the lower half, often sparsely strigose to short- 

 pilose above and in the inflorescence; leaves opposite, thin, with petioles somewhat 

 shorter than blade, cordate-ovate to ovate, usually acuminate, 2-6 cm. long, sub- 

 entire to saliently dentate, sparsely to rather thickly strigillose (especially on lower 

 surface); racemes often with 1 or 2 linear bracts at the base, the small individual 

 flowers (1-1.5 mm. long) with a minute sometimes glandlike bractlet; pedicels 

 spreading to erect in flower, becoming reflexed and equaling or slightly exceeding 

 the fruit; hypanthium short, deciduous and with a ringlike disk within; sepals 2, 

 reflexed; and petals 2, white, notched; stamens 2, alternate with petals; fruits tur- 

 binate, nutlike, 1- or 2-seeded, obovoid, indehiscent, usually with hooked hairs, 

 about 2 mm. long. C. pacifica Asch. & Magn. 



Moist or wet woods and mossy bogs, in mts. of N. M. (Socorro Co.), and Ariz. 

 (Apache, Coconino and Graham cos.); Nfld. to Alas., s. to N.Y., Tenn., N.C., Ind. 

 and S.D. to N.M., Ariz, and Calif. 



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