CEnothera. ONAGRACE^. 223 



Canescently puberalont, slender : leaves nearly entire : capsule 



„. . ,/eiy slender, not attenuate upward. 17. (E. alyssoides. 



Viscidly i)ubescent : leaves denticulate : capsule attenuate from 



the base. 18. (E. Boothii. 



t.labrous : stem white and shining : spike nearly erect • capsule 



attenuate from the base. 19. (j,-. gaur.eflora. 



* * * * Capsule pedicellate, linear or somewhat clavate, obtuse, not contorted : otherwise as 



in the preceding. 

 Flowers in a nearly naked raceme : calyx-tube funnelform. 

 Leaves all near the base, usually lyrate. 



Puberulent or nearly glabrous : calyx-tips not free : capsule an • 



inch long or less. 20 (E scapoidea 



Villous : calyx-tips free, stout : capsule 1 to 3 inches long. 21 ' (e' bi-evipfs " 



Leaves scattered, cordate or ovate : calyx-tube long-funnelform ; 



Flowers with leafy'bracts, very small : calyx-tube obconic : seeds ^^' ^' ''•'•'^*'^''"^'^^^^- 



with involute margins : dwarf, slender. 23. CE. PTEiiosPEitMA. 



§ 1. Cah/x much prolonged beyond the ovary : stamens nearly equal; anthers 

 or Imear-ohlong : stigma-lobes linear: capsule coriV^ceoMS. — Eucenothera. 

 -^ Tall, erect : floivers yellow, in a leafy spihe, erect in the bud, openinq at evening • 

 tips of the calyx-lobes free : capsule narrowly oblong, sessile, straight: seeds in 2 

 rows in each cell. — Evening Primrose. 



1. (E. biennis, Linn. Bienninl, stout and usually simple, 1 to 5 feet liicrh 

 canescently puberulent and move or less hirsute : leaves lanceolate to obloncT-°or 

 rarely ovate-lanceolate, acute or acuminate, 2 to 6 inches long, repandly denticulate 

 most y sessile : calyx-tube 1 to 21 inclies long : petals 6 to 9 lines long : capsule 

 about an inch long or less : seeds oblong, with somewhat margined angles 



Var. grandiflora, Lindl. Petals as long as the calyx-tube: capsule more or 

 less pubescent. — P.ot. Peg. t. 1604. CE. grandiflora. Ait. ; Bot. Mag. t. 2068 



_ Var. hirsutissima, ( Iray. Flowers as in the last, but the ovary especially more 

 hirsute. — PL Fendl. 43. CE. Hookeri, Torr. & Gray, Fl. i. 493. 



From Oregon to the Atlantic and from British America to Mexico ; forms of it are also widelv 

 naturaized in Europe (where it has long been cultivated), as well as in S. Africa, India and 

 Australia. The var. hirsuhssmui is the more common form in California, ranging to New ilexico 

 the others being more prevalent east of the Sierra Nevada. 



-^ % Usually low: stems ivhite : flowers large, white becoming pinJcish, axillary, nod- 

 ding in bud, opening by day : capsules long and narrow, sessile, often curved: seeds 

 in a single row m each cell, ascending. 



2. CE albicaulis, Nutt. Glabrous or puberulent : stems herbaceous, from a 

 perennial subterranean running rootstock, erect, h to 4 feet high, simple or branched • 

 leaves linear to olilong-lanceolate, sessile or attenuate at base or abruptly petioled, 

 entire or repand-denticulate or sinuate-pinnatitid toward the base, 1 to 3 inches 

 long : tips of the calyx-lobes free in the bud ; the tube an inch long or less : petals 

 about as long as the tube, entire or emarginate : capsule an inch or two lon<r not 

 broader at base: seeds narrowly oblong, terete, a line long. — Engelm. in Am.'^Jour 

 bci. 2 ser. xxxiv. 334. (E. pallida, Dougl. ; Lindl. Bot. Peg. t. 1142. 



A variable species, common eastward of the Sierra Nevada, ranging from Washington Territory 

 to the Saskatchewan and southward to the Mexican boundary. 



3 CB. Californica, Watson. Hoary-pubescent and more or less villous : stems 

 herbaceous from a running rootstock, decumbent, about a span long : leaves narrowly 

 oblanceolate, acuminate, mostly petioled, sinuately toothed or irregularly pinnatifid, 

 2 to 4 inches long : flowers as in the last but often larger ; the ovary and calyx vil- 

 lous, and the petals lobed with a rounded sinus : capsule 2 inches long, not tliick- 

 ened at base : seeds oblong, turgid, somewhat obtusely angled. ^ CE. albicaulis, var. 

 Californica, Watson, Proc. Am. Acad. viii. 582. 



