248 ONAGRACEAE. 



Stems tall, 30-90 cm. high. 



Petals 6-10 mm. long; herbage canescent- 



puberulent. E. franciscanum. 



Petals 3-5 mm. long; herbage not canes- 

 cent-puberulent. 

 Capsule sessile; leaves ovate or elliptic, 



sessile. E. hrevistylum. 



Capsule pedicelled; leaves ovate- or 

 oblong-lanceolate. 

 Pedicels shorter than the capsules; 



leaves ovate-lanceolate, petiolate. E. adenocaulon. 

 Pedicels equalling the capsules; 



leaves oblong-lanceolate, sessile. E. halleanum. 

 Stems low; species mostly alpine or subalpine. 

 Seeds smooth; plants creeping or stoloni- 

 ferous. 

 Leaves or some of them toothed, thin. E. alpinum. 

 Leaves entire. 



Stems ascending, usually curved; 

 leaves spreading, oval or oblong, 



thick. E. anagallidifolium. 



Stems erect; leaves ascending, lin- 

 ear or oblong-lanceolate. E. oregonense. 

 Seeds papillate. 



Foliage glaucous and glabrous. E. fastigiattim. 



Foliage not glaucous. 



Plants producing stolons. 



Matted; leaves firm, pale, green, 



sessile. E. clavalum. 



Not matted; leaves thin, bright 



green, petiolate. E. alpinum. 



Plants not producing stolons. 



Stems simple. E. delicatum. 



Stems branched. 



Seeds 2 mm. long; stems 

 pubescent but not in lines; 

 pedicels much shorter than 

 the capsules. E. mirabile. 



Seeds 1 mm. long; stems 

 pubescent in lines; pedicels 

 about as long as the cap- 

 sules. E. leptocarpum. 



Epilobium angustifolium L. Fireweed. Perennial, erect, about 1 m. high, 

 glabrous or puberulent; leaves numerous, lanceolate, acute, entire, or denticu- 

 late, nearly sessile, 8-16 cm. long; lateral veins confluent at the margin; 

 raceme erect, many-flowered, 20-40 cm. long; flowers rose-colored, 2-3 cm. 

 broad; pedicels slender, exceeding the narrow bracts; petals obovate, entire, 

 clawed; stigma 4-lobed; capsules spreading, linear, canescent, 5-10 cm. long. 



In open woods, abundant, especially in " burns." 



Epilobium latifolium L. Stems 10-20 cm. high; leaves alternate, ovate- 

 lanceolate, usually entire, thick; flowers large, purple, in a short raceme. 

 In the mountains in wet places, at about 2000 m. altitude. 



Epilobium luteum Pursh. Nearly glabrous; stems 20-40 cm. high; leaves 

 opposite, elliptic or ovate, dentate, mostly sessile; flowers rather large, pale 

 yellow. 



Common along mountain streams. 



