STANDLEY FLORA OF GLACIER PARK. 381 



6. Epilobium mirabile Trel. Frequent above timber line, on moist slopes or along 

 brooks; sometimes about snow banks at middle altitudes. Wash, and Mont.— Stems 

 10 to 25 cm. high, forming dense clumps; leaves ovate, 1 to 2 cm. long, remotely 

 toothed; petals pink, about 5 mm. long; capsule 2 to 4 cm. long. 



This species has been known pre\dously only from the original collection, from 

 Mount Rainier, Washington. A specimen collected in Glacier Park by Umbach and 

 listed by Rydberg under E. palmeri Hydh. belongs here. 



7. Epilobium platyphyllum Rydb. Occasional at low or middle altitudes, on moist 

 slopes or on lake beaches or sandbars. , B. C. to Calif., Utah, and Mont. — Stems 10 

 to 20 cm. high, glabrous, forming dense tufts; leaves ovate, 1.5 to 2.5 cm. long, entire 

 or nearly so, glabrous; petals 4 to 5 mm. long, pink or purple; capsules glabrous, 

 3 to 5 cm. long. 



8. Epilobium alpinum L. Common above timber line, in meadows or on rocky 

 slopes; frequently found at middle altitudes, in wet thickets or on moist cliffs. 

 Alaska to Calif., Colo., S. Dak., N. H., and Greenl.; also in Eur. and Asia. — Stems 

 slender, 10 to 20 cm. high, tufted, usually glabrous; leaves ovate, 1 to 3 cm. long, 

 entire or nearly so; petals 3 to 5 mm. long; capsules 3 to 5 cm. long. 



9. Epilobium hornemannii Reichenb. Common above or near timber line, in 

 moist meadows or on slopes; occasional in wet places at middle altitudes. Alaska 

 to Calif., Colo., S. Dak., N. H., and Greenl.; also in Eur. and Asia.— Stems slender, 

 10 to 30 cm. high, tufted, finely pubescent; leaves oblong to ovate, 1.5 to 4 cm. 

 long, obtuse; capsules 3 to 5 cm. long, slender-stalked. 



A handsome plant when in full flower. 



10. Epilobium anagallidifoliuni Lam. Frequent above timber line, in meadows or 

 on rocky slopes or rock slides; sometimes in wet places at middle altitudes. Alaska 

 to Colo., Lab., and Greenl.; also in Eur. and Asia. — Stems slender, 10 to 15 cm. high, 

 minutely pubescent, tufted; leaves oblong to ovate, 1 to 2 cm. long, obtuse, entire 

 or nearly so; capsules 2 to 4 cm. long, slender-stalked. 



11. Epilobium clavatum Trel. Occasional above timber line, in meadows or on 

 slopes; sometimes in wet places at middle altitudes. B. C. and Alta. to Colo.— 

 Stems slender, about 10 cm. high, nearly glabrous, tufted; leaves oval or ovate, 

 obtuse, 1 to 2 cm. long, entire or nearly so; capsules 2 to 3 cm. long, slender-stalked. 



3. TARAXIA Nutt. 



1. Taraxia breviflora Nutt. Low places on prairie near east entrance. B. C. and 

 Alta. to Utah. {Oenothera breviflora Torr. & Gray.)— Steml ess perennial; leaves 

 spreading upon the ground, 5 to 10 cm. long, lobed, finely hairy; petals yellow, 

 5 mm. long; capsule roughened, 1.5 cm. long. 



4. LAVAUXIA Spach' 



1. Lavauxia flava A. Nels. East entrance, on prairie, Umbach. Wash, to Calif., 

 N. Mex.. and Nebr. — -Stemless perennial, nearly glabrous; leaves oblanceolate, 

 10 to 20 cm. long, lobed, at least near the base; flowers sessile; petals 1.5 to 2 cm. 

 long, yellow, turning pink; capsule 2 to 3 cm. long. 



5. PACHYLOPHUS Spach. 



1. Pachylophus caespitosus (Nutt.) Raim. Prairie eveninct-primrose. East 

 entrance, on shale slopes or prairie. Sask. to Utah, N. Mex., and Nebr. {Oenothera 

 caespitosa Nutt.) — Perennial, stemless or nearly so, forming dense tufts, glabrous; 

 leaves oblanceolate, 10 to 20 cm. long, toothed; petals 3 to 4 cm. long, white, turning 

 deep pink; capsule about 3 cm. long. 



The flowers open in the evening and close in the morning; they are verj^ showy. 



