RVDBEKG : ROCKV MOUNTAIN FLORA 567 



the seeds, which are apparently smooth, the fine murication being 

 seen only under a strong lens. A. gracilis grows in sandy soil, 

 on hillsides and in river bottoms at an altitude of 1,500—2,500 m. 



Colorado: Foothills, Larimer County, 1895, y. H. Co%ven 

 (type); Ridge below Tobe Miller's, Coivcii ; Salida, 1898, Baker, 

 Earlc &• Tracy i ^ (in part) ; mesas near Pueblo, 1900, Rydbcrg &- 

 Vreelaiid 386^. 



Wyoming : Fort Steele, 1901, Tivecdy 437 j and ^j^-f. 



Idaho: Common, \'ic)2, Isabel Mnlford. 



"Oregon" : Nuttall's specimens of Trachyphytiiin gracile. 



Acrolasia latifolia sp. nov. 



Stout annual, 3-5 dm. high, branched ; leaves sessile, ovate or 

 ovate-lanceolate, coarsely toothed or entire, 5—10 cm. long, 2—3 

 cm, wide; sepals lanceolate, 2.5-3 mm. long; petals obovate- 

 spatulate, about 5 mm. long; capsule linear, cylindric, 2.5-3 cm. 

 long, about 2.5 mm. thick, sessile; seeds prismatic, muriculate. 



This has been mistaken for A. integrifolia on account of its 

 broad, merely toothed leaves, but the sepals and seeds place it in 

 the A. albicaulis group and nearest the preceding and A. cteno- 

 pliora. It grows on hills at an altitude of 1,200—2,400 m. 



Colorado : Mountains between Sunshine and Ward, 1902, 

 Tiveedy 514^ (type); Boulder, 1901, Osterhont 2471 ; Larimer 

 County, 1895, Cozven. 



Epilobium ovatifolium sp, nov. 



Plant 2-6 dm. high, propagating by turions ; stem glabrous 

 except the decurrent lines which are more or less crisp-hairy, 

 especially above ; leaves sessile or nearly so, ovate or ovate-lan- 

 ceolate and acute, or the lowest oval and obtuse, 3-4 cm. long, 

 entire or denticulate, glabrous ; petals purple or rarely rose, 5—7 

 mm. long; pods 5-6 cm. long, i>. 5-2 mm. in diameter, sessile, 

 more or less crisp and glandular hairy ; seed a little over i mm. 

 long, abruptly contracted above, but without neck ; coma white, 

 about 6 mm. long. 



The type specimens are labeled E. Horneniafinii Reichenb. 

 which it resembles somewhat in general habit ; but that species 

 propagates in an altogether different way and the leaves are more 

 or less petioled. The present species is more closely related to 

 E. brevistylnui and E. glandulosuni. It differs from the former 



