RypBERG: Rocky 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. 
Cotorapo: Foothills, Larimer County, 1895, 7. H. Cowen 
(type) ; Ridge below Tobe Miller’s, Cowen; Salida, 1898, Baker, 
Earle & Tracy 74 (in part); mesas near Pueblo, 1900, Rydberg & 
Vreeland 5865. 
Wyominc : Fort Steele, 1901, Tweedy 2573 and 4574. 
Ipano: Common, 1892, /sabel Mulford. 
“OREGON”: Nuttall’s specimens of Zrachyphytum 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- 
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. integrifolta on account of its 
broad, merely toothed leaves, but the sepals and seeds place it in 
the 4. albicaulis group and nearest the preceding and A. cteno- 
Phora. It grows on hills at an altitude of 1,200—2,400 m. 
Cotorapo : Mountains between Sunshine and Ward, 1902, 
Tweedy 5149 (type); Boulder, 1901, Osterhout 2471; Larimer 
County, 1895, Cowen. 
~ Epilobium ovatifolium sp. nov. 
Plant 2-6 dm. high, propagating by turions; stem glabrous 
xcept the decurrent lines which are more or less crisp-hairy, 
“Specially 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, 1.5~2 mm. in diameter, sessile, 
More or less crisp and glandular hairy ; seed a little over 1 mm. 
long, abr uptly contracted above, but without neck ; coma white, 
ut 6 mm. long. 
The type specimens are labeled E. Hornemannit 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 
* Grevistylum and E. glandulosum. It differs from the former 
