566 Rydberg : Rocky Mountain flora 



Touterea sinuata sp. nov. 



A decumbent biennial, 3-4 dm. high ; stems stout, white, 

 pubescent, much branched; lower leaves 10-15 cm. long, lanceo- 

 late or oblanceolate, tapering at the base, sinuately lobed or 

 dentate ; lobes or teeth broadly triangular, but often obtusish ; 

 upper leaves broadly lanceolate, or even ovate, sessile and cuneate 

 or rounded at the base ; flowers numerous, usually with 1-2 linear 

 bracts ; sepals lanceolate, tapering into a subulate tip, soon re- 

 flexed, about 8 mm. long ; petals golden yellow, 1 5-20 mm. long; 

 oblanceolate, acute ; staminodia similar ; filament slightly dilated ; 

 capsule 2.5-3 cm - l° n g» 7 - 8 mm - thick; seeds winged, about 

 3 mm. 



This species is also a close relative of T. speciosa, differing in 

 the decumbent, branched habit and the broad leaves. The type 

 grew in a canon at an altitude of about 1,800 m. 

 Colorado: Boulder, 1895, Rydberg. 



Acrolasia gracilis sp. nov. 



Annual, 3—5 dm. high, at first simple, but later branching ; 

 leaves 5-10 cm. long, deeply pinnatifid to near the midrib; rachis 

 and lobes 2-3 mm. wide ; the latter oblong or lanceolate, obtuse ; 

 floral leaves lanceolate, sessile, pinnatifid or toothed, rarely entire; 

 sepals lanceolate, 4—5 mm. long ; petals obovate, 6-7 mm. long, 

 strongly striate ; capsule sessile, linear-cylindric, 2.5-3 cm - l° n g 

 and about 2 mm. thick ; seeds more or less prismatic, muricate. 



This is Nuttall's Trachyphytum gracile, a specimen of which is 

 in the Columbia University herbarium. The species was never 

 published, however. The name appears only as a synonym under 

 Mentzclia albicaulis in Torrey and Gray's Flora, 1 : 534. I 

 think, however, that it is well distinct from A. albicaulis or Bartonia 

 albicaulis Hook. The latter is characterized by the smaller petals, 

 only 3-4 mm. long ; the middle and upper leaves are often entire 

 or with an entire lower and upper portion and only with a few 

 lobes in the middle. In Hooker's type specimen the leaf-lobes are 

 very few and Urban and Gilg confused it with A. iutegnfotia, 

 claiming that Mentzelia dispersa Wats, (which is the same as A. 

 integrifolia} is the typical form of Mentzelia albicaulis. A. in- 

 tegrifolia (Wats.) Rydb. and A. compacta (A. Nels.) Rydb. are, 

 however, easily distinguished from the other species by the short 

 linear-oblong, obtuse sepals, only }< as long as the petals, and by 



