566 Rydkerg : Rockv Mountain flora 



Touterea sinuata sp. no v. 



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, 15-20 mm. long; 

 oblanceolate, acute ; staminodia similar ; filament slightly dilated ; 

 capsule 2.5-3 cm. long, 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 caiion at an altitude of about 1,800 m. 

 Colorado: Boulder, i^gt^, Rydbcrg. 



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. long 

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



This is Nuttall's TracliypJiytuni gracilc, a specimen of which is 

 in the Columbia University herbarium. The species was never 

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

 Mc)it:;clia albicaidis in Torrey and Gray's Flora, i : 534. I 

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

 albicaidis 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 {&\n and Urban and Gilg confused it with A. integrifolia, 

 claiming that Mcntzclia dispcrsa Wats, (which is the same as A. 

 integrifolia) is the typical form of Mentselia albicaidis. 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 V^ as long as the petals, and by 



