572 Rydberg : Rocky Mountain flora 



Gaura coloradensis sp. no v. 



Herbaceous, biennial or perennial with fusiform root ; stem 

 5-7 dm. high, strict, but somewhat branched, finely strigose, more 

 or less red ; leaf-blades narrowly oblanceolate, 5-10 cm. long, 

 gradually tapering below into a short petiole, or the upper sessile, 

 callous-denticulate, finely strigose ; inflorescence slender and 

 rather lax, 1.5-2 dm. long ; hypanthium about 2 cm. long, finely 

 strigose ; sepals about I cm., linear-lanceolate, reflexed ; petals 

 about 8 mm. long, spatulate, pink, short-clawed ; filaments about 

 equaling the petals ; anthers brown, about 4 mm. long ; fruit 

 S-IO mm. long, fusiform, 4-angled, tapering below into a short 

 and rather slender stipe-like base. 



In habitat and pubescence this species resembles most G. Pitcli- 

 eri, but the leaves are oblanceolate instead of lanceolate and the 

 fruit is that of G. sinuata. G. coloradensis grows in meadows at 

 an altitude of about 1,500 m. 



Colorado : Fort Collins, 1895, Cowen (type); east of College, 

 1897, Crandall 1308 ; east of Poudre, 1895, Cowen 1632. 



Suida interior sp. nov. 



Comus Baileyi Coult. & Evans, Bot. Gaz. 15 : $•/, in part. 1890. 



A shrub 2-5 m. high ; bark of the old stems grayish, of the 

 young shoots brownish ; young shoots, petioles and inflorescence 

 densely pubescent with short villous hairs ; leaves elliptic or oval, 

 acute at both ends, 5-9 cm. long, finely short-strigose on both 

 sides and more or less villous on the veins and in their angles be- 

 neath ; hypanthium strigose; sepals minute, about 0.5 mm. long 

 or less ; petals linear-lanceolate, about 4 mm. long ; fruit white, 

 about 5 mm. in diameter ; stone elliptic, slightly oblique, longei 

 than broad, nearly smooth. 



This species was included in the original description of Comus 

 Baileyi, but is quite different from the type thereof from the lake- 

 shores of Michigan. This has conspicuous sepals and has a more 

 flattened stone, channeled on the edge and with square shoulders. 

 In reality, S. interior is much more closely related to S. Stolon- 

 ifera {Comus stolonifera Michx.), especially the western variety 

 described below, but differs in the villous pubescent instead of 

 sparingly strigose twigs and inflorescence. In J>. stolonifera and 

 its variety the stone is usually broader than long and very oblique. 

 S. interior grows on river banks west of Mississippi River. 



