MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 153 



A small plant having 3-foliolale leaves with long-petiolate rounded 

 3-lobed leaflets, small greenish or greenish white flowers, and stipi- 

 tate carpels. It is a rare plant within the region. 



Montana: (Western), 1882, Tzvcedy. 

 Actaea rubra (Ait.) Willd. Enum. 561 [111. Fl. 2: 55] ; Actaca sp'- 



cata rubra Ait. Hort. Kew. 2: 221 [Syn. Fl. l' : 55 ; Man. R. 



M. 12]. 



The eastern plant has cherr3^-red ellipsoid berries, which are about 

 10-12 mm. long and 6 mm. in diameter, containing 8-12 seeds. 

 The leaflets are narrower than in the western plants and less in- 

 cised. The only specimen I have seen from Montana which could 

 be referred to A. rubra is the following : 



Montana: Belt Mts., 1885, F. W. Anderson, 18. 

 Actaea arguta Nutt. ; Torr. & Gray, Fl. i : 35 ; Actaca sficata 



argiita Torr. Pac. R. R. Rep. 4 : 63 [Syn. Fl. i' : 55 ; Man. R. 



M. II ; 111. Fl. 2 : 55 ; Bot. Cal. i : 12].' 



Under this two different forms have been included : one with 

 nearly spherical small red berries, 5-7 mm. long, and seeds about 

 3 mm. long ; the other with white, ellipsoid berries, nearly twice as 

 large as those of the other form. Nuttall describes the berries of A. 

 arguta as being small, spherical and red. The two grow^ in the 

 same region and often together, and are very hard to distinguish 

 when in flow^er, but are readily separated when in fruit. A. arguta 

 grows in open woods at an altitude of 1000-2500 m. 



Montana: Bridger Mts., i8g6, F/odj//an, 4^g; Meadow Creek, 

 1886, Tzvcedv, 106^; Missoula Co., Mrs. Kennedy ; Bozeman, 1892 : 

 W. T. Skazu; Helena, 1886, F. D. Kelsey ; Anaconda, 1891, Prof. 

 Merritt; Emigrant Gulch, 1897, Rydberg & Bessey, 4.063a. 



*Actaea eburnea. 



Perennial, with a rather thick knotted rootstock ; stem stout, 6-10 

 dm. high, with large membranaceous, rounded-obtuse sheaths at 

 the base, glabrate or the upper portion villous-puberulent ; leaves 

 ternate or the lower twuce ternate, the divisions pinnate ; leaflets 

 broadly ovate, often 3-5-lobed, incised and sharply serrate, acuminate ; 

 raceme ovoid, in fruit elongated; bracts linear-lanceolate, 5-8 mm. 

 long; pedicels 0.5-1 cm. long, in fruit 1-2 cm., mostly ascend- 

 ing ; sepals orbicular, early deciduous ; petals narrowly rhombic- 

 spatulate, acute, 3-4 mm. long ; filaments 4-5 mm. long ; fruit white, 

 ellipsoid, 9-12 mm. long and about 6 mm. in diameter, about 12- 

 seeded ; seeds obliquely pear-shaped, triangular, with a rounded back, 

 about 4 mm. long. 



