NEW PLANTS FROM NORTH DAKOTA I45 



autem inferiorum et omnia ramorum sterilium petiolos conspicuos 

 usque 4 mm. longos vel breviores gerentia, serraturae aequales 

 vel inaequales, utrinque 3-18, neque profundae neque acres, 

 facies superior obscure viridis, nitida, matura siccata lucide viridis, 

 inferior folioli recentis lucide viridis, maturantis pallide glauca, 

 maturi insigniter dealbata. Panicula' et florens et frugifera pyra- 

 raidalis, densa, in saltibus minor (3-9 cm. alta), in campis apertis 

 maior (7-15 cm. alta). Fructus complanati, ambitu paene orbicu- 

 lares, apice brevi, immaturi succulenti, maturi sicci, 4 mm. alti. 



Stem subterranean, sending forth stem-like branches upwards, 

 these being one foot high in the first year, 3 feet in the second year, 

 5 feet in the third year, and 7 feet in the fourth year, which is the 

 maximum height seen by the writer. The wooden part nude 

 throughout, with scattered, light, juicy buds on the sites of former 

 leaves, brown, lenticellate. The young herbaceous tops and the 

 petioles with a purple-spotted glaucescent bloom early in the 

 season, later dark chestnut-colored, glutinous. Leaves 15-30 cm. 

 long, very crowded. Leaflets 13-17, sometimes 19, very variable 

 in size and outline, 3-9 cm. long, oblong-lanceolate, with acuminate 

 or acutish apex and rounded base, the leaflets of the upper leaves 

 on the fruiting twigs almost sessile, but those on the lower leaves 

 and all on the sterile twigs very plainly petiolulate with even 

 to 4 mm. long petioluks, serratures even or uneven, 3-18 on a 

 side, not very deep or sharp, upper face dark green, shining, at 

 maturity becoming lightish green in drying, lower face in youngest 

 leaflets light-green, in somewhat older ones pale-glaucous, at 

 maturity remarkably whitened. Panicle pyramidal in flower; 

 also in fruit, being smaller in the woodland (3-9 cm. high), larger 

 on the open prairie (7-15 cm. high), compact. Drupelets flattened, 

 circumference almost orbicular, with a short tip, unripe juicy, 

 ripe dry, 4 mm. high. 



In order to differentiate this species from related ones, suffice 

 it to state, that R. cismontana Greene has leaflets 11-13, light- 

 green above, 4-6 cm. long, subsessile, serratures 10-12 on each 

 side, and panicle narrowly pyramidal; and that R. samhucina 

 Greene has leaflets 11-13, light-green above, 7-10 cm. long, sub- 

 petiolulate, serratures 11- 12 on each side, and panicle oval, lax. • 



From the state of Minnesota with its abundance of R. glabra 

 segregates this group of shrubs is said to have established itself 

 on the western border of the Red River of the North, but the 



