Part 4, 1908] ROSACEAE 353 
Hypanthium acute at the base ; bractlets linear-lanceolate ; rachis 
of the leaves appressed-pubescent. (Western species.) 6. A. subarctica. 
Hypanthium obtuse at the base; bractlets broadly lanceolate ; 
rachis of the leaves glabrate or nearly so, (Eastern species.) 7. A. Htoralis. 
Leaflets broadly obovate, 0.5-1 cm. long, few-toothed, usually tomen- 
tulose beneath but silky only on the veins; ‘bractlets linear or lanceo- 
late, much shorter than the sepals. 8. A, Egedit, 
1. Argentina argentea Rydb. Bull. Torrey Club 33: 143. 1906. 
Argentina anserina concolor Rydb. Mem. Dep. Bot. Columbia Univ. 2: 160, mainly. 1898. Not 
Potentilla anserina concolor Seringe. 1825. 
Basal leaves 1-2 dm. long, pinnate, with 11-25 larger leaflets and smaller ones inter- 
posed; rachis with long white, at first ascending, soon spreading hairs; larger leaflets 
1-3 cm. long, obovate, rounded at the apex, serrate with 7-20, ovate or ovate-lanceolate 
teeth, white-silky on both sides or a little greener above, the smaller ones less than 1 cm. 
long and few-toothed; stolons 1-5 dm. long, white-silky with ascending or spreading hairs; 
‘pedicels 2-7 cm. long, white-silky; hypanthium and calyx white-silky, the former 5-8 mm. 
wide; bractlets oblong or elliptic, 4-6 mm. long, usually entire, about equaling the ovate 
‘or ovate-lanceolate sepals; petals obovate or broadly oval, 6-9 mm. long; achenes 2 mm, 
long, brown, obliquely obovate, corky, with a deep groove. 
TYPE LOCALITY: Not given in the original, but the type in Columbia University herbarium 
was collected on Wood Mountain, Assiniboia [Saskatchewan], Macoun 1047. 
DISTRIBUTION : Wet places in the interior, from Fort Simpson on the Mackenzie River to 
South Dakota, New Mexico, Arizona, Oregon, and British Columbia. 
2. Argentina Anserina (1,.) Rydb. Mem. Dep. Bot. Columbia 
Univ. 2: 159. 1898. 
Potentitla Anserina ¥,. Sp. Pl. 495. 1753. 
Potentilla Argentina Huds. Fl. Angl. 195. 1762. 
Argentina vulgaris Lam. Fl. Fr. 3: 119. 1778. 
Dactylophyllum Anserina Spenn, Fl. Frib. 1084. 1829. 
Fragaria Anserina Crantz, Stirp. Austr.2: 9. 1763. 
Main stem almost none, from acluster of fascicled roots and producing numerous runners 
3-6 dm. long; leaves 1-2 dm. long, interruptedly pinnate, with 9-31 larger leaflets and smaller 
interposed, in the typical form spreading or flat on the ground, slightly silky and green 
above, white-silky and tomentose beneath; larger leaflets 1-4 cm. long, oblong or oblanceo- 
late, usually acute, deeply and sharply serrate with linear-lanceolate teeth in the European 
and eastern American form, more obovate, rounded at the apex and with broader ovate 
or triangular teeth in the Rocky Mountain form; flowers 1-2 cm. in diameter, on pedicels 
3-10 cm. long; bractlets simple and lanceolate, or often broader, ovate-lanceolate, toothed 
or divided, generally a little longer than the broadly ovate sepals; petals oval, 7-10 mm. 
long; achenes numerous, corky, very thick, grooved at the upper end. 
TYPE LOCALITY: Europe. . . ; 
DISTRIBUTION: Native of Europe and Asia; probably only naturalized in eastern America, 
from Canada to Wisconsin, Iowa, and New York, but native from Manitoba to New Mexico, 
southern California, and Alaska. 
ILLUSTRATIONS: Morison, Hist. 1?: £/. 20, f. 4; Sturm, Deuts. Fl. 4: £2. 7; Engl. Bot. pi. 
861; Fl. Dan. pl. 544 ; Dietr, Fl. Bor. 2: p/. 142 ; Hayne, Arzn. Gew, 4: p/. 31; Thome, Fi. Deuts. 
3: pl. 404; Sv. Bot. pl. 152; Curt. Fl. Lond. 3: p/. 37 (203) ; Schrank, Fl. Monac. p/. 386 ; Britt. & 
Brown, Ill) Fl. 7. 1934; Mem. Dep. Bot. Columbia Univ. 2: p/. 98. 
3. Argentina pacifica (Howell) Rydberg. 
Potentilla Anserina grandis T. & G. Fl. N. Am. 1: 444, . 1840. 
Potentilla pacifica Howell, Fl. NW. Am.1: 179. 1898. . ; 
Argentina Anserina grandis Rydb. Mem. Dep. Bot, Columbia Univ. 2: 161. 1898. 
Basal leaves 3-4 dm. long, mostly erect; rachis mostly with appressed pubescence or 
almost glabrous; larger leaflets 15-25, obovate or oval, the upper 4-6 cm. long, coarsely 
serrate, obtuse, glabrous or nearly so above, white-silky and tomentose beneath; stolons 
1-8 dm. long, usually glabrous; peduncles 1-2 dm. long, slightly silky; hypanthium silky, 
nearly 1 em. wide; bractlets lanceolate, 6-8 mm. long; sepals ovate, 5-6 mm. long; petals 
rounded-obovate or nearly orbicular, 10-12 mm. long; carpels about 2 mm. long, dark- 
brown, rounded on the back, neither grooved nor corky. 
TYPE LOCALITY: Oregon. . . 
DISTRIBUTION : Alaska to California, near the coast. 
