280 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Yellowstone Park have been confidently referred to this variety by 

 Hollick and Britton, 1. c, and Parry's no. 41 from Northwestern 

 Wyoming is doubtless the same. 



C. alpinum, L. Densely silky : stems weak, matted : leaves 

 elliptic-ovate, in the typical form only 4—5 lines long : petals notched 

 at the apex, 1^-2 times the length of the sepals. — Spec. 438 ; Torr. 

 & Gray, Fl. i. 188 ; Regel, Ost-Sib. i. 433, 434. G. lanatum, Lam. 

 Encycl. i. 680. C. latifolium, Greville, Mem. Soc. Wern. iii. 429. 

 G. vulgatum, Hook. f. Arc. PI. 288 in part. ? C. latifolium, Hart., 

 Trimen's Journ. of Bot. ix. 205. — Arctic America from Greenland 

 to Alaska, also in Labrador, the Hudson Bay region, and upon the 

 Rocky Mountains of British America. (Europe and Asia.) The 

 following varieties extend farther southward. 



Var. Beeringianum, Regel. Hirsute and less silky-villous, 

 somewhat viscid above : leaves smaller, oblong. — Ost-Sib. i. 435. 

 G. Beeringianum, Cham. & Schlecht., Linna^a, i. 62. G. vulgatum, var. 

 Beeringianum, Fenzl in Ledeb. Fl. Ross. i. 409. — Alaska to the 

 Rocky Mountains of Colorado and Arizona. 



Var. Fischerianum, Tour. & Gray. Hirsute, taller, 8-10 

 inches or even more than a foot in height : leaves rather thick, elliptic- 

 lanceolate or oval-lanceolate, acute or acutish, an inch or more in 

 length: capsule H-2 (or rarely 3) times the length of the calyx. — 

 Fl. i. 188; Regel, 1. c. i. 438. G rigidum, Ledeb. Mem. Petr. 

 v. 538. G. Fischerianum, Seriuge in DC. Prodr. i. 419. G. vulga- 

 tum, vars. grandiflorum and macrocarpum, Fenzl in Ledeb. Fl. Ross, 

 i. 409, 410. To judge from the figure in the Caiques des Dessins 

 G. stellar ioides, M09. should be referred here also, having been placed 

 by Seringe probably through error in § Strephodon. — A stout variety 

 passing to G. arvense, var. maximum, but with broader more elliptic- 

 ovate leaves and longer capsules. Alaska to Humboldt Co., Calif., 

 Rattan. (Siberia, Japan.) The leaves are thicker and the sepals 

 more pubescent and acute than in G. pilosum, Ledeb., to which it is 

 also nearly related. 



Var. glabratum, Hook. Leaves and calyx nearly smooth. — 

 Parry's 2d Voy. 390; Fl. Bor.-Am. i. 104. — Arctic America with 

 the pubescent forms. (N. Eur.) 



§3. Dichodon, Bartl. Styles normally 3: teeth of the capsule 

 erect or slightly spreading, not circinate-revolute. — Endl. Gen. 970. — 

 Our species with symmetrical capsule and short glabrous leaves. 



C. trigynum, Vill. Perennial, with stems weak, spreading, some- 

 what matted, smooth or glandular-pubescent, loosely 2-3 flowered: 



