RANUNCULACE^E 



93 



petiole dilated and sheathing at the base, stipuliform as in the 

 Umbelliferse. 



No. 1. Lamina ternate ; leaflets trifid or the lateral ones bifid, 

 petiolulate ; lobes obtuse, rounded ; petiolules 1 mm. long, the 

 middle one longer ; petiole terete, 8-15 mm. long, purplish. 



The seedlings of Aquilegia flavescens closely 

 resemble those of A. chrysantha, and the same 

 may be said of A. caerulea. 



The cotyledons of Aquilegia atropurpurea, 

 A. Wittmanniana, A. dichroa, and probably 

 others, have a slight emargination when fully 

 developed. 



FIG. 133. Aquilegia 

 chrysantha, var. 

 truncata. Nat. 

 size. 



Isopyrum grandinorum, Fisch. 



Primary root slender, tapering, with lateral 

 rootlets. 



Hypocotyl short, glabrous, tapering indis- 

 tinguishably into the root, and mostly subter- 

 ranean. 



Cotyledons small, glaucous, glabrous, peti- 

 olate, orbicular or rotund-ovate ; lamina 8 mm. 

 long, 2'5 mm. broad; petiole slender, 5 mm.long. 



Stem herbaceous or shrubby, with very 

 short scarcely developed internodes, densely 

 covered with the withered petioles of old leaves. 



Leaves biternate on the adult plant (primary ones simply ter- 

 nate), radical and ultimately cauline, alternate, exstipulate, gla- 

 brous, glaucous, purplish beneath, petiolate ; petioles slender, terete, 

 or slightly flattened above, dilated and sheathing at the base, 

 glaucous, glabrous. 



Nos. 1-3. Ternate ; leaflets suborbicular, entire. 



No. 4. Ternate ; terminal leaflet unequally bifid ; lateral leaflets 

 bifid or bipartite. 



No. 5. Ternate ; terminal leaflet trifid ; lateral leaflets unequally 

 bifid, with the smaller lobe on the posterior side. 



No. 6. Ternate ; terminal leaflet tripartite with sub-obovate seg- 

 ments ; lateral leaflets bipartite with the posterior segment oval, 

 the much larger anterior one rotund-obovate. 



No. 7. Ternate ; terminal leaflet tripartite, with the middle seg- 

 ment obovate, the lateral ones narrower ; lateral leaflets bipar- 

 tite with the posterior segments small and oval, the anterior one 

 elliptic, obtuse. 



No. 8. Almost biternate, with obovate leaflets. 



