492 



ON SEEDLINGS 



which are entire or incise-serrate according to their size ; terminal 

 three leaflets imperfectly divided at the base and decurrent on the 

 primary midrib, acutely incise-serrate ; middle ones and all the 

 larger oblong, rounded at the apex, deeply and acutely incise-ser- 

 rate. 



Potentilla bifurca, L. (fig. 317). 



Primary root fleshy and stout, suddenly tapering to a long 

 slender point, and throwing off numerous branching adventitious 

 rootlets. 



Hypocotyl scarcely developed. 



Cotyledons small, ovate-oblong, very obtuse, glabrous, 4'5 mm. 

 long, 3*5 mm. broad ; petiole dilated, 

 sheathing at the base, 4'5 mm. long. 

 Stem herbaceous. 



Leaves simple, more or less pin- 

 nati-fid or -sect, radical when the plant 

 is young, sparsely hairy on both sur- 

 faces, bright green above, paler be- 

 neath ; petioles subterete, flattened 

 above or subchannelled, hairy, pale 

 green ; stipules adnate to the petiole 

 nearly to the top, strongly ciliate at 

 the margin, colourless, with an ovate- 

 acute greenish tip. 



No. 1. Rotund, shallowly trifid. 

 No. 2. Similar, larger, more deeply 

 trifid. 



No. 8. Ternately pinnatisect ; 

 lateral lobes oval, obtuse ; terminal 

 lobe cuneate, trifid. 



No. 4. Similar to No. 3, but larger, 



and the lateral lobes oblique, deeply bifid on the posterior side, with 

 a tooth on the anterior side. 



No. 5. Pinnately five-foliolate ; basal pair of lobes small, ovate, 

 entire ; middle pair of lobes obliquely trifid ; terminal lobe large, 

 cuneate-oblong, pinnatifid. 



No. 6. Bipinnatisect with narrowly oblong, obtuse, entire segments. 



Alchemilla aphanoides, Mutis. 



Primary root very long and branching freely. 



Hypocotyl terete, glabrous, 4-6 mm. long. 



Cotyledons oval, obtuse, entire, glabrous, petiolate ; lamina 2-5- 



FIG. 817. Potentilla bifurca. 

 Half nat. size. 



