136 ON SEEDLINGS 



ultimately multisect ; petioles channelled above, dilated at the base, 

 and after the leaves have attained some size auricled with irregularly 

 cut laciniae. 



Nos. 1 and 2. Small, spathulate-cuneate, tridentate at the apex. 



No. 3. Cuneate, obtusely five-toothed. 



No. 4. Shortly and broadly oblong, five-lobed ; lobes obtuse, 

 mostly bidentate. 



No. 5. Oblong-ovate, obtuse, pinnatifid ; lobes subcuneate, 

 dentate. 



No. 6. Triangular-ovate, obtuse, pinnatisect ; lower lobes pin- 

 natifid on the posterior side, coarsely dentate ; upper lobes coarsely 

 dentate. 



No. 7. Triangular-ovate, pinnatisect ; lobes pinnatifid and 

 dentate. 



Radical leaves numerous, ultimately triangular, bipinnatisect, 

 ultimate segments pinnati-fid to -partite ; primary segments oblong 

 the lower two longest ; secondary segments oblong, most developed 

 on the posterior side of the primary segments ; ultimate divisions 

 oblong, cuspidate, entire, or the larger ones dentate. 



Artemisia Mutellina, Vill. 



Hypocotyl erect, terete, 3-5 mm. above ground. 



Cotyledons linear-spathulate, obtuse, entire, glabrous, sessile, 

 recurved, 4-5 mm. long, 1-5-1-75 mm. wide. 



Stem herbaceous, erect, terete, nearly or quite glabrous in the 

 young state, and then having the primary internodes undeveloped, 

 or the first 2-3 mm. long, and the succeeding ones shorter. 



Leaves hoary, with a silky adpressed pubescence, tapering 

 gradually into the petioles ; petiole flattened above or biconvex. 



Nos. 1-4 or 5. Linear, entire, acute, the third to fifth slightly 

 broader above the middle. In strong seedlings the fourth and fifth 

 may be unequally bifid or subequally trifid. 



Nos. 6-10. Trifid with linear, obtuse, or subacute segments, the 

 terminal one being longest. 



Tussilago Farfara, L. (fig. 474). 



Primary root tapering, flexuose, soon supplanted by strong 

 lateral roots from the base of the hypocotyl. 



Hypocotyl very short, subterranean, reddish. 



Cotyledons linear-oblong, obtuse, fleshy, shortly petiolat e, dilated 

 at the base, amplexicaul and subconnate, 5 mm. long including the 

 petiole. 



Stem creeping, subterranean. 



