390 



ON SEEDLINGS 



Fourth pair triangular and similar to the last, but the segments 

 are more slender and more numerous. 



Ajuga Chamaepitys, Schreb. (fig. 596). 



Primary root tapering, flexuose, giving off lateral, fleshy, much 

 branched secondary roots. 



Hypocotyl ascending, terete, fleshy, glabrous, reddish, 8 mm. long. 

 Cotyledons oblong, obtuse, glabrous, petiolate ; lamina 4 mm. 



long, 1'5 mm. wide ; 

 petiole 2 mm. long. 

 Stem herbaceous 

 decumbent, branch- 

 ing. 



Leaves simple, 

 radical and cauline, 

 opposite, exstipulate, 

 petiolate, gradually 

 decurrent on the peti- 

 ole almost or quite 

 to the base except in 

 the primary leaves, 

 deep green above, 

 glaucous beneath 

 and strongly ribbed, 

 revolute at the 

 margins. 



First pair small, 

 oblong, obtuse or sub- 

 acute, entire, distinct- 

 ly petiolate ; lamina 

 4-5 mm. long, 2-25 

 mm. wide. 



Second pair lanceolate, obtuse, tapering somewhat to both ends 

 with generally a small tooth on each side. 



Third pair similar to the second but larger, with a deeper blunt 

 tooth on each side, trinerved. 



Fourth pair narrowly cuneate, deeply trifid, with oblong, obtuse 

 lobes, trinerved. 



Fifth pair rather unequal, one leaf pinnatifid with four oblong, 

 obtuse lobes and a larger terminal one ; the other leaf deeply 

 trifid. 



Sixth pair narrowly oblong, pinnatifid, with linear-oblong, ob- 

 tuse segments, the terminal one larger and one- to two-toothed. 



FIG. 596.- 



-Ajuga Clu 

 Nat. size. 



Chamcepitys. 



