69 



^ 



trifoliolate, with the leaflets ovate and obtuse. There is a rather 

 short rhi2ome (Plate X, Fig. 49) with a strongly developed 

 and persistent primary root (R) upon which no tubercles 



were observed. 



Cassia Chauiaccrista 



and C. nictitans L. show the same manner of germinating as 

 represented on Plate X, Fig. 50, where a seedling of C. Cha- 

 macfris^a has been figured. The only difference between these 

 species during the germination period is that C, Chaniaecrista 

 is larger in all details. The cotyledons are above ground, 

 sessile and roundish, borne on a hypbcotyl which is not very 

 long. The primary root is long and slender, and shows at 



+ 



this very early stage the small tubercles, which are so 



characteristic of most of the Leguminosa^, Lateral roots 



have been formed, but these are as yet rather short. The 



plumule has developed an erect stem, of which all the leaves, 



even the first one, show the same shape as the later ones, 



being pari-pinnate and minutely hairy along the margin of 



the leaflets. 



ROSACEA. 



Rub lis hispidiis. 



Fig. 51 on Plate X shows a germinating plantlet of this 

 species, and we see there the two short-petioled, ovate and 

 obtuse cotyledons, borne on a distinct hypocotyl. The pri- 

 mary root (R) is slender and shows several lateral branches, 

 while no secondary roots are as yet to be observed. The plum- 



\ 



ule has developed a glandular-hairy stem and carries a few 

 nearly reniforrn leaves, which show the same glandular hairi- 

 ness as does the stem. The leaves are serrate in this very 

 early state, and no other form of leaf will develop even in 

 the next year. Fig. 52 represents a plant two years old, and 

 shows approximately the same shape of the leaves, with the 



r 



exception that the blade is proportionally narrower and 

 acuminate, a form which is very different from that of the 

 leaflets of the final leaves. We further sec in this figure the 



persistence oS. the primary root, and a very short rhizome, 

 from which three secondary roots have been developed. 

 St.^ is the main stem, which is much longer than the second- 



I 



