212 



ON SEEDLINGS 



type, and the penninerved venation is similar to that of the 

 leaves in the last case. The first pair of leaves are oblong - 

 oval and obtuse ; but the ultimate leaves are ovate or elliptic, 

 more pointed and coriaceous. The seedling of L. robustum 

 is similar in all important points to that of L. japonicum, but 

 the cotyledons are perhaps more distinctly emarginate. The 

 first two pairs of leaves are lanceolate-elliptic. 



Forsythia suspensa, Vahl (fig. 510). 



Primary root a perennial, woody, long taproot, with long, distant 

 horizontal fibres, almost smooth. 



Hypocotyl firm, l'5-2 cm. long, 1 mm. thick, terete, glabrous, 

 brown. 



Cotyledons with swollen buds in their axils equal, 1-5-2 cm. 

 long, 6-9 mm. wide, emarginate, oblong-ovate, cuneate at the 

 base, concave, obscurely pinnatinerved, 

 firm but not very thick, glabrous, dull 

 yellowish-green. 



Stem erect, terete, glabrous, ulti- 

 mately woody, rough with lenticels. 



Leaves simple or compound, serrate, 

 cauline, opposite, exstipulate, petiolate, 

 with alternate or sometimes subopposite, 

 ascending nerves, glabrous, deep green 

 above, paler or subglaucous beneath ; 

 petioles channelled above, semiterete, 

 dilated at the base, and articulated with 

 the stem. 



The first and second pairs are broadly 

 ovate, obtuse, serrate, and penninerved. 



Ultimate leaves very variable on the 

 same branch, and simple or compound 

 often mixed even on vigorous branches ; 

 simple ones ovate or subcordate, acute, 

 or in some instances rotund-ovate, 

 obtuse ; compound ones pinnately tri- 

 foliolate ; terminal leaflet ovate, acute, cuneate at the base ; lateral 

 leaflets much smaller, elliptic, acute, unequal at the base, or obovate 

 and obtuse or acute, variable. 



Syringa vulgaris, L. 



Ovary two-celled, with one ovule in each cell ; ovules anatropous ; 

 micropyle superior. 



FIG. 510. 



Forsythia suspensa. 

 Nat. size. 



