COMPOSITE 139 



in the lamina they curve round nearly parallel within the margin, but 

 are more or less irregular or undulated, and unite with the midrib 

 close to the apical sinus. The midrib is also undulated or zigzag, 

 and gives off from its angles alternate, ascending, lateral branches that 

 unite with the lateral nerves and form a series of large reticulations. 



Stomata on the under surface tolerably numerous and large ; few 

 on the upper surface, but similar to those on the under. 



Stem herbaceous and elongated when about to flower. 



Leaves simple, radical and cauline, petiolate or sessile towards 

 the upper part of the stem, glabrous in the seedling, pubescent and 

 cottony above in the adult plant, densely pubescent beneath ; petioles 

 somewhat channelled above, dilated and clasping at the base, gradu- 

 ally becoming shorter on the stem till the leaves are sessile. 



Nos. 1 and 2. Oval, obtuse, entire, with a few alternate, ascending 

 nerves, glabrous, bright green. 



The leaves on the lower part of the stem are oblong, obtuse, 

 pinnatifid, or coarsely dentate. The median ones are sessile, oblong, 

 obtuse, narrowed to the base, pinnatisect : segments oblong, obtuse, 

 more or less coarsely dentate or incise-dentate principally on the 

 posterior side. The upper ones are shorter, sessile, much less nar- 

 rowed at the base, pinnatisect with linear or oblong segments, again 

 subpinnatifid or coarsely cut, especially on the posterior side. 



Senecio pulcher, Hook, et Arn. 



Primary root stout, colourless, tapering downwards, with lateral, 

 adventitious roots which soon become stronger than itself. 



Hypocotyl undeveloped. 



Cotyledons broadly ovate-oblong, obtuse, minutely emarginate, 

 fleshy, petiolate ; venation obscure, comprising a midrib with irre- 

 gular lateral branches which branch again, anastomose and unite 

 with a slender submarginal nerve, glabrous, deep green, suffused 

 with violet beneath ; lamina 1-1-8 cm. long, 7-10 mm. wide ; petiole 

 semiterete, flattened above or shallowly grooved, dilated and connate 

 at the base, ri-1'9 cm. long. 



Stem herbaceous, and developed when about to flower ; primary 

 internodes undeveloped. 



Leaves simple, radical and cauline ; venation irregular ; nerves 

 alternate and incurving, obscurely reticulate, deep opaque green 

 above, paler, but often suffused with violet beneath, glabrous ; petiole 

 semiterete, grooved above, dilated and clasping at the base, gla- 

 brous. 



No. 1. Broadly oval or rotund-oval, obtuse, obsoletely dentate. 



No. 2. Similar, but more decidedly serrate-dentate. 



