572 ON SEEDLINGS 



Six days after germination they are orbicular, slightly narrowed 

 at the base, with a small tooth on each side above the subtruncate 

 innovation, shortly petiolate, emarginate with a small tooth in the 

 notch. 



In ten days from germination they become ovate-oblong, or 

 simply oblong ; the lower half below the constriction has two or 

 three small teeth on each side and is suddenly narrowed, almost 

 truncate at the base with a pale-coloured midrib ; the upper half 

 representing the true cotyledon remains slightly elongate-orbicular 

 with a minute tooth in the notch, and no discernible midrib in the 

 fresh state. Petiole 1*5-2 mm. 



Finally they become ovate, cuneate at the base, the innovation 

 forming now slightly the larger part, with generally three acute or 

 slightly incurved teeth on each side, and a ciliate margin and petiole ; 

 the upper half or true cotyledon is elongate-orbicular or rhomboid- 

 orbicular, emarginate, with a tooth in the notch. 



Seedling. 



Primary root normal. 



Hypocotyl erect, tapering downwards, glabrous, reddish, 9-12 

 mm. long. 



Cotyledons ovate, obtuse, minutely emarginate and mucronate 

 in the notch, constricted above the middle, causing the lamina to 

 be somewhat trilobed, petiolate, alternately and ascendingly pen- 

 ninerved, with the lateral nerves of the upper lobe incurved and 

 uniting at the mucro, and a strong branch entering each of the 

 gland-tipped lateral lobes, minutely ciliate at the margin, other- 

 wise glabrous except on the petiole ; lamina 7-10 mm. long, 

 5-6'25 mm. wide ; petiole semiterete, channelled above, minutely 

 hairy at the margin and beneath the midrib. Apex and small 

 teeth of lateral lobes each tipped with a glandular, colourless 

 mucro, having a few large, more or less discoloured openings into 

 the interior. 



Stem annual, erect, terete, minutely pubescent, reddish ; 1st 

 internode 4-8 mm. long ; 2nd similar. 



Leaves simple, cauline, opposite in the lower part, alternate up- 

 wards, exstipulate, petiolate, alternately and ascendingly incurvi- 

 nerved, finely pubescent on both surfaces, bright green above, paler 

 beneath ; petioles semiterete, channelled above, finely pubescent. 



First and second pairs ovate, obtuse, obtusely or obsoletely 

 dentate. 



Ultimate leaves ovate or oval, obtuse, more or less tapering or 

 cuneate at the base, obtusely dentate. 



