528 



ON SEEDLINGS 



or whatever else might have accumulated above the seeds in 

 a state of nature. The second four leaves of Lecythis are 

 roundly cordate followed by four that are ovate, and then by 

 others which are lanceolate. The ultimate form is oblong- 

 lanceolate, serrate, and the leaves are alternate, distichous, 

 and arranged on the half plan. 



Callistemon rigidus, E. Br. (fig. 837). 

 Primary root fibrous, tapering downwards, normal. 

 Hypocotyl erect, terete, glabrous, reddish, 4-7'5 mm. long. 

 Cotyledons elliptic or rather rhomboid, obtuse, petiolate, glabrous, 

 with what appear to be alternate, ascending, very obscure nerves in 

 the fresh state, entire, rather tbick, light green above, paler beneath, 

 tapering into the petiole ; lamina 1'5- 

 3'5 mm. long, 1-25-2-5 mm. wide ; 

 petiole flattened above, convex beneath, 

 1-25-2-5 mm. long. 



Stem erect, terete, somewhat flexu- 

 ose, reddish at a very early stage, hairy 

 or subvillous ; 1st internode 1*25-2-5 

 mm. long ; 2nd not developed or rarely 

 slightly; 3rd 9-15 mm. long; 4th 

 4-5-6-5 mm. 



Leaves simple, entire, cauline, 

 alternate (first two opposite or almost 

 so), exstipulate, very shortly petiolate 

 in the seedling, but as tbe plant reaches 

 the adult state tbe petiole becomes 

 shorter and shorter until tbe leaves 

 become sessile, merely tapering to tbe 

 base, trinerved from base to apex, and 

 in the seedling stage showing alter- 

 nate, ascending nerves that connect tbe median with tbe marginal 

 or submarginal ones, pubescent, or silky with adpressed or slightly 

 spreading whitish hairs, dotted with pellucid glands ; petioles in tbe 

 seedling plant short, flattened beneatb, convex above. 



Nos. 1 and 2. Opposite or nearly so, rhomboid-elliptic, obtuse, 

 obscurely trinerved in tbe lower half. 



Nos. 3 to 12. Elliptic, acute or subacute, more or less dis- 

 tinctly trinerved, ligbt green above, paler beneatb and shining. 



Ultimate leaves linear, acute, or ending in a spine, trinerved, 

 with tbe marginal ones sunk in tbe thickened marginal tissue, 



FIG. 337. Callistemon rigidus. 

 Nat. size. 



