HYDROPHYLLACILE 



251 



Seedling (fig. 531). 



Primary root long, tapering downwards, with a few lateral 

 rootlets, annual. 



Hypocotyl erect, terete, minutely and thinly pubescent, pale 

 green or almost colourless, 1-8-2-5 cm. long. 



Cotyledons linear, obtuse, petiolate, minutely pubescent, with a 

 distinct midrib but no other venation visible in the fresh state ; 

 lamina 1-3-1-5 cm. long, 8-3-5 mm. wide, narrowed into the petiole; 

 petiole semiterete, channelled above, pubescent on the edges above, 

 or nearly glabrous, 7-9 mm. 

 long. 



Stem erect, terete, thinly 

 glandular - pubescent with de- 

 curved hairs, pale green ; 1st 

 internode about 1-3 cm. long ; 

 2nd about 2-3 cm. 



Leaves simple, pinnatisect, 

 cauline, opposite (at least in the 

 lower part of the plant), exstipu- 

 late, petiolate, pubescent on both 

 surfaces with bulbous - rooted 

 short hairs directed towards the 

 apex of the leaf and densely 

 dotted with sessile glands ; 

 primary nerves opposite or alter- 

 nate, ascending; secondary nerves 

 alternate, ascending ; petioles 

 semiterete, shallowly channelled 

 above, pubescent or more or less 

 glandular - pubescent, tapering 

 upwards from a broadish, semi- 

 amplexicaul base. 



Nos. 1 and 2. Opposite, oblong in outline, pinnatisect, pinnatifid ; 

 primary segments ovate-oblong, obtuse, shortly stalked ; secondary 

 segments short, rotund-oblong, obtuse, entire. 



Nos. 3 and 4. Opposite, lanceolate or linear in outline, pinnati- 

 sect, pinnatifid ; primary segments oblong, obtuse, narrowed to- 

 wards the base and shortly stalked ; secondary segments oblong, 

 obtuse, slightly toothed. 



Phacelia bipinnatifida, Michx. ? 



Primary root as in P. tanacetifolia. 



Hypocotyl short, obconical, suddenly tapering into the root. 



PIG. 531. Phacelia tanacetifolia. 

 Half nat. size. 



