160 ON SEEDLINGS 



nerved and reticulate, pale green above, glaucous beneath ; petiole 

 terete, slender, pale green mottled with purple, sheathing at the 

 base. 



No. 2. Lanceolate, obtuse, entire, five-nerved and reticulate, 

 deep green above, glaucous beneath; petiole terete, pale green, 

 closely mottled and streaked with purple, sheathing at the base. 



No. 3. Lyrate-pinnatifid of seven segments ; segments Linear, 

 obtuse or subacute, glaucous-green suffused with purple, the lowest 

 pair smallest ; terminal segment much the largest, oblong-lanceo- 

 late, obtuse, irregularly serrate, penninerved and reticulate, glaucous- 

 green suffused with purple, glaucous beneath ; petiole terete, pale 

 green mottled and streaked with purple. 



Sonchus squarrosus, DC. 



Hypocotyl erect, terete, glabrous, 1-1*5 mm. long, light green 

 or colourless. 



Cotyledons oblong-obovate, obtuse, emarginate, petiolate, gla- 

 brous, light green, pinnatinerved like the leaves. 



Stem herbaceous, erect ; primary internodes undeveloped. 



Primary leaves simple, alternate, subrotund, obtuse, dentate - 

 serrate, with a few scattered bristly hairs above, glabrous beneath, 

 light green with a faint tinge of violet, pinnatinerved. 



Sonchus arvensis, L. 



Leaves simple, ultimately more or less pinnatifid and spiny- 

 toothed, thinly glandular-hairy or pubescent on both surfaces, at 

 least in the seedling stage. 



No. 1. Obovate-spathulate, entire, 1*7 cm. long. 



Nos. 2 and 3. Oblanceolate-spathulate, irregularly spiny-den- 

 ticulate. 



No. 4. Spathulate, subdecurrent on the petiole, with margin 

 undulate, spiny-toothed. 



No. 5. Spathulate -oblong, margin undulate, spiny- toothed. 



No. 6. Linear- oblong, sessile, broadest near the tip, tapering to 

 the base, irregularly doubly spiny-toothed. 



No. 7. Linear-oblong, lobulate and spiny-toothed, margin undu- 

 late, sessile, tapering to the base. 



Nos. 8 and 9. Linear-oblong, subpinnatifid with undulate, spiny- 

 toothed lobes. 



Zollikoferia sp. 



Hypocotyl erect, terete, glabrous, 6-10 mm. long, light green 

 or colourless. 



