UMBELLIFER^E 33 



to the interior of the mericarp, and adhering to it; testa thin, 

 membranous, brown, inseparable from the pericarp ; hilum and 

 micropyle contiguous, basal, at the upper end of the seed. 



Endos^ierm in the mature seed copious, fleshy, firm, white. 



Embryo minute, straight, colourless, embedded in the endosperm 

 close to the basal end of the seed; cotyledons oblong, obtuse, 

 entire, plano-convex, lying in the centre of the endosperm, with 

 their backs to the central axis of the fruit, and their edges to its 

 compressed sides ; radicle oblong-terete, obtuse, about as thick and 

 as long as the cotyledons. 



FIG. 411. Ptycliotis Ajowan, x 24. A, longitudinal section of fruit : PC, peri- 

 carp ; T, testa ; P, endosperm ; E, embryo ; Stl, stylopodium. B, trans- 

 verse section of fruit : P, endosperm ; Cs, cotyledons. 



Seedling (fig. 412). 



Primary root small, colourless unbranched (at first). 



Hypocotyl herbaceous, 3-4 cm. long, less than 1 mm. thick, 

 glabrous, pale green. 



Cotyledons 2-25 cm. long including the petiole ; 2-2-5 mm. 

 wide, lanceolate, tapering at the base, subacute at the apex, entire, 

 with obscure midrib, glabrous, thin, light green ; petiole long and 

 slender. 



Stem very short, glabrous, light green ; 1st internode 3-4 mm. 

 long, -75 mm. thick. 



Leaves simple, radical and cauline, alternate, exstipulate, petio- 

 late, ultimately ternately or pinnately multisect, with acute seg- 

 ments, glabrous, light green ; petioles semiterete, channelled above, 

 glabrous. 



II. D 



