latum agree, except in being rather smaller, while those of L. 

 monogynum (fig. 227) and L. Leoni are very much larger. 

 Those of the latter are entire or inclined to be slightly emargi- 

 nate, fleshy, and indistinctly trinerved. 



Linum perenne, L. 



Hypocotyl erect, terete, glabrous, white below ground and pur- 

 plish-brown above it, 1*5 cm. long. 



Cotyledons oval, obtuse, entire, tapering 

 to a very short petiole, glabrous, deep green, 

 often stained brown, about 5 '25 mm. long 

 including the petiole, 3'2o mm. wide. 



Stem herbaceous, erect, terete, glabrous, 

 minutely scabrous, pale green or brownish ; 

 internodes very short, 1st and 2nd unde- 

 veloped ; 3rd 4 mm. long ; 4th 1 mm. long ; 

 5th -75 mm. ; 6th, 7th, &c., 1 mm. long. 



Leaves simple, entire, radical and cauline, 

 alternate, exstipulate, sessile, or slightly 

 narrowed to the base, deep glaucous green, 

 glabrous, subfleshy, one-, ultimately three- 

 nerved, minutely scabrous at the margin, 

 convex on the back, slightly concave above by 

 reason of the upturned margins. 



Nos. 1 and 2. Decussating with and close 

 to the cotyledons, appearing opposite, linear- 

 oblong, obtuse, or subacute. 



Nos. 3-20. Linear-oblong, obtuse, alter- 

 nate, separated by short internodes, minutely 

 scabrous beneath, one-nerved. 



Ultimate leaves on barren shoots linear, 

 obtuse, generally minutely cuspidate, one- 

 or obscurely three-nerved, subfleshy ; on flowering shoots linear, 

 acute, rather elongated, trinerved. 



Linum monogynum, Forst. (fig. 227). 



Primary root a long tap-root, colourless, unbranched in its early 

 stages. 



Hypocotyl as in L. perenne, about 2 cm. long, 1 mm. thick, firm. 



Cotyledons subsessile, 1-5 cm. long, about 1 cm. broad, rotund- 

 obovate, trinerved, entire, glabrous, thin, light greyish-green. 



Stem like the hypocotyl ; 1st internode I mm. ; 2nd undeveloped ; 

 3rd 2 cm. 



U 



FIG. 227. 



Linum monogynum. 

 Nat. size. 



