314 



ON SEEDLINGS 



FIG. 555. Linaria Cymbalaria. 

 Nat. size. 



Stem herbaceous, trailing, terete, thinly pubescent, green or 

 purplish, brittle, succulent ; 1st internode 6 mm. long. 



Leaves alternate (first four to six in opposite pairs, but developing 

 unequally from the bud), thinly pubes- 

 cent in seedling stage but glabrous or 

 almost so in the adult plant, green or 

 stained with purple on the under side, 

 and especially the petioles ; petioles 

 slightly channelled on the upper side, 

 subterete, thinly pubescent in the 

 seedling stage, glabrous or almost so 

 in the adult stage, green or purplish. 



First pair cordate-reniform, mucro- 

 nate, shallowly three- to five-crenate, 

 obscurely trinerved. 



Second pair cordate, rather acutely 

 five- to seven-toothed, obscurely five- 

 nerved. 



Ultimate leaves alternate on the 

 trailing stems and branches, reniform, 

 five- to seven-nerved, with five to seven large, rounded, mucronate 

 crenatures on the lower and larger leaves, and five to seven tri- 

 angular or ovate, deep, acute teeth on the smaller and upper leaves. 



Linaria tristis, Mill. 



Hypocotyl colourless, becoming proliferous at the surface of the 

 ground, and throwing out from one to many buds which develop 

 into branches with verticillate leaves, three to four in the first 

 whorl, 1-5-2 cm. long. 



Cotyledons cuneate-linear, narrowed gradually to the base, con- 

 stricted above the middle or towards the apex, and appearing tri- 

 dentate there with the lateral teeth rudimentary and the terminal 

 subulate, obtuse or subacute, opaque, deep subglaucous-green and 

 convex above, paler beneath and concave, 9-12 mm. long, 2 - 5-3 mm. 

 wide immediately beneath the constriction where they are widest. 



Stem herbaceous, erect, terete, glabrous, pale green ; 1st internode 

 3-9 mm. long ; 2nd shorter. 



Leaves verticillate, narrowed to the base but scarcely petiolate, 

 glabrous, deep opaque green or glaucous above, paler beneath. 



First whorl of four leaves linear, obtuse, flat or subrevolute at 

 the margins, glaucous in the seedling. 



Second whorl very frequently consisting of five leaves similar to 

 the first. The whorl sometimes consists of four leaves. Occasionally 



