428 



ON SEEDLINGS 



Spinacia oleracea, Mill. 



Hypocotyl thickened upwards, 6-8 mm. long. 



Cotyledons subfleshy, unequal, linear, subacute, entire, sessile, 

 tapering to the base, glabrous, light green, distinctly one-nerved. 



Stem with primary internodes undeveloped. 



First leaves radical, opposite, afterwards alternate, broadly 

 ovate-oblong or oval, obtuse, shortly petiolate, glabrous, light 

 green, pinnatinerved ; petioles flattened, channelled on the upper 

 side, glabrous. 



Threlkeldia rostrata, ? F. Muell. (fig. 613). 



Hypocotyl erect, terete, pale green, minutely glandular-pubes- 

 cent, about l - 6 cm. above the soil. 

 Cotyledons linear, obtuse, 

 fleshy, pale green, sessile, minutely 

 glandular-pubescent, or slightly 

 hairy on the midrib beneath, 

 narrowed to the base and sub- 

 connate, 3 cm. long, 3*5 mm. 

 wide. 



Stem primarily erect, terete, 

 pale green, minutely glandular- 

 pubescent, ultimately subshrubby ; 

 1st internode 4'5 mm. long ; 2nd 

 5 mm. ; 3rd 4 mm. ; others simi- 

 lar. 



Leaves simple, entire, cauline, 

 alternate, sessile, minutely and 

 thinly glandular-pubescent, except 

 in the young state when the glan- 

 dular hairs are more numerous, 

 fleshy, pale green, slightly chan- 

 nelled, linear, obtuse, all similar 

 in the seedling, narrower than the 

 cotyledons. 



Nos. 1-30. Linear, obtuse, fleshy, narrow. 



Salsola Tragus, L. 



Hypocotyl slender, or wiry, erect, terete, glabrous, red, 2- 

 4-5 cm. above the soil. 



Cotyledons linear, obtuse, sessile, fleshy, semiterete, flattened 

 above, sheathing the plumule, that is connate at the base, frequently 

 both directed to one side, glabrous, 2'6-3'5 cm. long. 



FIG. GlS.Threlkeldia rostrat 

 Nat. size. 



