180 



OX SEEDLINGS 



obtuse, with ascending petioles, from 8-4 mm. long, finely ciliated ; 

 midrib indistinct. 



Stem apparently none. 



Leaves radical, petiolate ; the first one is ovate, obtuse, cordate 

 at the base, crenate, ciliate and covered with small hairs, light 

 green ; midrib with numerous branched lateral veinlets. 



Primula vnlgaris, Ends. (fig. 498). 



Primary root behaving differently in different soils. In silver 

 sand a number of specimens examined penetrated the soil per- 



PIQ. 498. Primula vulgaris. A, grown in sand. Nat. size. 

 B, grown in loam and sand, x 2. 



pendicularly. In loam with a mixture of sand the radicle or base 

 of the hypocotyl bends or becomes procumbent in many instances 

 before penetrating the soil. In some cases it soon ceases to 

 elongate and throws out strong lateral rootlets furnished with an 

 abundance of root-hairs. 



Hypocotyl erect (at least primarily), terete, densely clothed 

 with a glandular pubescence, pale green, throwing out strong 

 adventitious roots at its base with an abundance of root-hairs. 



