514 



ON SEEDLINGS 



including petiole 8'5 mm. long, 6 mm. wide ; larger cotyledon in- 

 cluding petiole 1*1 cm. long, 8 mm. wide. 



Stem succulent, erect, 

 perennial or shrubby, terete, 

 minutely pubescent ; 1st in- 

 ternode 5-8- 5 mm. long ; 

 2nd 1-4-1-8 cm. ; 3rd about 

 1-9 cm. 



Leaves simple, cauline, 

 opposite, decussate, exstipu- 

 late, petiolate or subsessile, 

 glabrous, succulent, deep 

 green above, paler beneath, 

 covered on both surfaces 

 with gland-like organs 

 secreting a white substance ; 

 petioles flattened above, 

 convex beneath, connate at 

 the base around the stem. 



First pair rotund-spath- 

 ulate or spathulate-elliptic, 

 obtuse. 



Second pair oval or 

 rotund-oval, obtuse, cuneate 

 at the base. 



Third pair oblong, ob- 

 tuse. 



Fourth pair rotund, ob- 

 tuse. 



These forms vary greatly in individual seedlings. 

 Ultimate leaves oblong, very obtuse, faintly nerved, or ovate-oblong 

 or rotund, shortly petiolate, covered on both sides with glands secret- 

 ing a white substance ; petioles short, convex beneath, and grooved 

 on the upper side. 



Sedum Rhodiola, DC. (fig. 333). 



Primary root slender, tapering, with a few lateral rootlets, soon 

 equalled, or even superseded, by strong adventitious roots from the 

 base of the hypocotyl. 



Hypocotyl short, glabrous, soon becoming ovoid or globose, and 

 forming the primary rootstock of the plant, colourless or purplish, 

 2-5 mm. long, 2-4 mm. thick. 



Cotyledons variable, ovate or rotund-ovate, obovate or elliptic, 



FIG. 832. Craseula quadrifida. 

 Nat. size. 



