LABURNUM: BROOM 159 



(a) Leaflets 3 8 cm. long, silky -pubescent 

 beneath, as are also the young shoots : the 

 latter not angular or furrowed. Stipules 

 evident and persistent. 



Cytisus Laburnum, L. Laburnum. Small tree, with 

 silky-pubescent young shoots, and tufts of distinctly tri- 

 foliolate leaves on long (3 4 cm.) petioles. Leaflets on 

 short petiolules; 3 8 x 1'5 3 cm., elliptic, entire, acute 

 or mucronate, green and glabrous above, paler and silky- 

 pubescent beneath, and especially silvery silky when 

 young. Stipules persistent, filamentous, small, free. 

 Leaves opening early: autumn leaves yellow. Venation 

 of leaflets pinnate. 



(/3) Leaflets not more than 1 2 cm. long. 

 Shoots angular and furrowed, glabrous. 

 Stipules minute. 



Sarothamnus Scoparius, Koch. Broom (Fig. 34). 

 Switch plant, with erect, angular and furrowed, glabrous 

 shoots, bearing trifoliolate leaves below on distinct petioles, 

 and sessile, obovate to lanceolate, entire, unifoliolate leaves 

 above. Leaflets elliptic or obovate, silky-pubescent when 

 young, especially beneath, then glabrescent, 10 15 x 3 6 

 mm., dark green. Stipules minute. Venation simple. 

 The leaves on some branches reduced to minute scales 

 or obsolete. Dead leaves brown. 



(ii) Leaves not silky, with prickles on the 

 petioles and ribs; leaflets large, coarse, and 

 irregularly serrate. 



(a) Prickles setaceous, deflexed but unequal, 

 and not curved and claw -like ; shoots 

 prostrate, terete, and glaucous. Leaflets 

 pale green on both sides. 



