SPECIES AND VARIETIES. 233 



and the leaflets simply serrate ; flowers white, scentless, usually 

 3-4 together at the ends of the branches, rarely solitary ; fruit 

 globular or nearly so, without bristles, the calyx-divisions 

 mostly entire, and falling off before the fruit is ripe ; styles 

 united into a column protruding from the orifice of the calyx- 

 tube. — Hedges and thickets. Fl. June to August. 



(90) Sanguisorba. Great Burnet. 



S. oflS-cinalis : stem glabrous, erect, about two feet high ; 

 leaves chiefly radical, pinnate, with 9-13 ovate or oblong toothed 

 leaflets ; upper part of the stem almost leafless, divided into a 

 few long peduncles, each terminated by a single flower-head ; 

 flowers crowded, dark purple, the heads at first globular, be- 

 coming ovoid or oblong. — Moist meadows. Fl. June, July. 



(91) Poterium. Lesser or Salad Burnet. 



P. Sanguisorba : stem glabrous, seldom above a foot high ; 

 leaves pinnate; leaflets many, small, ovate, deeply-toothed; 

 flower-heads small, almost globular, light green, seldom 

 acquiring a purplish tinge, the lower flowers all male with 

 the numerous stamens projecting in hanging tufts, the upper 

 female with a long style ending in a purple tufted stigma. — 

 Dry pastures and limestone rocks. Fl. July. 



(92) TiUaBa. 



T. muscosa : stems 1-2 inches high, much branched, red- 

 dish, slender, succulent, crowded with flowers ; leaves narrow- 

 lanceolate or linear ; flowers solitary in each axil, or several 

 together in little clusters ; petals minute, subulate, white 

 tipped with red. — Moist barren sandy heaths and wastes. Fl. 

 June, Julv. 



