124 THE FLORA OF THE ALPS 



B. Flowers subtended by three bracts; calyx rolled 

 up to the base after flowering, one-third as long as the 

 fruit: — T. montanum^ Ehrh. ; stem erect, iJ-2 ft., leaves 

 linear-lanceolate, acuminate, dark blue-green ; thickets, 

 frequent. T. linophylluin, L. (including humifusum, 

 DC, intermedium^ Schrad., and divaricatum^ DC), 

 stem prostrate, leaves linear, acute, yellowish - green ; 

 open hill-sides ; Switzerland, Jura, Pyrenees, local. 



C. Flowers subtended by three bracts ; calyx rolled up 

 only at the tip after flowering, equal to or longer than 

 the fruit: — T. alpinum, L. ; stem prostrate, 4-6 in., 

 branching on one side only, flowers in a dense terminal 

 unilateral raceme; alpine pastures, frequent. T. tenui- 

 folium^ Saut. ; resembling the last, but stem more erect, 

 flowers in a bilateral panicle; Switzerland, local. T. 

 pratense, Ehrh.; stem prostrate, 6-12 in., branching on 

 all sides, very flexuose ; pastures, com.mon. 



Order LXXVH.— LORANTHACE^. 



Flowers unisexual or bisexual ; sepals thick, 4-8 ; 

 stamens 4-8; ovary entirely inferior, i -celled, i-ovuled; 

 ovules very rudimentary ; fruit a I -seeded berry; leaves 

 usually opposite, coriaceous. Woody evergreen plants, 

 parasitic on trees. A moderately large order, of Tro- 

 pical and Temperate climates ; very few in Europe ; not 

 alpine. 



I. ViSCUM, L. 

 Flowers small, green, dioecious; leaves opposite, entire, 

 yellowish -green ; stem jointed, brittle ; fruit a very viscid 

 berry. 



