OLEACE^ 107 



7. TRIENTALIS. Stab Flower. 



Sepals mostly 7, persistent; corolla rotate, without a tube; fila- 

 ments united at the base. Low glabrous perennial herbs with 

 slender erect stems, and ovate to lanceolate leaves clustered at the 

 top. 



1. T. americSna, (Pers.) Pursh. Star Floweh. 



Peduncles one or more, slender; flowers white, star-shaped; rootstook 

 slender, spreading. Woods about Lake Manitoba and eastward. 



LXVI. OLEACE.a; (Olive Family). 



Trees with opposite pinnate leaves; calyx 4-eleft or wanting; 

 stamens usually 2; ovary usually 2-celled with 2 ovules in each cell. 



1. FRAXINUS. Ash. 



, Flowers dioecious, monoecious, or polygamous; calyx small, 

 4-eleft, or obsolete; petals wanting in our species; stamens 2, 

 fruit a samara. Valuable timber trees. 



1. F. pennsylvinica. Marsh.;, var. 

 lanceolata, (Borkh.) Sarg. Gkeen 

 Ash. 

 Leaflets S-9, petioled, oblong to 



lanceolate, acute at the apex, green 

 on both sides ; flowers dioecious, the 

 calyx of the pistillate persistent ; an- 

 thers oblong ; fruit a samara, the 

 body round, winged for about half its 

 length and clearly distinguishable 

 from the wings. {F. viridis, Michx.) 

 Along streams, Man. north to Lat. ^^^ 70. — Fraxinus pennsylvanica. 

 54°, and S.E. Sask. to Meridian 110°. 



2. F. nigra, Marsh. Black Ash. 



Leaflets 7-11, lanceolate, serrate, sessile and rounded at the base, midrib 

 slightly hairy when young ; fruit flat, the body winged throughout, and the 

 wing and body not clearly distinguishable. A. large tree with hght but val- 

 uable timber. Low woods and swamps, N. and E. Man. and the Red River 

 Valley. 



