182 COMMON CANADIAN WILD PLANTS. 



3. F. Vir'idis, Michx. f. (GREEN ASH.) Glabrous through- 

 out. Fruit as in No. 2. Leaflets 5-9, bright green both sides. 

 Western Ontario and N.W., along streams. 



4. F. quadrangula'ta, Michx. (BLUE ASH.) Branch- 

 lets often square, smooth. Leaflets sharply serrate, green 

 both sides. Fruit narrowly oblong, of the same width at 

 both ends, often notched at the apex, wing-margined. 

 Lake Erie coast. 



* * Leaflets sessile. 



5. F. sambueifo'lia, Lam. (BLACK or WATER ASH.) 

 Branchlets and petioles smooth. Xieaflets 7-9, sessile, serrate. 

 Fruit winged all round. Calyx wanting, and the flowers 

 consequently naked. Swamps. 



III. APET'ALOUS DIVISION. 



Flowers destitute of corolla, and sometimes also of 

 calyx. 



ORDER LXXIII. ARISTOLOCHIA'CE^. (BIRTHWORT F.) 



Herbs with perfect flowers, the tube of the 3-lobed calyx 

 adherent to the 6-celled many-seeded ovary. Leaves heart- 

 shaped or kidney-shaped, on long petioles from a thick 

 rootstock. Stamens 12 or 6. Flowers solitary. Calyx dull- 

 coloured, the lobes valvate in the bud. 



AS' ARUM, Tourn. WILD GINGER. 



A. Canaden'se, L. Radiating stigmas 6. Leaves only a 

 single pair, kidney-shaped, and rather velvety, the peduncle 

 in the fork between the petioles, close to the ground. Boot- 

 stock aromatic. Calyx brown-purple inside, the spreading 

 lobes pointed. Rich woods. 



ORDER LXXIV. PIPERACE>E. (PEPPER FAMILY.) 



A small family having, with us, but a single representa- 

 tive: 



