360 



ROSACEAE 



Nearly throughout the area, except in the pine-barrens and the 

 area immediately surrounding them, there rare or wanting; not 

 on known L. I. or S. I. 



4. G. rotundifolia (Michx.) Coville & Britton (Ribes rotundi- 

 folium Michx.). In rocky woods: Mass. to N. Y. and N. 

 Car. 



Conn. Meriden, Southington and Salisbury. 

 N. Y. Formerly on L. I., reported from S. I.; unknown in the 



Bronx; Westchester Co., increasing northward. 

 N. J. Monmouth Co., rare; frequent north of the coastal plain. 

 Pa. Wayne, Bucks and Schuylkill counties. 



G. missouriensis (Nutt.) Coville & Britton (Ribes gracile Pursh) has been reported 

 from a roadside in Conn. I have seen no specimens. 



PLATAN AC EAE 

 1. Platanus [Tourn.] L. 

 1. P. occidentalis L. Along streams and in wet woods: N. 

 Hamp. to Ont. and Neb., south to Fla. and Tex. 

 Throughout the area, except in the pine-barrens. 



ROSACEAE 



Fruit consisting of 1-5 dehiscent follicles. 



Carpels alternate with the sepals, or less in number; stipules 

 none or deciduous. 

 Carpels 1-5, if more than one united below; seeds shining. I. Opulaster. 

 Carpels 5, distinct; seeds dull. 



Stamens inserted on the margin of the hypanthium; 



flowers perfect; shrubs with simple leaves. 2. Spiraea. 



Stamens inserted on the inside o f the hypanthium; 



flowers dioecious; herbs with compound leaves. 3. Aruncus. 



Carpels opposite the sepals; stipules present, persistent. 



Petals obovate or spatulate; leaves pinnately compound. 4. Schizonotus. 

 Petals strap shaped; leaves ternately compound. 5. Porteranthus. 



Fruit consisting of indehiscent achenes or drupelets. 

 Carpels not enclosed in a fleshy hypanthium. 

 Fruits consisting of dry achenes. 



Ovules 2, one above the other; perennial herbs with 



pinnately dissected leaves. 6. Filipendula. 



Ovules and seeds solitary. 



Seeds inserted at the point where the style- 

 arises. 

 Style articulated to the ovary; flowers 

 cymose or solitary. 

 Style terminal or nearly so, ovules 



pendulous. 7. Potentilla. 



Style lateral, ovules ascending. 



