50 CLASS III. ORDER III. 



ate; panicle slender, pyramidal; flowers alternate, 

 pedicelled. 



About the size of the last, but more hairy, and its clusters 

 more naked. — Dry fields. — July, August. 



65. MOLLUGO. 

 MoLLUGO vERTiciLLATA. L. Carpet toced. 



Leaves whorled, wedge-form, acute; stem subdi- 

 vided, decumbent ; peduncles one flowered. L. 



A small, flat, spreading plant common in cultivated ground. 

 Stems prostrate, jointed, simple, or compound, giving off at each 

 joint a whorl of wedge-shaped or spatulate leaves, and a few 

 small flowers on simple footstalks. — Flowers at midsummer and 

 after. — Annual. 



56. PROSERPINACA. 

 Proserpinaca PALusTRis. L. Spcar Icavcd Proscrpinaca. 

 Lower leaves subpinatifid or cut-serrate ; the rest 

 linear-lanceolate, sharply serrate. Mich. 



An aquatic, remarkable for its very hard, triangular, axillary 

 fruit. The leaves stand alternately on the stem, are narrow, 

 pointed, with very acute serratures. When the plant grows in 

 the water, its immersed leaves are cut into linear segments. 

 Flowers two or three in the axil of each leaf. Nut bony, three 

 sided, three celled. — Found in meadows and ponds. — June, July, 



Proserpinaca pectinata. Lam. Fine leaved Proserpinaca. 



Leaves all pectinate. 



This is a smaller species than the foregoing, and by some is 

 thought a variety. Leaves all pinnatifid, with linear segments. 

 Angles of the fruit somewhat obtuse. — Gathered in low grounds 

 at Plymouth by Mr. Tuckerman. — July, August. 



