358 CLASS XXI. ORDER II., III. 



Anther sessile. Germ surrounded with four leaves, and followed 

 by a many seeded berry. — July. 



368. ZOSTERA. 

 ZosTERA MARINA ? L. Eel Gruss. Sea Wrack. 



Pericarps sessile. Sm. 



The plant, usually denominated Ed grass in this section of the 

 the country, and continually thrown ashore in large quantities 

 by the sea, is probably the Zostera of Europe. The leaves are 

 very long, linear, obtuse, and when carefully broken, discover a 

 multitude of fine internal filaments. The fructification said to 

 grow on a spadix at the base of the leaves, I have never been able 

 to discover. 



DIANDRIA. 



369. LEMNA. 

 Lemna minor. L. Duck Meat. 



Leaves sessile, nearly flat on both sides ; root soli- 

 tary. L. 



This minute plant, resembling a small floating scale, multi- 

 plies extensively in stagnant ponds and ditches, frequently giv- 

 ing a green appearance to their whole surface. The leaves, 

 which constitute most of the plant, cohere two or three together, 

 are small, ovate, entire, smooth, and slightly convex under- 

 neath. Root long, solitary, undivided, terminating in a small 

 sheath. Flowers minute, proceeding from a marginal fissure. 



TRIANDRIA. 



370. ERIOCAULON. 

 Eriocaulon pellucidum. Mich. Transparent Pipewort. 

 Glabrous; leaves subulate, channelled, pellucid, 

 five nerved ; stem solitary ; head somewhat apple- 

 shaped ; involucre hardly distinct, with obtuse scales. 

 Mich. abr. 



