JVNCACEAE. 93 



2. TRADESCANTIA L. *■ 

 1. Tradescantia Virginiana L. Spiderwort. M. p. 241. Rich Boil. Summer. 



Family 4. PONTEDEEIACEAE Dumort. Pickerel- weed Family. 



Flowers 2-lipped, stamens 6; fruit a 1-seeded utricle. 1. Poiitederia. 



Mowers regular; stamens 3; fruit a many-seeded capsule. 2. Reterantherai. 



1. PONTBDERIA L. 

 1. Pontederja oordata L. Pickerel-weed. M. p. 243. Borders of ponds 

 , and streams. Summer. 



Id. Pontedekia cokdata lancipolia (Muhl.) Morong. M. p. 243. BordeiB 

 of ponds and streams. Summer. 

 Philadelphia— Delaware river near the city, (Orj). Lehigh— (P.). 

 Burlington— Quaker Bridge (C), Atsion (Fr.).' Gloucester— Franklin 

 (C.), Washington Park (Ja.). 



2. HETERANTHERA R. & P. 

 Leaves mostly reniform, sometimes cordate-ovate. , 1. S. reniforirm. 



Leaves linear, grass-like, floating. 2. H. dubia. 



1. Heteranthera REniformis R. & P. Mud Plantain. M. p. 243. Mud 



Or shallow water. Summer. 



2. HeteranThera dubia (Jacq.) MacM. M. p. 243. Stillwater. Summer. 



Order 6. LILIALES. 



Ovary superior (except in Aletris of the Liliaceae). 



Perianth-segments distinct, green or brown, not petal-like; herbs with 



grass-like leaves and small flowers. Fam. 1, Juncaceae. 



Perianth-segments distinct, or partly united, at least the inner petal-like. 

 Fruit a capsule. 



Capsule mostly septicidal; plants rarely bulbous. 



1 Fam. 2. Melanthaceae. 

 Capsule loculicidal; plants mostly bulbous. 



Fam. 3. Liliaceae. 

 Fruit a fleshy berry. 



Erect herbs, tendrils none ; flowers perfect. 



Fam. 4. Convallariaceae. 

 Vines, climbing by tendrils, or rarely erect; flowers dioecious, 

 in axillary umbels. Fain.' 5. Smilaceae. 



Ovary inferior, wholly or in part. 



Stamens 3, opposite! the inner corolla-segments. 



Fam. 6.' Haemodoraceae. 

 Stamens 6. 



Erect perennial herbs; flowers perfect. Fam. 7. Amaryllidaceae. 

 Twining vines; flowers dioBcious. Fam. 8. Dioscoreaceae. 



Stamens 3, opposite the outer corolla-segments. 



Fam. 9. Iridaceae. 



Family 1. JUNOACEAE Vent. Rush Family. 



Leaf -sheaths open; capsule 1-3-oelled, many-seeded; placentae parietal or 

 1 axial. , .,' ,., ' .' 1. Juncus. 



Leaf sheaths ' close'd;" capsule 1-celled, 3-seeded, its placenta basal. 



2. Juncoides. 



