228 MELANTHACEAE 



2. J. nemorosum (Poll.) Kuntze. A European species known in 



North America only as a naturalized plant at Riverdale, 

 N. Y. City; and at Niagara. 



3. J. campestre (L.) Kuntze. In woodlands and meadows: 



throughout the U. S. and Canada. Also in Europe and Asia. 

 Common throughout the range except the pine-barrens. 



Juncoides bulbosum (Wood) Small has been collected on the serpentine barrens at 

 Nottingham, Chester Co., Pa., according to Pennell. 



MELANTHACEAE 



Flowers numerous in terminal, erect, racemes or panicles. 

 Anthers oblong or ovate, 2-celled. 

 Anthers introrsely dehiscent. 



Capsule septicidal ; flowers involucrate by 3 bractlets. 

 Capsule loculicidal; flowers not involucrate. 

 Anthers extrorsely dehiscent. 

 Flowers perfect. 



Stem very leafy; leaves linear; seeds few. 

 Leaves basal; seeds numerous. 

 Flowers dioecious; stem leafy. 

 Anthers cordate or reniform, confluently I -celled. 

 Plants glabrous. 



Perianth segments not gland bearing. 

 Perianth segments bearing 1-2 glands. 

 Stem and inflorescence pubescent. 



Perianth segments clawed, free from the ovary. 

 Perianth segments not clawed, adnate to the base of 

 the ovary. 

 Flower solitary, terminal or opposite the leaves, usually drooping. 



i. Tofieldia Huds. 

 1. T. racemosa (Walt.) B. S. P. In pine-barren swamps: N. J. 

 to Fla. and Ala. 



N. J. Rare, known only from Lakehurst, Ocean Co. and Chats- 

 worth, Burlington Co. 



Tertiary, Confined to Beacon Hill: Cretaceous, o: Older Forma- 

 tions, o: Not north of the moraine. 168-182 days. About sea 

 level. 



2. Abama Adans. 



1. A. americana (Ker) Morong. In pine-barren swamps: N. J. 

 and Del. 

 N. J. Throughout the pine-barrens in favorable situations. 



Tertiary, confined to Beacon Hill: Cretaceous, o: Older Forma- 

 tions o. Not north of the moraine. 168-220 days. About sea 

 level. 



