220 LYTHRACEAE 



2. Elaeagnus argen ea Pursh. Buffalo or Rabbit-berry. (Man. 

 p. 647 ; I. F. y. 2§jS.) Manitoba and Minn, to Saskatchewan, Kaus. and 

 Nev. Adv. eastward. — Pennsylvania : Delaware. 



Order 22. MYRTALES. 



Style present, simple or compound : stigma terminal. 



Anthers opening by pores. Fam. i. Melastomaceae. 



Anthers opening by longitudinal valves. 



Hypanthium merely enclosing the ovary. Fam. 2. Lythraceae. 



Hypanthium adnate to the ovary or mainly so. Fam. 3. Oxagraceae. 



Style wanting: stigmas sessile. Fam. 4. Haloragidaceae. 



Family i. MELASTOMACEAE R. Br. Meadow Beauty Family. 

 1. RHEXIA L. 



Stems terete : leaf-blades relatively narrow, mainly short-petioled. 



I. R. Jfariana. 

 Stems angled : leaf-blades relatively broad, mainly sessile. 2. i?. Virffinica. 



1. Rhexia Mariana L. Maryland Meadow Beauty. (Man. p. 651; 

 I. T./. 2j^i.) In swamps or low grounds, L. I. to Fla., Ky., Mo., and Tex. 

 — Pennsylvania : Bucks, Bristol. 



2. Rhexia Virglnica L. Meadow-Be.a.uty. DeerGrass. (Man. p. 

 651 ; I. F. /. 2JJ2.) In sandy swamps. Me. to Fla., 111., Mo. and La. — 

 Pennsylvania : Monroe, Pocomo ; Bucks ; Delaware ; Chester ; 

 Lycoming; Carbon; Lancaster; York; Perry; Franklin. 



Family 2. LYTHRACEAE Lindl. Loosestrife Family. 



Flowers regular: hypanthium not oblique. 



Hypanthium hemispheric, turbinate or campanulate. 

 Herbs : flowers mostly solitary in the axils : capsules septicidal. 



I. ROTALA. 



Shrubs : flowers in axillary cymes : capsules loculicidal. 2. Decodon. 

 Hypanthium cylindric. 3. Lythrum. 



Flowers irregular : hypanthium oblique. 4. Parsonsia. 



1. ROTALA L. 



1. Rotala raraosior (L.) Koehne. Rotala. (Man. p. 649 ; I. F. /. 

 ^543 ■) In swamps, Mass. to Fla., 111., Neb., Tex. and Mex. Also in 

 Calif., Ore., S. Am. and the W. I. — Pennsylva7iia : Delaware; Ches- 

 ter ; Lancaster, on Susquehanna ; Franklin, Chambersburg. 



2. DECODON J. F. Gmel. 



1. Decodon verticlllatus (L.) Ell. Swamp Willow-herb or 

 Loosestrife, (Man. p. 649 ; I. F. / 2^44.) In swamps. Me. to Fla., 

 Ont., Minn., Ky. and La. — Pennsylvania : Northampton ; Pike ; Car- 

 bon ; Berks ; Luzerne ; Delaware ; Dauphin ; Franklin ; Craw- 

 ford ; Erie. 



