256 POLEMONIACEAE 



1. Hydrophyllum Virginicum L. Virginia Water -leaf. (Man, 

 p. 763; I. F. f. 2gg6.') In woods, Quebec to Alaska, south to S. C, 

 Kans. and Wash. — Pennsylvania: Pike; Monroe; Northampton; 

 Bucks ; Delaware ; Chester ; Lancaster ; Franklin ; Hunting- 

 don ; Somerset ; Allegheny ; Erie. 



2. Hydrophyllum appendiculatum Michx. Appendaged WaTER- 

 LEAF. (Man. p. 763; I. F. /. 2998.) In woods, Ont. to N. C, Minn, 

 and Kans. — Pennsylvania : Lancaster ; Allegheny. 



3. Hydrophyllum Canadense L. Broad-lEaved Water-leaf, 

 (Man. p. 763; I. F. /. 2ggg.) In woods, Mass. to N. C, 111. and Ky. — 

 Pennsylva7iia : Bucks, Nockamixon ; Lancaster ; Sullfv^an ; Alle- 

 gheny. 



2. MACROCALYX Trew. 



1. Macrocalyx Nyctelea (L.) Kuntze. Nyctelea. (Man. p. 764; 

 I. F. /. 3001.) In moist soil, N. J. to Minn., the N. W. Terr., Va,, 

 Neb. and Kans. — Pennsylvania : Bucks ; Philadelphia ; Lancaster ; 

 York. 



3. PHACELLA. Juss. 



Corolla with entire or merely crenulate lobes. i. P. dubia. 



Corolla with fimbriate lobes. 2. P. Purshii. 



1. Phacelia dubia (L.) Small. Small-flowered Ph.^celia. (Man. 

 p. 765.; I. F. /. 3006.) In moist soil, Pa. to Ga., Kans. and Tex. — 

 Pennsylvania : Lancaster ; Perry. 



2. Phacelia Purshii Buckl. Pursh's Phacelia. (Man. p. 765; I. 

 F. f. 30og.) In moist woods or thickets, Pa. to Minn., N. C, Ala, 

 and Mo. — Pennsylvania : York ; Lancaster ; Fayette ; Washing- 

 ton ; Allegheny. 



Family 4. POLEMONIACEAE DC. Phlox Family. 



Capsule rupturing the normally distended calyx : leaves opposite. 



I. Phlox. 

 Capsule loosely enclosed in the calyx : leaves alternate. 2. Polemonium. 



1. PHLOX L. 



Leaves with dilated blades, sometimes narrow but not subulate. 

 Plants without prostrate and creeping sterile shoots. 

 Calyx-lobes shorter than the tube. 

 Calyx-lobes bristle-like, or bristle-tipped. i. P. paniculata. 



Calyx-lobes lanceolate to nearly triangular. 

 Calyx-lobes less than I'l as long as the tube. 2. P. niaculata. 



Calyx-lobes ^3 or M as long as the tube. 3. P. ovala. 



Calyx-lobes longer than the tube. 4. P. pilosa. 



Plants with prostrate or creeping sterile shoots. 



Leaf-blades of the sterile shoots of an elliptic or oblong type, sessile. 



5. P. divaricaia. 

 Leaf-blades of the sterile shoots of a spatulate type, petioled. 



6. P. reptans. 

 Leaves with subulate rigid blades. 7. P. subulata. 



