300 Karl M. Wiegand and Arthur J. Eames 



2. H. Trionum L. Flower-of-an-hour. 



A weed in rich gravelly cultivated fields and gardens, and on railroad banks, in 

 calcareous districts ; generally scarce but locally abundant. Aug.-Sept. 



Inlet Valley, opposite Lick Brook, abundant ; C. U. campus, near the Old 

 Armory, 1884 (D.) ; Forest Home; Renwick; near Esty Glen; field near Crowbar 

 Point, abundant in 1916; Taughannock Point; Levanna to Farley Point (D.l). 



N. S. to S. Dak., southw. to Fla. and Kans. Native of s. Eu. 



87. HYPERICACEAE (St. John's-wort Family) 



1. Hypericum (Tourn.) L. 



a. Petals yellow, convolute in the bud. 



b. Styles 5 ; capsule 5-celled ; petals 25 mm. long ; leaves 4—9 cm. long. 



1. H. Ascyron 

 b. Styles 3 ; capsule 3-celled ; petals 2-15 mm. long ; leaves 5 cm. long or less. 

 c. Stamens very numerous ; petals 5-15 mm. long. 

 d. Petals 10—15 mm. long; leaves 1-2.5 cm. long. 2. H. perforatum 



d. Petals 5 mm. long; leaves 2-5 cm. long. 3. H. punctatum 



c. Stamens 5-12; petals 2-3 mm. long; plants smaller. 

 d. Leaves scale-like or linear-subulate. 4. H. gcntianoldes 



d. Leaves linear to ovate, foliaceous. 



e. Branching diffuse; leaves ovate or oval. 5. H. tnutilum 



e. Branching strict, erect ; leaves lanceolate to linear. 



/. Leaves lanceolate, acutish, rounded, or subcordate, and clasping at the 

 base, 5-7 -nerved ; sepals 5-7 mm. long, nearly equaling the pod. 



6. H. majus 



f. Leaves linear, spatulate, obtuse, attenuate at the base, 1-3-nerved ; 

 sepals 2.5-5 mm. long, much shorter than the pod. \H. canadeiise] 

 a. Petals purplish flesh-color, imbricated in the bud ; leaves ovate-oval. 



7. H. virginicum 



1. H. Ascyron L. Great St. John's-wort. 



Damp alluvial river banks in rich soil or on gravel bars, in limy regions (?); 

 scarce. July 15-30. 



Apparently confined to Cascadilla and Fall Creeks : above Judd Falls (D.) ; head 

 of Eddy Pond (D.) ; below Genung's mill (D.) ; opposite Cascadilla Place (D.) ; 

 Fall Creek, near Varna, 1871 (Dr. Jordan]); island at Forest Home; below the 

 lower bridge in Forest Home; Beebe Lake (D.) ; behind Sibley College; Ren- 

 wick woods (D. !). 



W. Que. to Man., southw. through Vt. and N. Y. to Pa., 111., Mo., and Kans. 

 A plant primarily of the richer soils of the Mississippi Basin. 



2. H. PERFORATUM L. COMMON St. JOHN'S-WORT. 



A weed in dry sandy or gravelly grassy fields, on roadsides, and in waste places, 

 in run-out acid or neutral soils ; very common, and generally distributed. July-Aug. 

 Widely naturalized in N. A. Native of Eu. 



3. H. punctatum Lam. (H. maculatum of Cayuga Fl.) 



Chiefly in moist places along paths, fence rows, and open woods, in rich gravelly 

 or loamy acid or neutral soils ; frequent, and generally distributed. July-Aug. 



E. Que. to Minn., southw. to Fla., Kans., and Tex. ; much less common on the 

 Coastal Plain. 



