HYPERICACEAE, 223 



Family 2. HYPERICACEAE Lindl. St. John's-wort Family. 



Sepals 4 in unequal pairs; petals 4. 1. Ascyrum. 

 Sepals and petals 5. 

 Petals yellow. 



Leaves normal, not reduced to scales. 2. Hypericum. 



Leaves reduced to minute appressed scales. 3. Sarothra. 



Flowers pink or greenish-purple. 4. Triadenum. 



1. ASCYEUM L. 



Erect, 3-6 dm. high; styles 3 or 4. 1. A. stans. 



Diffusely branched, 1-2.5 dm. high; leaves sessile; styles 2. 



2. A. hypericoides. 



1. Ascyrum stans Michx. St. Peter's-wort. M. p. 625. Dry soil. Sum- 



mer. 

 Bucks— Bristol (Ca.). 



New Jersey — Common in wet pine-barrens. 

 New CostZe— Town send, Tainall and Canby. 



2. AsCYEUM HYPERICOIDES L. St. Andrew 's-cross. M. p. 625. Dry, sandy 



soil. Summer. 



PTiiJode^p/iio— Wissahickon (Me.) (Re.). Bucks— Bristol, Mart. (B. 

 C), Penn Valley (Wn.). Delaware— Media, Middletown (Fu.), Lewis' 

 Mills, Crum Creek (B. Sm.), Concord (W. Tr.). C/tes^er— North Valley 

 Hill opposite Thorndale and Paoli (St.). Lancaster— Little Britain Twp. 

 (Pr.). 



New Jersey — Common in pine-barrens. 



New Cast Ze— Frequent. 



2. HYPERICUM L. St. John's-wort. 



Styles 5; large perennials; pods 5-celled. 1. R. Ascyron. 



Styles 3 (rarely 4). 



Tall, leafy shrubs; pods 3-ceUed. 



Flowers 12-16 mm. broad; pods 8-12 mm. long. 2. H. prolificum. 

 Flowers 8-12 mm. broad; pods 4-6 mm. long. 3. H. densifloruyn. 

 Herbaceous, sometimes woody at the base. 



Stamens numerous (15-40) ; flowers 6-25 mm. broad. 

 Capsules 1-celled or incompletely 3-4-celled. 



Capsules incompletely 3-4-celled by the projecting pla- 

 centae. 4. H. adpressum. 

 Capsules strictly 1-celled; placentae parietal. 



Styles united into a beak, separate above; stigmas 



minute. 5. E. ellipticum. 



Styles separate; stigmas capitate; cyme naked. 



6. H. virgatum. 

 ; Capsules completely 3-celled ; styles separate. 



Leaves linear or oblong ; sepals lanceolate. 



7. H. perforatum. 

 Leaves broadly oblong, oval, or ovate-lanceolate. 



8. H. maculatum. 

 Stamens few (5-12) ; flowers 1-6 mm. broad. 



Leaves obtuse; sepals linear-oblong, acutish or obtuse. 



9. H. mutilum. 

 Leaves acute, or only the lower obtuse; sepals long-acuminate. 



10. H. gymnanthum. 

 Leaves linear, obtuse, 3-nerved. 11. H. Canadense. 



