572 HYPERIOACEAE (ST. JOHNS-WORT FAMILY^ 



a. Petals yellow (at roost mottled or striped with red, purple, or black) b. 

 b. Styles 5; pods 5-celled. 



Tall herb ; flowers 4^6 cm. broad ; pods 2-3 cm. long . 1. 17. Asei/ron. 



Slender shrub ; flowers 1.5-3 cm. broad ; pods 5-10 mm. long 8. //. Kalmia^ium 

 h. Styles 3, rarely 4 ; pods S(rarely 4)-celled c. 

 c. Stamens very numerous (more than 12) d. 

 d. Shrubs, 0.5-2 m. high. 



Pods 1-1 .5 cm, long ^. H. prolificftim. 



Pods 5-8 mm. long 1. E. demiflorvm. 



d. Herbs, at most slightly woody at base e. 



6. Stamens in 3-5 clusters ; petals marked with black dots 

 or lines /. 

 /. Petals bearing black dots only on the margin. 



Flowers and leaves few, the latter 1.5-3 cm. broad , 2. ff. graveolens. 

 Flowers and leaves very numerous, the latter rarely 



1cm. broad 3. H. perforatum. 



f. Petals bearing several rows of black dots or lines. 



Leaves rounded at tip ; sepals blunt or acutish ; pods 



4r-6 mm. long 4. H. punctata m. 



Leaves (at least the upper) narrowed to the tip ; sepals 



acuminate ; pods 6-8 mm. long .... 5. S. pseudomacmlatum 

 e. Stamens obscurely if at all clustered; petals without black 

 dots g. 



g. Stems herbaceous, from slender creeping freely stolonif- _ 



erous bases. 

 Leaves and linear-lanceolate acute firm sepals with 



revolute margins . . . . l(i. B, adpreasicm. 



Leaves and oblanceolate or obovate thin foliaceous 



sepals plane 14. 5". elUpHcum. 



Q. Stems woody at base, or if herbaceous without slender 

 stolons h. 

 k. Stems freely branching, woody at base ; cymes leafy- 

 bracted ; styles united below ; stigmas elongate i. 

 i. Capsxile thick-ovoid to subglobose, somewhat 3- 

 angled, essentially 1-celled. 

 Sepals 6-18 mm. long ; corolla 1.5-2 cm. broad. 

 Sepals 6-10 mm. long, 2-5 mm. broad . . 11. H. dolahriforme. 

 Sepals variable, the larger 1-1.3 cm. long, 6-8 



mm. wide 12. ^. Bissellii^ 



Sepals 3-5 mm. long ; corolla 1-1.5 cm. broad 13. //. cUtifoliwm. 



i. Capsule conic-subulate, distinctly 3-celled . . 9. ff. galioidea. 

 h. Stems simple below the loosely forking essentially 

 naked inflorescence, herbaceous ; styles distinct ; 

 stigmas capitate 15.-5". virgatum. 



0. Stamens 5-12 J. 



j. Stem simple or loosely branched ; leaves linear to ovate, 

 spreading Jr,: 

 k. Bracts of the inflorescence foliaceous, resembling reduced 



stem-leaves 16. JST. boreaie. 



k. Ultimate bracts of the Inflorescence setaceous to linear- 

 subulate. 

 Leaves orbicular, ovate-deltoid, or rounded-oblong, 

 clasping. 

 Leaves ovate-oblong or short-elliptic, rounded at tip ; 



pod short-ellipsoid VI. U. muUlum. 



Leaves ovate-deltoid, acutish or blunt ; pod slender- 

 conical 18. .ff. gymnanffium. 



Leaves lanceolate to linear, merely sessile (if clasping 

 with lance-attenuate outline). 

 Leaves lanceolate, chiefly 5-T-nerved at base . . 19. ff. inajus. 



Leaves Hnear. 1-3-nerved 20. .ff^. ca-nadense. 



j. Stems fastigiately branched ; leaves scale-like or linear- 

 subulate, strongly ascending. 

 Leaves 6-20 mm. long; pods ovoid, slightly exceeding the 



calyx 21. .ff. Dnimmondii. 



Leaves shorter, scale-like; pods lance-subulate, much 



exceeding the calyx 22. i7. gentianoides. 



d. Petals flesh-color or purplish. 



Leaves sessile or clasping . 23. .ff. virginicum. 



Leaves narrowed to distinct petioles ... . . 24. R.pmolatum. 



§ 1. r6SCYNA (Spach) Endl. Stamens very numerous, 5-adelphous; styles 



5, united below, the stigmas capitate; pod ^-celled, the placentae turned far 

 back into the cells; perennial herb; flowers veiy large, 



1. H. Ascyron L. (Great S.) Stems 5-16 dm. high ; branches 2-4-angled ; 

 leaves 4-9 cm. long, ovate-oblong, partly clasping ; petals narrowly obovate, 2.5 



