572 



HYPERICACEAE (ST. JOHN'S-WORT FAMILY) 



a. Petals yellow (at most mottled or striped with red, pu'ple, or black) b. 

 b. Styles 5; pods 5-celle(l. 



Tall herb; flowers 4-6 cm. broad ; pods 2-3 cm. long . , 1. H. Aaoyron. 

 Slender shrub; flowers 1.5-8 cm. broad ; pods 5-10 mm. long 8. H. Kalmia/)mm. 

 J. Styles 3, rarely 4 ; pods 3( 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 6. H. prolificum. 



Pods 5-8 mm. long 1. H. denaijlorum. 



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



e. 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 1.5-8 om. broad . 2. H. graveolens. 

 Flowers and leaves very numerous, the latter rarely 



1 cm. broad Z. H. perforatum. 



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



Leaves rounded at tip ; sepals blunt or acutish ; pods 



4-6 mm. long 4. H. punctatum. 



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



acuminate ; pods 6-8 mm. long . . . . b. H. pseudomaculaUnn 

 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 10. ^. adpreasum. 



Leaves and oblanceolate or obovate thin foliaceous 



sepals plane 14. ^. ellipticum. 



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

 stolons h. 

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

 bracted ; styles united below ; stigmas elongate i. 

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

 angled, essentially 1-celled. 

 Sepals 6-13 mm. long ; corolla 1.5-2 cm. broad. 

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

 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. H. cisUfolium. 

 i. Capsule conic-subulate, distinctly 3-celled . . 9. JI. galioideg. 

 h. Stems simple below the loosely "forking essentially 

 naked inflorescence, herbace"ous ; styles distinct ; 

 stigmas capitate . . . , . . . 15. iT. virgatum. 

 C Stamens 5-12 j. 

 J, Stem simple or loosely branched ; leaves- linear to ovate, 

 spreading Ir.. 

 k. Bracts of the inflorescence foliaceous, resembling reduced 



stem-leaves 16. S. horeale. 



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 11. H. muUlv/m. 



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

 conical IS. H. gym,nanthv>m. 



Leaves lanceolate to linear, merely sessile (if clasping 

 with lance-attenuate outline). 

 Leaves lanceolate, chiefly 5-7-nerved at base . . 19. H. majus. 



Leaves Hnear, 1-3-nerved 20. H. canadetise. 



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

 subulate, strongly ascending. 

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



caly.x 21. ^. Drummondii. 



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



exceeding the calyx 22. ZT. genUanoides. 



SI. Petals flesh-color or purplish. 



Leaves sessile or clasping 23. H. virginieum. 



Leaves narrowed to distinct petioles 24, J7. peUolaium. 



§ 1. ROSCYNA (Spach) Endl. Stamens very numerous, b-adelphous; styleu 

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

 back into the cells; perennial herb ; flowers very large. 



1. H. Ascyron L. (Great S.") Stems 5-15 dm, hiijh ; branches 2-4-angled ; 

 leaves 4-9 cm. long, ovate-oblong, partly clasping ; petals narrowly obovate, 2. 6 



