572 



HYPERICACEAE (ST. JOHN S-WORT FAMILY) 



a. Ppt-als yellow (at most mottled or strijied with red, jmiple, or ])laek) f>. 

 b. Styles 5 : iHids 5-celled. 



Tall herb ; tlowers 4-1) cm. broad ; pods 2-;i cm. lontr 1, 



Slender shiub ; flowers 1.5— 3 cm. broad; i)od.s .V-Ki mm. long ?. 

 &. Styles 3, rarely 4 ; pods 8( 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. 



Pods 5-8 mm. long 7. 



d. Herbs, at mo.st shghtly woody at base e. 



e. Stamens in '6-b clusters ; petals marked with black dots 

 or lines /. 

 f. Petals bearing black dots only on the margin. 



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

 Flowers and leaves very numerous, the latter rarely 



1 cm. broad . ". .3. 



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



Leaves rounded at tip ; sepals blunt or acutish ; pods 



4-6 mm. long ........ 4. 



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



acuminate; pods 6— S mm. long .... 5. 



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

 dots g. '^ 



g. Stems herbaceous, from slender creeping freely stolonif- 



eroiis bases. 

 Leaves and linear-lanceolate acute tirm sepals with 



revolnte margins 10. 



Leaves and oblanceolate or obovate thin foliaceous 



sepals plane 14. 



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. Cap.sule thick-ovoid to subglobose, somewhat 3- 



angled, essentially 1 -celled. 



//. AxcyroJi. 

 II. Kalmianum. 



IT. prolificum. 

 II. Jeitfiiilorum. 



IT. graveolens. 

 IT. perforatum. 



IT. punctaUim. 



H. pseudomaculaiutn. 



IT. adpressum. 

 IT. ellipticujn. 



a. 



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

 Sepals (>-10 mm. l{)ng, 2-5 mm. broad 

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



mm. wide 



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

 i. Capsule conic-subulate, distinctly 3-celled 

 h. Stems simple below the loosely forking essentially 

 naked inflorescence, herbaceous : styles distinct ; 

 stigmas capitate . . . . " . 

 C. Stamens 5-12 j. 

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

 spreading k. 

 k. Bracts of the inflorescence foliaceous, resembling reduced 

 stem-leaves . . . . , .... 

 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 



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

 conical 



Leaves lanceolate to linear, merely sessile (if clasping 

 with lance-attenuate outline). 

 Leaves lanceolate, chiefly 5-T-nerved at base 



Leaves linear, 1-3-nerved 



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

 subulate, strongly ascending. 

 Leaves 0-20 mm. long; pods ovoid, slightly exceeding the 



caly.t 



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



exceeding the calyx 



Petals flesh-color or pur{»lish. 



Leaves sessile or clasi)ing 



Leaves uarrowed to distinct petioles 



11. H. dolahriforme. 



12. H. BUseUii. 



13. //. cintifoHum. 

 9. //. galioides. 



15. H. virgatum. 



16. IT. horeale. 



17. n. mutilum. 



IS. IT. gymnanthum. 



19. H. 7naju.<i. 



20. //. eanadense. 



21. a. Drummondii. 



22. II. gentianoides. 



23. IT. rirghiicnm. 



24. H. petiolatum. 



§ \. ROSCVNA (Spach) Endl. Stamens very numerous, 5-adeIphous ; styles 

 ;"), aaii.pd ItHow, the stigmas capitate; pod ^)-ceUed, the placentae turned far 

 hark i)it(> the cells; perennial herb ; floioers very lar(fe. 



1. H. Ascyron L. (Great iS.) Stems 5-15 dm. hidi ; branches 2-4-angled ; 

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



