GENUS 2. 



ST. JOHN'S-WORT FAMILY. 



5 2 9 



hypogynous glands. Ovary i-celled, with 3-5 parietal placentae which sometimes project far 

 into the cavity, or 3-5-celled (rarely 6-celled); ovules o, generally numerous; styles 3-6. 

 Capsule i-5-celled (rarely 6-celled). [The Greek name.] 



About 210 species, of wide geographic distribution. In addition to the following, 12 others 

 occur in southern and western North America. Type species : Hypericum perforatum L. 



* Styles 5; large perennials; pods 5-celled. 



Flowers \'-z' broad; capsules g"-io" long; plant herbaceous. i. H.Ascyron. 



Flowers 6"-iz" broad ; capsules 3"-6" long ; plant shrubby. z. H. Kalmianum, 



** Styles 3 (rarely 4). 



t Tall leafy shrubs. 

 Flowers numerous, 4"-8" wide ; pods completely 3-celled. 



Flowers 6"-8" broad ; pods 4"-6" long. 3. 



Flowers 4"-6" broad ; pods 2" -3" long. 4. 



Flowers few or solitary, i'-z' wide ; pods incompletely 3-ceH'ed. 5. 



tt Herbaceous, sometimes woody at the base. 

 t Stamens numerous (15-40) ; flowers $"iz" broad. 

 Capsules i -celled or incompletely 3~4-cel!ed. 



Capsules incompletely 3-4-celled by the projecting placentae. 

 Leaves linear, i"z" wide. 

 Leaves oblong, 3" 5" wide. 

 Capsules strictly i -celled ; placentae parietal. 



Styles united into a beak, separate above ; stigmas minute. 

 Leaves linear or linear-oblong ; seeds transversely rugose. 

 Nearly simple, erect ; pod globose. 

 Branched, decumbent ; pod 3-sided. 

 Leaves elliptic ; seeds minutely pitted and striate. 

 Styles separate ; stigmas capitate ; cyme naked. 

 Capsules completely 3-celled ; styles separate. 



Leaves linear or oblong ; sepals lanceolate ; introduced. 

 Leaves broadly oblong, oval or ovate-lanceolate ; native species. 

 Sepals ovate to ovate-lanceolate. 



Leaves obtuse ; sepals acute ; petals z''$" long. 

 Leaves acute; sepals acuminate; petals 5" 10" long. 

 Sepals lanceolate; petals s"-7" long; leaves obtuse. 



tt Stamens few (5-12) ; flowers ^"-3" broad. 

 Leaves spreading or ascending, 3-7-nerved. 

 Cyme leafy-bracted. 

 Cymes subulate-bracted. 



Leaves ovate, oval, oblong or lanceolate, 5-7-nerved. 

 Leaves ovate, oval or oblong; capsule i"z 1 /^" long. 



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



Leaves acute, or only the lower obtuse ; sepals long-acuminate. 18. H.gymnanthum. 

 Leaves lanceolate or oblong-lanceolate; capsule 4" -5" long. 19. H.majus.. 



Leaves linear, obtuse, 3-nerved. 20. H. canadcnse. 



Leaves linear, erect, i-nerved. 21. H. Drumtnondii. 



i. Hypericum Ascyron L. Great 



or Giant St. Johri's-wort. 



Fig. 2881. 



Hypericum Ascyron L. Sp. PI. 783. 1753. 

 Hypericum pyramidatum Ait. Hort. Kew. 

 3: 103. 1789. 



Perennial, herbaceous, erect, 2-6 

 high, branching, the branches often 

 nearly erect, angled. Leaves sessile, 

 clasping, ^ovate-oblong or ovate-lanceo- 

 late, 2'-s' long, i'-i^' wide, obtuse or 

 acute; cymes terminal, few-flowered; 

 flowers bright yellow, i'-2 r broad ; pedi- 

 cels stout, i'-2' long; sepals ovate-lan- 

 ceolate, 4"-6" long, acute ; petals obo- 

 vate or oblanceolate, tardily deciduous; 

 styles usually 5, united below; stigmas 

 capitate ; stamens numerous, united in 5 

 sets ; capsule ovoid, Q"-IO" long ; cells 3. 



Banks of streams, western Quebec and 

 Vermont to Manitoba, south to Connecticut, 

 New Jersey, Pennsylvania, Illinois. Iowa, 

 Missouri and 1 Kansas. Also in northern 

 Europe and Asia. July-Aug. 



H. prolificum. 

 PI. densiflorum. 

 H. aureum. 



6. H. galioides. 



7. H. adpressnm. 



8. H. cistifolium. 



9. H. dolabriforme. 



10. H. ellipticum. 



11. H. virgatitm. 



12. H. perforatum. 



13. H.punctatum. 



14. H.pseudomaculatum. 



15. H. graveolcns. 



1 6. H. borealc. 



17. H. mutiluin. 



