6j0 



fLuti/i. 



Leaves imear or linear-oblong ; seeds transversely rugose. 



Nearly simple, erect; pod globose. 7. 11. sphaerocarpum. 



Branched, decumbent; pod 3-sided. 8. //. dolabriforme. 



Leaves elliptic; seeds minutely pitted and striate. 9. H. ellipticum. 

 Styles separate; stigmas capitate ; cyme naked. 10. 11. virgatum. 



Capsules completely 3-celled; styles separate. 



Leaves linear or oblong; sepals lanceolate. n. H. perforatum. 



Leaves broadly oblong, <>val or ovate-lanceolate. 

 Sepals ovate. 



Petals 4-6 mm. long. 12. 11. maculatum. 



Petals 15-20 mm. long. 13. H. pseudomaculatum. 



Sepals lanceolate; petals 10-14 mm. long. 14. //. graveolens. 



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

 Leaves spreading or ascending, 3-7-nerved. 



Cyme leafy-bracted. 15. II. boreale. 



Cymes subulate-bracted. 



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



Leaves ovate, oval or oblong; capsule 2-5 mm. long. 



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



16. //. mtitilum. 

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



17. H. gymnanthum. 

 Leaves lanceolate or oblong-lanceolate; capsule 8-10 mm. long. 



18. H. ma jus. 

 Leaves linear, obtuse, 3-nerved. 19. H. Canadense. 



Leaves linear, erect, i-nerved. 20. H. Drummondti. 



i. Hypericum Ascyron L. Great or Giant St. John's-wort. (I. F. f. 

 2444.) Perennial, 6-18 dm. high, the branches angled. Leaves sessile, clasping, 

 ovate-oblong or ovate-lanceolale, 5-13 cm. long; cymes terminal, few-flowered; 

 flowers bright yellow; pedicels 1-5 cm. long; sepals ovate-lanceolate, 8-12 mm. 

 long, acute; petals obovate or oblanceolate; styles united below; stamens nume- 

 rous, united in 5 sets; capsule ovoid, 5 -celled. Banks of streams, Quebec and Vt. 

 to Manitoba, Conn., N. J., 111. and Kans. Also in Europe and Asia. July-Aug. 



2. Hypericum Kalmianum L. Kalm's St. John's-wort. (I. F. f. 2445.) 

 Shrubby, 3-6 dm. high, leafy; branches 4-angled; twigs flattened and 2-edged. 

 Leaves oblong-linear or oblanceolate, sessile, or narrowed into a short petiole, 

 obtuse, 2-6 cm. long, more or less glaucous beneath, generally with smaller ones 

 clustered in the axils; cymes terminal, few flowered; pedicels 4-20 mm. long; 

 sepals foliaceous, oblong, acute, 6-8 mm. long; stamens very numerous, distinct; 

 styles 5 (4-6), united below; capsule ovoid, 6 mm. long, 5- (4-6-) celled. Ont. and 

 western N. Y. to 111., Wis. and Mich. Aug. 



3. Hypericum prolificum L. Shrubby St. John's wort. (I. F. f. 2446.) 

 Shrubby, 3-9 dm. high; branchlets 2-edged. Leaves linear-oblong or oblanceo- 

 late, narrowed at the base, or tapering into a short petiole, obtuse, often mucronu- 

 late, pale beneath, 2-8 cm. long, with tufts of smaller ones in the axils; cymes 

 t uninal and sometimes also axillary; pedicels 12 mm. long or less; stamens 

 numerous, distinct; capsules 3-celled. Sandy or rocky soil, N. J. to Ky. and Ga. 

 July -Sept. 



4. Hypericum densiflorum Pursh. Bushy or Dense-flowered St. John's- 

 wort. (I. F. f. 2447.) Erect, 1-2 dm. high, shrubby; branchlets 2-edged. Leaves 

 crowded, 2-5 cm. long, with smaller ones clustered in the axils; cymes densely 

 man v- flowered, mainly terminal; pedicels 2-8 mm. long; sepals narrow, not foli- 

 aceous; stamens numerous, distinct; capsule 3-celled. Pine-barrens of N. J. to Fla., 

 Tenn.. Ark. and Tex. July-Sept. 



5. Hypericum galioides Lam. Bed-straw St. John's-wort. (I. F. f. 

 2448.) Perennial, somewhat woody, 3-8 dm. high, the branches nearly terete. 

 Leaves linear, linear- oblong or oblanceolate, with smaller ones clustered in their 

 axils, obtusish, thick, spreading, narrowed below, 1-5 cm. long, involute in dry- 

 ing; flowers short pedicelled, 6-10 mm. broad; sepals resembling the uppermost 



stamens numerous, distinct; capsule 4-6 mm. long. In low grounds, Del. 

 to Fla., Tenn. and La. July-Sept. 



6. Hypericum adpressum Part. Creeping St. John's-wort. (I. F. f. 

 244<>.) Stems nearly simple, 3-6 dm. high, hedged above. Leaves oblong or 



