HYPERICACEAE 787 



tt Leaves narrowly linear or narrowly linear-spatulate. 17. H. galioides. 

 ft Leaves of the axillary clusters about as large as the main 

 pair ; blades subulate or linear-subulate^ fleshy, about 

 as thick as wide. 

 Sepals as long as the petals or fully % as long : leaves 



mostly over 10 mm. long. 18. H. fasciculatum. 



Sepals less than % as long as the petals : leaves mostly 



less than 10 mm. long. 19. H. aspcUathoides. 



** Sepals foliaceous. 



Leaf blades cordate-clasping. 20. H. myrtifolium. 



Leaf-blades more or less narrowed to the sessile or short-peti- 



oled base. 



Flowers sessile : buds ovoid-globose. 21. //. aureum. 



Flowers pedicelled : buds conic. 22. H. splendens. 



b. Capsules completely 3-celled. 

 Herbs. 



Corolla less than 15 mm. broad. 



Leaf-blades short- petioled or merely sessile, with a rounded base. 23. H. subpetiolatnm. 

 Leaf-blades sessile and more or less clasping. 24. H. maculatum. 



Corolla over 15 mm. broad. 



Upper leaves and bracts with ovate or ovate-lanceolate blades : 



petals spotted all over. 25. H. pseudomaculatum. 



Upper leaves and bracts with oblong blades: petals spotted 



around the edges. 

 Sepals and petals merely dotted : capsules usually less than 



6 mm. high. 26. H. perforatum. 



Sepals and petals striped with black : capsules usually over 



6 mm. high. 27. H. graveolem. 



Shrubs. 



Stems diffusely spreading or decumbent. 28. H. Buckleyi. 



Stems erect, relatively tall. 



Flowers few in narrow panicles : corolla over 1.5 cm. broad. 29. H. protiflcum. 

 Flowers numerous in rather corymb-like panicles : corolla less 



than 1.5 cm. broad. 30. H. densiflorum. 



B. Styles 5 : capsules 5-celled. 31. H. lobocarpum. 



1. Hypericum Canaidense L. Annual, slender. Stems 1-6 dm. tall, angled, nearly 

 simple or much branched : leaf-blades linear, obtuse or acutish, 3-nerved, tapering at the 

 base : cymes few, many-flowered, the branches often elongated : bracts subulate : sepals 

 lanceolate, 3-5 mm. long, acute or somewhat acuminate : corolla yellow, 7-9 mm. broad : 

 stamens 5-10 : styles 3 : capsules conic, 4-8 mm. long, acute, much surpassing the sepals. 



In moist sandy soil, Newfoundland to Manitoba, Georgia and Wisconsin. Summer. 



2. Hypericum mutilum L. Annual, slender. Stems 1-8 dm. tall, narrowly 4-winged 

 or 4-angled, simple below, or branched at the base or throughout : leaf-blades oblong-ovate 

 or the upper ones ovate, sometimes oblong, 0.5-2.5 cm. long, obtuse, entire, 5-nerved, ses- 

 sile and somewhat clasping, minutely punctate, glaucescent beneath : cymes open : bracts 

 subulate : sepals oblong or oblong-lanceolate, 3-3.5 mm. long, acute with several pellucid 

 nerves : corolla yellow, 7-9 mm. broad : petals oblong, about 3.5 mm. long, obtuse : stamens 

 5-12 : capsules ovoid to oblong, 2-3 mm. long, obtuse, surpassing the sepals. 



In low places. Nova Scotia to Manitoba, Florida and Texas. Summer and fall. 



3. Hypericum gymndnthum Engelm. &. Gray. Annual, glabrous. Stems 2-9 

 dm. tall, simple or sparingly branched above : leaf-blades firm, ovate, 0.5-2 cm. long, 

 acute or acuminate, or the lower ones obtuse, 5-7 -nerved, sessile, clasping : corymbs often 

 flat-topped, the cymes few-flowered : bracts subulate : flowers short-pedicelled : sepals lance- 

 olate, 3-4 mm. long, acuminate, nerved : corolla yellow, 4-5 mm. broad : stamens 10-12 : 

 capsules ovoid or oblong, about 4 mm. long, acute, as long as the sepals or usually surpass- 

 ing them. 



In moist places, New Jersey to Missouri, North Carolina, Louisiana and Texas. Summer. 



4. Hypericum virg&tum Lam. Perennial, herbaceous. Stems slender, 2-9 dm. tall, 

 4-angled, simple, or branched above : leaf-blades thinnish, oblong, or nearly so, 1-3 cm. 

 long, acute or acutish, flat or revolute, sessile : cymes dichotomous, forming terminal bracted 

 corymbs : bracts subulate, usually very slender : sepals more or less foliaceous, variable, 

 lanceolate, oblong-lanceolate or slightly broadest above the middle, but the outer broadest 

 at the base, 4-10 mm. long, acute or acuminate: corolla copper-yellow, 1-1.5 cm. broad : 

 capsules ovoid, 3-5 mm. long. [H. angulosum Michx.] 



In sandy soil or pine lands, New Jersey to Illinois and Florida. Summer. 



5. Hypericum acutifolium Ell. Perennial, glabrous, herbaceous. Stems simple or 

 branched, at the base, thence often simple to the inflorescence, 2-6 dm. tall, angled, usually 

 strict: leaf-blades narrowly lanceolate to linear-lanceolate, 1-2.5 cm. long, acute or slightly 

 acuminate, somewhat revolute, sessile : cymes forming several-flowered corymbs : sepals 

 linear to linear-lanceolate, not conspicuously imbricated at the base, 3.5-5 mm. long, acute 

 or acuminate, erect, the outer broadest about the middle : corolla copper-yellow, 15 mm. 



