HYPERICACEAE 787 
tt Leaves narrowly linear or narrowly linear-spatulate. 17. H. galioides. 
Tf 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 4% as long: leaves 
mostly over 10 mm. long. 
g 18. H. fasciculatum. 
Sepals less than 14 as long as the petals: leaves mostly 
less than 10 mm. long. 19. H. aspalathoides. 
** 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. H. aureum. 
Flowers pedicelled : buds conic. 22, H. splendens. 
b. Capenles completely 3-celled. 
erbs. 
Corolla less than 15 mm. broad. 
Leaf-blades short-petioled or merely sessile, with a rounded base. 23. H. subpetiolatum. 
Leaf-blades sessile and more or less clasping. 24. H. maculatum. 
Corolla over 15 mm. broad. 
Upper leaves and braets 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 peta s merely dotted : capsules usually less than 
1g. 
6mm, h. 26. H. perforatum. 
Sepals and petals striped with black: capsules usually over 
6 mm. high. 27. H. graveolens. 
Shrubs. 
Stems diffusely spreading or decumbent. 28. H. Buckleyi. 
Stems erect, relatively tall. . 
Flowers few in narrow panicles: corolla over 1.5 em. broad. 29. H. prolificum. 
Flowers numerous in rather corymb-like panicles : corolla less . 
than 1.5 em. broad. 30. H. densiflorum. 
B. Styles 5: capsules 5-celled. 31. H. lobocarpum. 
. 1. Hypericum Canadénse 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 mitilum 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 
9-12 : 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. 
S. Hypericum gymnánthum 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: 
ere 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 virgàtum Lam. Perennial, herbaceous. Stems slender, 2-9 dm. tall, 
4-angled, simple, or branched above: leaf-blades thinnish, oblong, or nearly so, 1-3 em. 
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 acutifóültum 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 em. long, acute or slightly 
acuminate, somewhat revolute, sessile: cymes formin several-flowe corymbs : sepals 
linear to linear-lanceolate, not conspicuously imbricated at the base, 3.5-5 mm. long, acute 
or acuminate, erect, the outer eonait about the middle: corolla copper-yellow, 15 mm. 
