434 



HYPERICACEAE. 



[VOL. II. 



14. Hypericum boreale (Britton) 



Bicknell. Northern St. John's- 



wort. (Fig. 2457.) 



Hypericum Canadense var. boreale Britton, Bull. 



Torr. Club, 18: 365. 1891. 

 H. boreale Bicknell, Bull. Torr. Club, 22: 213. 1894. 



Annual, stem terete or slightly 4-angled, up- 

 right from a usually assurgent base, simple or 

 branched, I'-iS' high. Leaves elliptic, oval, 

 oblong, or linear-oblong, 3 // -i6 // long, \"-t(" 

 wide, sessile or slightly clasping, obtuse, mostly 

 3-nerved, those of the lower part of the stem 

 commonly much smaller than the upper and 

 closer together; cymes few-several-flowered, 

 leafy-bracted; flowers about 2^" broad; sepals 

 narrow, obtuse; capsules oblong, obtuse or ob- 

 tusish, apiculate, 2 // -2# // long, purple, cross- 

 wrinkled, longer than the sepals; seeds 3-5 

 times as long as wide, pale, longitudinally fur- 

 rowed and finely cross-lined. 



In wet soil, Newfoundland to New Jersey and 

 Pennsylvania. July-Sept. 



15. Hypericum mutilum L,. Dwarf or Small-flowered St. John's- wort. 



(Fig. 2458.) 



Hypericum mutilum L. Sp, PI. 787. 1753. 

 Ascyrum Crux-Andreael*. Sp. PI. 787. 1753. 



Annual, slender, erect or ascending, gener- 

 ally tufted, abundantly branched, 6'-2}4 high. 

 Brauchlets 4-angled; leaves oblong or ovate, 

 sessile, clasping, obtuse, 4 // -i4 // long, 2"-7" 

 wide, s-nervcd at the base; cymes many-flow- 

 ered, terminal, subulate-bracted; pedicels slen- 

 der, i "-6" long; flowers #"-2" broad, light 

 orange yellow; sepals foliaceous, linear, lanceo- 

 late or oblanceolate, much shorter than or 

 slightly longer than the petals; stamens 5-12; 

 styles 3; capsule ovoid, pointed, i-celled, i"- 

 2" long, somewhat longer than the sepals. 



In low grounds.Nova Scotia to Manitoba, Florida 

 and Texas. Ascends 3000 ft. in Virginia. July-Sept. 



16. Hypericum gymnanthum Engelm. 



& Gray. Clasping-leaved St. John's- 



wort. (Fig. 2459.) 



Hypericum gymnanthum Engelm. & Gray, Bost. 



Journ. Nat. Hist. 5: 212. 1847. 

 Hypericum mutilum \z.\ . gymnanthum A. Gray, 



Man. Ed. 5. 86. 1867. 



Annual, erect, simple or sparingly branched, 

 io'-3 high. Leaves ovate, or the lower oval, 

 cordate-clasping, often distant, 4 // -io // long, 

 2 // -4 // wide, acute, or the lower obtuse, 3-7- 

 nervedat the base; cymes terminal, loose, subu- 

 late-bracted; flowers numerous, \"-i" broad; 

 sepals lanceolate, acuminate, equalling or shorter 

 than the petals and generally somewhat shorter 

 than the i-celled ovoid capsule; styles 3; stamens 

 10-12; capsule about 2" long. 



In low grounds, southwestern New Jersey and Delaware to Minnesota, south to Louisiana and 

 Texas. July-Sept. 



