HYPERICACBAE (ST. JOHN'S-WORT FAMILY) 573 



cm. long, not deciduous until after they wither ; pod 2-3 cm. long, conical. — 

 Ba.nks of rivers, w. Que. to Man., s. to Pa., 111., Mo., and Kan. July, Aug. 



§ 2. EUHYPERICUM Boiss. Stamens very many, in 3 or 6 clusters; styles 3, 

 separate and usually diverging ; pod 3-celled; calyx erect; petals and an- 

 thers with black dots ; perennials. 



2. H. gravfiolens Buckley. (Mountain S.) Leaves elliptic-oblong, 5-7 cm. 

 long; flowers large, 2-5 cm. broad ; petals sparingly dotted on the margin ; pod 

 rather large, 7-10 mm. long. — Summits of the higher mts. of s. w. Va. and N. C. 



3. H. PEKF0RA.TUM L. (Common S.) Stem much branched and corymbed, 

 somewhat 2-edged, producing runners from the base ; leaves elliptic- or linear- 

 oblong, with pellucid dots ; petals deep yellow, black-dotted along the margin, 

 twice the length of the lanceolate acute sepals ; flowers numerous, in open leafy 

 cymes. — Fields, etc. June-Sept. — A pernicious weed, difficult to extirpate ; 

 juice very acrid. (Nat. from Eu. ) 



4. H. punctatum Lam. Conspicuously marked with both black and pellucid 

 dots ; stem terete, sparingly branched ; leaves oblong, rounded at tip, the base 

 either subclasping, sessile, or subpetiolate ; flowers crowded ; petals pale yellow, 

 marked with dark lines and dots, about twice as long as the oblong bluntish or 

 acute sepals; pods 4-6 mm. long. {H. maculatum Walt., not Crantz; II. corym- 

 bosum Muhl.) — Damp places, e. Que. to Ont., and southw. July-Sept. 



5. H. pseudomaculatum Bush. Similar ; leaves oblong-lanoeolate to ovate, 

 at least the upper narrowed to the tip ; petals three or four times as long as the 

 acuminate sepals; pods 6-8 mm. long. — Woods and prairies, 111. and Mo. to 

 Tex. and Ga. 



§ 3. MYRIAnDRA (Spach) Endl. Stamens very numerous, obscurely if at all 

 clustered; styles more or less united, the stigmas elongate ; pod more or less 

 3-6-celled; placentae central or parietal. 



* Bushy shrubs, 5-20 dm. high, leafy to the top. 

 -I- Styles 3 ; pod completely 3-celled. 



6. H. prolfficum L. (Shkubbt S.) Branchlets 2-edged ; leaves narrowly 

 oblong, 3-7 cm. long, mostly obtuse, narrowed at the base ; flowers numerous, 

 in simple or compound clusters ; pods subulate to ovoid, 1-1.5 cm. long. — N. J. 

 to s. Ont., Minn., and southw. July-Sept. — Varies greatly in size, etc. 



7. H. densiflbrum Pursh. Exceedingly branched above, 0.5-2 m. high, the 

 branches slender and crowded with smaller leaves ; flowers smaller (1.2-1.7 cm. 

 in diameter) and more numerous, in crowded compound cymes ; pod 5-8 mm. 

 long. — Pine barrens of N. J. to glades of Ky., Ark., and southw. 



H- -I- Styles 5 ; pod completely b-celled. 



8. H. Kalmianum L. (Kalm's S.) Branches 4-angled ; branchlets 2-edged ; 

 leaves crowded, glaucous, linear to oblanceolate, 3-4.5 cm. long ; flowers few in 

 a cluster, 3-5 cm. wide ; pods ovoid. — Rocky or sandy soil, Pontiac Co., Que., 

 to Niagara Falls, and along the Great Lakes to w. Ont., Mich. , and 111. 



* » Perennials, herbaceous or a little woody at base ; pod incompletely 3-^celled. 



9. H. galioides Lam. Slender, branching, woody below; leaves linear-ob- 

 lanceolate, narrowed downward, 1.5-7 cm. long, mostly acute ; flowers small in 

 terminal and axillary cymes ; sepals very narrow, 3-5 mm. long ; pod 5-6 mm. 

 long, ovoid. — Del. to Ga. and e. Tenn. 



10. H. adpr£ssum Bart. Stem simple, 3-6 dm. high, herbaceous, from a 

 slender creeping freely stoloniferous base, obscurely 4-angled below and 2-edged 

 above ; leaves ascending, lanceolate or linear-oblong, often acute, thin, 4-6 cm. 

 long ; cyme terminal, leafy at the base, few-flowered ; sepals linear-lanceolate ; 

 petals bright yellow, 7-10 mm. long ; pods ovoid. — Moist sandy shores, e. Mass. 

 to Pa., and southw., chiefly near the coast. July, Aug. Var. spon6i6sum Rob- 

 inson. Taller (7 dm. or more high), the stem spongy-thickened at base; leaves 

 oblong. — Marshy borders of ponds, s. e. Mass. 



