147. 
Hypericum 
1, Flowers flesh-color or mauve, clustered in axils and 
top of stem. Expected (H. virginicum). 
1, Flowers yellow, in terminal cymes. 
2. Stamens 20-100 or more. 
3. Stamens in 3 to 5 clusters; styles 3; capsules, 
petals, sepals, and leaves with black dots or 
lines (oil vesicles), leaf dots may also be 
translucent. 
4, Plant very branched; leaves very numerous, 
elliptic-linear, usually with axillary 
fascicles on whole stem and branches; 
petals with black marginal dots; sepals 
5-6 mm. long, acuminate... .ccccescovcceseeeee He perforatum 
4, Plant branched only at summit for cyme; 
leaves remote, elliptic-ovate, seldom with 
axillary fascicles except on upper stem 
near cymes; petals with black lines; sepals 
2-3 mm. long, acute or blunt......eeceoeeeeee H. punctatum 
3. Stamens not in clusters; styles united into 
a sharp beak; capsules, petals, sepals, and 
leaves without oil vesicles or black markings. 
Expected (H. densiflorum). 
2. Stamens 5 to 12, if up to 20 the flowers are 
very small. 
5. Leaves spreading, not linear-subulate. 
6. Leaves ovate-deltoid or round-oblong, the 
upper cordate or clasping at base..........+. H. mutilum 
6. Leaves lanceolate or linear to narrowly 
obovate, tapering to sessile or short- 
petioled base. Expected (H. canadense). 
5. Leaves appressed or strongly ascending, linear-subulate. 
Expected (H. gentianoides). 
