786 HYPERICACEAE 
2. CROOKEA Small. 
Weak branching shrubby plants, with the habit of species of Ascyrum. Leaves numer- 
ous, nearly equal throughout the plant: blades narrow, obtuse. Flowers solitary at the 
ends of the branches, or clustered. Sepals 4, in slightly unequal pairs, the members of 
both pairs differing very little either in size or shape. Petals 4, yellow, quite unequal in 
size or shape, fully twice as long as the sepals. Stamens numerous: filaments distinct. 
Glands none. Ovary 1-celled : styles 3, coherent, but at length separating. Capsule much 
longer than the sepals. Seeds numerous. 
1. Crookea microsépala (T. & G.) Small. A branching shrub, with decumbent 
or ascending stems. Leaves numerous ; blades cuneate to linear-cuneate or narrowly ob- 
long, 6-14 mm. long, rounded at the apex, often slightly revolute, sessile : flowers showy, 
2-2.5 cm. broad : sepals 4, linear to oblong, obtuse : petals 4, yellow, unequal, the smaller 
oblong, the larger obovate, obtuse : stamens numerous, distinct : capsules oblong, 7-8 mm. 
long, much surpassing the sepals: seeds oblong, less than 1 mm. long, striate and pitted. 
LAseyrum mierosepalum T. & G., Hypericum microsepalum (T. & G.) A. Gray. ] 
In sandy soil, southern Georgia and Florida. Spring. 
3. HYPERICUM L. 
Showy shrubby plants or herbs, with erect or depressed stems. Leaves opposite : blades 
usually thickish, commonly sessile or clasping, entire or nearly so, more or less punctate. 
Flowers solitary, or in more or less compound cymes. Sepals 5, slightly unequal. Petals 
5, yellow, smooth and glabrous, oblique, convolute. Stamens numerous: filaments distinct, 
or more or less united at the base and aggregated into 3-8 groups without hypogynous 
glands. Ovary 1-celled, with 3-5 parietal placentae or 3-5-celled: styles 3-5, sometimes 
coherent. Capsule tapering upward. Seeds numerous, variously marked. ST. JoHN's-WORT. 
Stamens few or several, 5-12, usually in 3 clusters. 
Leaf-blades linear. 1. H. Canadense. 
Leaf-blades ovate, oval or oblong. : 
Sepals obtuse or somewhat acute : leaf-blades obtuse. 2. H. mutilum. 
Sepals acuminate : leaf-blades acute. . 8. H. gymnanthum. 
Stamens numerous, 15-40, distinct or in clusters: capsules 3-5-celled or with 
intruding placentae. 
A. Styles 3 or rarely 4: capsules 3-celled or with 3 more or less intruding 
placentae. 
a. Capsules 1-celled or incompletely 3-celled. 
Capsules with parietal placentae, 1-celled, 
Styles distinet: stigmas capitate. 
Foliage glabrous: sepals not ciliate. 
Sepals conspicuously imbricated, at least the outer broadest : 
at the Due : leaf-blades broadest about the middle. 4. H. virgatum. 
Sepals not conspicuously imbricated, at least the outer 
broadest about the middle: leaf-blades broadest about 
the base. 5. H. acutifolium. 
RE hapan: tormentas: sepals ciliate. R 6. H. setosum. 
es coherent, at leas ow: stigmas minute. 
Corolla over 18 mm. broad : capsules over 6 mm. high. 7. H. dolabriforme. 
Corolla less than 18 mm. broad : capsules less than 6 mm. high. * 
Capsules broadest at the top, about as long as the sepals. 8. H. turgidum. 
Ca xm pe ct "D Les Aiea 9. H. i 
s obtuse: seeds striate and p: i . H. opacum. 
Sepals acute or acutish : seeds transversely wrinkled. 10. H. sphaerocarpum. 
Capsules psa gente É 3-celled by the intrusion of the placentae. 
* Sepals very small or at least not foliaceous. 
ere never in conspicuous axillary clusters ; blades relatively 
Sepals obtuse or merely acutish. 
Sepals less than 14 as long as the petals: capsules 6-7 mm. 
long. 11. H. nudiflorum. 
Sepai hE as long as the petals: capsules 12-13 mm. 12. H. apocynifolium. 
Sepals manifestly acute or acuminate. 18. H. adpressum. 
Leaves in conspicuous axillary clusters; blades narrow. 
+Leaves of the axillary clusters mostly much smaller than 
v "x I i vade erae pubon; not Fabs. is 
ymes in terminal conges corymbs: bu road 
ovoid : mountain species. : 14. H. glomeratum. 
Cymes in elongated narrow panicles: buds conic : low- 
land species. 
p linear-oblong, spatulate o iairy age dii 
Sepals oblong to lanceolate, not narrowed & 15. H. interior. 
d edi : dn * 
see tte to enipapalte amore tg iu 
