Contains 34 accepted taxa overall.
Characteristics
Classification
Citation
HYPERICUM Linnaeus, Sp. Pl. 783. 1753.
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TYPE: Hypericum perforatum Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 529. 1913.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Hypericum apocynifolium | EARLY ST.JOHN'S-WORT | Native | ||
| Hypericum brachyphyllum | COASTALPLAIN ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum canadense | LESSER CANADIAN ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum chapmanii | APALACHICOLA ST.JOHN'S-WORT | Native OBL (NWPL) OBL (DEP) | ||
| Hypericum cistifolium | ROUNDPOD ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum crux-andreae | ST.PETER'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum cumulicola | HIGHLANDS SCRUB ST.JOHN'S-WORT; HIGHLANDS SCRUB HYPERICUM | Native Rare-State Endangered-US | ||
| Hypericum denticulatum | COPPERY ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum drummondii | NITS-AND-LICE; DRUMMOND'S ST.JOHN'S-WORT | Native FACU (NWPL) | ||
| Hypericum edisonianum | ARCADIAN ST.JOHN'S-WORT; EDISON'S ST.JOHN'S-WORT; EDISON ASCYRUM | Native Rare-State OBL (NWPL) OBL (DEP) | ||
| Hypericum exile | FLORIDA SANDS ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum fasciculatum | SANDWEED; PEELBARK ST.JOHN'S-WORT | Native FACW (NWPL) OD (WAP) OBL (DEP) | ||
| Hypericum frondosum | CEDARGLADE ST.JOHN'S-WORT | Native FACW (DEP) | ||
| Hypericum galioides | BEDSTRAW ST.JOHN'S-WORT | Native OBL (NWPL) FACW (DEP) | ||
| Hypericum gentianoides | PINEWEEDS; ORANGEGRASS | Native FACU (NWPL) | ||
| Hypericum gymnanthum | CLASPINGLEAF ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum harperi | HARPER'S ST.JOHN'S-WORT | Native FACW (DEP) | ||
| Hypericum hypericoides | ST.ANDREW'S-CROSS | Native FAC (NWPL) FAC (DEP) | ||
| Hypericum lissophloeus | SMOOTHBARK ST.JOHN'S-WORT | Native Rare-State OBL (NWPL) OBL (DEP) | ||
| Hypericum microsepalum | FLATWOODS ST.JOHN'S-WORT | Native FAC (NWPL) | ||
| Hypericum mutilum | DWARF ST.JOHN'S-WORT | Native FACW (NWPL) T (WAP) FACW (DEP) | ||
| Hypericum myrtifolium | MYRTLELEAF ST.JOHN'S-WORT | Native FACW (NWPL) T (WAP) FACW (DEP) | ||
| Hypericum nitidum | CAROLINA ST.JOHN'S-WORT | Native OBL (NWPL) OBL (DEP) | ||
| Hypericum nudiflorum | EARLY ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum prolificum | SHRUBBY ST.JOHN'S-WORT | Native FAC (NWPL) | ||
| Hypericum pseudomaculatum | FALSE SPOTTED ST.JOHN'S-WORT | Native | ||
| Hypericum punctatum | SPOTTED ST.JOHN'S-WORT | Native FAC (NWPL) | ||
| Hypericum setosum | HAIRY ST.JOHN'S-WORT | Native FACW (NWPL) FACW (DEP) | ||
| Hypericum suffruticosum | PINELAND ST.JOHN'S-WORT | Native FACW (DEP) | ||
| Hypericum tenuifolium | ATLANTIC ST.JOHN'S-WORT | Native FACU (NWPL) | ||
| Hypericum tetrapetalum | FOURPETAL ST.JOHN'S-WORT | Native OBL (NWPL) AD (WAP) FAC (DEP) | ||
| Hypericum tubulosum | LESSER MARSH ST.JOHN'S-WORT | Native OBL (NWPL) OBL (DEP) | ||
| Hypericum virginicum | VIRGINIA MARSH ST.JOHN'S-WORT | Native OBL (NWPL) OBL (DEP) | ||
| Hypericum walteri | GREATER MARSH ST.JOHN'S-WORT | Native OBL (NWPL) OBL (DEP) |
Identification Key
1. Corolla pink, sometimes greenish; stamens 9, in 3 fascicles alternating with staminode fascicles
2
1. Corolla yellow; stamens >9, in 3-5 fascicles or in an continuous or interrupted ring without staminode fascicles
4
2. Petioles conspicuous, 2-15 mm long
2. Petioles absent or inconspicuous, <2 mm long
3
3. Leaf blade with intramarginal gland-dots only
3. Leaf blade with gland-dots on the surface and intramarginally
4. Sepals and petals 4, rarely 5
5
4. Sepals and petals 5, rarely 4
10
5. Styles 2
6
5. Styles 3-4
7
6. Larger leaves >1 cm long, with gland-like auricles at the base; bracteoles near the calyx base; pedicels short, erect at anthesis
6. Larger leaves <1 cm long, without gland-like auricles; bracteoles near the pedicel base; pedicels elongated, reflexed at anthesis
7. Sepals not enclosing the capsule, subequal with the outer ones only slightly larger than the inner ones
7. Sepals enclosing the capsule, unequal with the outer ones much larger than the inner ones
8
8. Outer sepals 9-18 mm wide, conspicuously 5-9-veined
8. Outer sepals 5-10 mm wide, obscurely 3-5-veined
9
9. Leaves subcordate to cordate-clasping
9. Leaves cuneate to truncate at the base
10. Leaves 1-4 mm long
11
10. Larger leaves >5 mm long
12
11. Plant with several, short non-flowering leafy branches
11. Plant lacking short, non-flowering leafy branches
12. Leaves acicular (needle-like), 0.5-1.5 mm wide
13
12. Leaves with an expanded, flat blade, sometimes linear but not acicular, 0.5-25 mm wide
19
13. Largest leaves <12 mm long
14
13. Largest leaves >13 mm long
15
14. Stem internodes sometimes 4-lined at first, soon 2-winged, not terete; leaf surface glossy; capsules 3.5-5.5 mm long; of hydric to mesic habitats
14. Stem internodes 6-lined at first, becoming 4-lined, then terete; leaf surface dull; capsules 6-10 mm long; of xeric habitats
15. Plant <1 m tall, with few branches and a narrow crown
15. Plant >1 m tall with many branches
16
16. Bark smooth and metallic-silvery, exfoliating in thin, curled plates; young stems, leaves, and sepals glaucous
16. Bark not smooth, not metallic-silvery; plant not glaucous
17
17. Bark tight, adherent, not exfoliating or only few narrow strips peeling away
17. Bark flaking in papery sheets or plates or wide strips, corky to spongy
18
18. Plants 2-4 m tall, stems and trunk 2.5-15 cm wide at the base of the plant; stem internodes 4-lined at first, soon 4-angled, then terete; terminal inflorescence 1–3-flowered
18. Plants 1-2 m tall, stems and trunk 0.4-2 cm wide at the base of the plant; stem internodes 6-lined at first, soon 2-winged, then terete; terminal inflorescence (3–)7–32-flowered
19. Stems becoming woody, especially towards the base of the plant
20
19. Stems herbaceous, not woody
26
20. Mid-stem leaves ovate-deltoid, subcordate to cordate, somewhat clasping
20. Mid-stem leaves generally elliptic to linear
21
21. Leaves lacking a definite articulation zone at the base
22
21. Leaves with a definite articulation zone, as a minute, narrow, horizontal line or groove between the leaf base and stem
24
22. Leaves stiff, subcoriaceous, not glaucous, usually with fascicles of leaves in the axils
22. Leaves chartaceous, often glaucous below, lacking leaf fascicles in the axils
23
23. Inflorescences terminal, (1–)3–5(–8)-flowered; sepals tardily deciduous, 1.5–2.3 mm wide; capsules 6–15 × 4.5–8 mm
23. Inflorescences from 1–3 nodes, the terminal 7–45-flowered; sepals deciduous, 1–1.5 mm wide; capsules 3.5–7 × 3–5 mm
24. Inflorescence usually with 1-3 flowers; petals 12-25 mm long
24. Inflorescence usually with 3-25 flowers; petals 5-15 mm long
25
25. Leaf blades 15–32(–37) mm long; flowers 9–14 mm wide; capsules 4.5–6 mm long; seeds 0.7–0.8 mm long
25. Leaf blades 30–70 mm long; flowers 15–30 mm wide; capsules 7–13 mm long; seeds 1.5–2 mm long
26. Leaves linear-subulate; inflorescence racemose
26. Leaves linear to obovate; inflorescence cymose
27
27. Stem and leaves scabrous-tomentose to pilose; sepal margin setulose-ciliate
27. Stems and leaves glabrate; sepal margin not ciliate
28
28. Leaves, sepals, and/or petals with black punctae
29
28. Leaves, sepals, and petals without black punctae
30
29. Petals 6-14 mm long; anther glands amber or pellucid; styles 5-8 mm long
29. Petals 3-6 mm long; anther glands black; styles 1-4 mm long
30. Leaf blades leathery; petals golden yellow or orange-yellow; stamens (35–)50–80
31
30. Leaf blades papery to membranous; petals usually bright, golden, or pale yellow, rarely salmon-orange; stamens 5–25
32
31. Plant unbranched or sparingly branched in the upper nodes; seeds 0.6-0.8 mm long; of dry upland sites
31. Plant with numerous branches at the middle and upper nodes; seeds 0.5-0.6 mm long; of seasonally inundated sites
32. Leaves linear to linear-oblanceolate, 1(3)-nerved
32. Leaves ovate, deltoid-ovate, to elliptic, (3)5-7-nerved
33
33. Upper and mid-stem leaves deltoid-ovate, the apex usually acute
33. Upper and mid-stem leaves ovate-oblong to elliptic, the apex rounded to obtuse
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| Adenosepalum | Adenosepalum (Spach) Fourreau, Ann. Soc. Linn. Lyon, ser. 2. 16: 352. 1868. | BASIONYM: Unknown. | TYPE: Non designatus. |
| Adenotrias | Adenotrias Jaubert & Spach, Ill. Pl. Orient. 1: 76, t. 39. 1842. | TYPE: Non designatus. | |
| Ancistrolobus | Ancistrolobus Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 352. 1836. | TYPE: Ancistrolobus ligustrinus Spach, nom. illegit. (Hypericum biflorum Lamarck) | |
| Androsaemum | Androsaemum Duhamel du Monceau, Traite Arbr. Arbust. 1: 53. 1755. | TYPE: Non designatus. | |
| Ascyrum | Ascyrum Miller, Gard. Dict. Abr., ed. 4. 1754, non Linnaeus 1753. | TYPE: Non designatus. | |
| Ascyrum | Ascyrum Linnaeus, Sp. Pl. 787. 1753. | TYPE: Ascyrum hypericoides Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 528. 1913. | |
| Brathydium | Brathydium Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 365. 1836. | TYPE: Non designatus. | |
| Brathys | Brathys Linnaeus f., Suppl. Pl. 43, 268. 1782 ("1781"). | TYPE: Brathys juniperina Linnaeus f. | |
| Campylopelma | Campylopelma Reichenbach, Handb. Nat. Pfl.-Syst. 307. 1837. | TYPE: Campylopus cerastoides Spach Substitute name form Campylopus Spach 1836, non Bridel 1818, nec Wahlenberg 1826. | |
| Campylopus | Campylopus Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 360. 1836, non Bridel 1818, nec Wahlenberg 1826. | TYPE: Campylopus cerastoides Spach = Campylopelma Reichenbach 1837. | |
| Campylosporus | Campylosporus Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 363. 1836. | TYPE: Non designatus. | |
| Crookea | Crookea Small, Fl. S.E. U.S. 786, 1335. 1903. | TYPE: Crookea microsepala (Torrey & A. Gray) Small (Ascyrum microsepalum Torrey & A. Gray) | |
| Drosanthe | Drosanthe Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 355. 1836. | TYPE: Non designatus. | |
| Drosocarpium | Drosocarpium (Spach) Fourreau, Ann. Soc. Linn. Lyon, ser. 2. 16: 353. 1868. | BASIONYM: Unknown | TYPE: Drosocarpium fimbriatum (Lamarck) Fourreau (Hypericum fimbriatum Lamarck) |
| Elodes | Elodes Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 171. 1836, non Adanson 1763. | TYPE: Elodes palustris Spach (Hypericum elodes Hudson) = Spachelodes Kimura 1935. | |
| Elodes | Elodes Adanson, Fam. Pl. 2: 444. 1763. | TYPE: Elodes aegyptiaca Payer, nom. illegit. (Hypericum aegypticum Linnaeus) | |
| Episiphis | Episiphis Rafinesque, Fl. Tellur. 3: 78. 1837 ("1836"). | TYPE: Episiphis parvifolia Rafinesque, nom. illegit. (Hypericum aegypticum Linnaeus) = Elodes Adanson 1763. | |
| Eremanthe | Eremanthe Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 363. 1836. | TYPE: Eremanthe calycina (Linnaeus) Spcah (Hypericum calycinum Linnaeus) | |
| Eremosporus | Eremosporus Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 355. 1836. | TYPE: Eremosporus olivieri Spach | |
| Gardenia | Gardenia J. Colden, Essays Observ. Phys. Lit. Soc. Edinburgh 2: 2. 1756, nom. rej. vs. Gardenia J. Ellis 1761. | TYPE: Not designated. | |
| Holosepalum | Holosepalum (Spach) Fourreau, Ann. Soc. Linn. Lyon, ser. 2. 16: 352. 1868. | BASIONYM: Unknown | TYPE: Holosepalum dubium (Leers) Fourreau (Hypericum dubium Leers) |
| Huebneria | Huebneria Reichenbach, Det. Bot. Herb.-Buch, Index 232. 1841. | TYPE: = Webbia Spach 1836. | |
| Hypericoides | Hypericoides Adanson, Fam. Pl. 2: 443. 1763. | TYPE: = Ascyrum Linnaeus 1753. | |
| Isophyllum | Isophyllum Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 367. 1836, non Hoffmann 1814. | TYPE: Isophyllum drummondii Spach | |
| Knifa | Knifa Adanson, Fam. Pl. 2: 444. 1763. | TYPE: Non designatus. | |
| Komana | Komana Adanson, Fam. Pl. 2: 444. 1763. | TYPE: Hypericum chinense Linnaeus | |
| Martia | Martia Sprengel, Anleit. Kenntn. Gew., ed. 2. 2(2): 788. 1818. | TYPE: = Elodes Adanson 1763. | |
| Myriandra | Myriandra Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 364. 1836. | TYPE: Non designatus. | |
| Norysca | Norysca Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 363. 1836. | TYPE: Norysca chinensis (Linnaeus) Spach (Hypericum chinense Linnaeus) = Komana Adanson 1763. | |
| Olympia | Olympia Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 359. 1836. | TYPE: Olympia glauca Spach, nom. illegit. (Hypericum olympicum Linnaeus) | |
| Petalanisia | Petalanisia Rafinesque, Fl. Tellur. 3: 80. 1837 ("1836"). | TYPE: Non designatus. | |
| Pleurenodon | Pleurenodon Rafinesque, Fl. Tellur. 3: 80. 1836 ("1836"). | TYPE: Non designatus. | |
| Psorophytum | Psorophytum Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 360. 1836. | TYPE: Psorophytum undulatum Spach, nom. illegit. (Hypericum balearicum Linnaeus) | |
| Receveura | Receveura Vellozo, Fl. Flumin. 237. 1829 ("1825"). | TYPE: Non designatus. | |
| Roscyna | Roscyna Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 364. 1836. | TYPE: Non designatus. | |
| Sanidophyllum | Sanidophyllum Small, Bull. Torrey Bot. Club 51: 391. 1924. | TYPE: Sanidophyllum cumulicola Small | |
| Sarothra | Sarothra Linnaeus, Sp. Pl. 272. 1753. | TYPE: Sarothra gentianoides Linnaeus 1753. | |
| Spachelodes | Spachelodes Kimura, J. Jap. Bot. 11: 832. 1935. | TYPE: Spachelodes elodes (Hudson) Kimura (Hypericum elodes Hudson) Substitute name for Elodes Spach 1836, non Adanson 1763. | |
| Streptalon | Streptalon Rafinesque, Fl. Tellur. 3: 80. 1837 ("1836"). | TYPE: Streptalon dolabriforme (Ventenat) Rafinesque (Hypericum dolabriforme Ventenat) | |
| Thymopsis | Thymopsis Jaubert & Spach, Ill. Pl. Orient. 1: 72, t. 37. 1842, nom. rej. vs. Thymopsis Bentham 1873. | TYPE: Thymopsis aspera Jaubert & Spach | |
| Triadenia | Triadenia Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 172. 1836. | TYPE: = Elodes Adanson 1763. | |
| Triadenum | Triadenum Rafinesque, Fl. Tellur. 3: 78. 1837 ("1836"). | TYPE: Triadenum virginicum (Linnaeus) Rafinesque 1837. (Hypericum virginicum Linnaeus 1759.) | |
| Tripentas | Tripentas Caspary, Monatsber. Koenigl. Preuss. Akad. Wiss. Berlin 1857: 43. 1857. | TYPE: = Elodes Adanson 1763. | |
| Webbia | Webbia Spach, Ann. Sci. Nat., Bot., ser. 2. 5: 356. 1836. | TYPE: Non designatus. |