| Section 6 » Order Theales » Family Hypericaceae |
Show/Hide Synonym
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| Hypericum tenuifolium | = | Hypericum reductum | Godfrey and Wooten (1979, 1981) | | | Hypericum tenuifolium | = | Hypericum reductum | Kartesz (1999) | | | Hypericum tenuifolium | = | Hypericum reductum | Radford, Ahles, and Bell (1968) | | | Hypericum tenuifolium | = | Hypericum reductum | Stevens in Kubitzki, Bayer, & Stevens (2007). Key based in part on Adams (1973), Godfrey (1988), C, and GW. {add for FL: Hyperi | | | Hypericum tenuifolium | = | Hypericum reductum | Stevens in Kubitzki, Bayer, & Stevens (2007). Key based in part on Adams (1973), Godfrey (1988), C, and GW. {add for FL: Hyperi | | | Hypericum tenuifolium | = | Hypericum reductum | Stevens in Kubitzki, Bayer, & Stevens (2007). Key based in part on Adams (1973), Godfrey (1988), C, and GW. {add for FL: Hyperi | | | Hypericum tenuifolium | < | Hypericum aspalathoides | Small (1933, 1938) | (also including H. brachyphyllum) | | Source: Weakley's Flora |
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| Author | Pursh | |
| Distribution | Found throughout the southeastern 45% of the Coastal Plain, but not reaching west to the Sandhills region. Found north to Craven and Wayne counties, and west to the flat portion of Cumberland County.
This is a strictly lower Coastal Plain species, ranging north to southeastern NC and south to southern FL; it ranges west to southern MS. | |
| Abundance | Fairly common to locally common, though likely scarce and local in the northernmost counties. | |
| Habitat | This is a species of sandy pinelands, and it can be found from drier habitats such as Sand Barrens and Xeric Sandhill Scrub, to slightly moist sites such as pine flatwoods (but normally not in savannas). In general, it inhabits drier sites than the very similar Hypericum species 2, though the species have been found in close proximity in some places in the state. | |
| Phenology | Blooms from June to September. | |
| Identification | This is a low, somewhat decumbent shrub, growing only to about 1 foot tall, with some erect stems. As a result of its low growth, it is widely branched from the base and looks wider than tall, often occurring in clumps. The opposite leaves are needle-like and often in whorls or with many in leaf axils, and leaves are normally less than 1/2-inch long. The many yellow flowers are about 1/2-inch across, making this low plant quite attractive when in bloom. It is most easily separated from the rare H. species 2 by its narrow and pointed capsules that are 6-9 mm long (close to 1/3-inch long); the latter has short ovoid capsules only 3-4.5 mm long. | |
| Taxonomic Comments | This species was, until recently, named as H. reductum. Recent references (such as Weakley 2018) have renamed the species as H. tenuifolium.
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| Other Common Name(s) | Sandhill St. John’s-wort, Scrub St. John’s-wort. This plant has gone with two or three common names, almost equally. Considering the dozens of species of Hypericum found in the Southeastern Coastal Plain region, none of these three common names rules out most or all others. | |
| State Rank | S4 | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | FACU link |
| USACE-emp | FACU link |
