Hypericum lloydii |
Hypericum hypericoides |
|||||
---|---|---|---|---|---|---|
sandhill St. Johnswort |
St. Andrew's cross |
|||||
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Subshrubs or shrubs, erect or decumbent to prostrate, unbranched or branched, sometimes diffuse and mat-forming, 0.5–3 or 3–15 dm. | ||||
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes 2-winged. |
||||
Leaf | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
blades oblanceolate or narrowly oblong or elliptic to linear, 7–25 × 1–8.5 mm, base not articulated, usually cuneate, sometimes rounded, with glandlike auricles, margins subrecurved, apex rounded to obtuse, midrib with 1–2 pairs of branches. |
||||
Inflorescences | narrowly pyramidal, 1–3-flowered, with 1–3(–5)-flowered dichasia from to 5 proximal nodes, without additional flowering branches; pedicels 0.5 mm. |
narrowly cylindric to pyramidal, 1–12-flowered from 1–4 nodes, sometimes with branches from to 10 proximal nodes, or branching more elaborate and pseudodichotomous; pedicels erect in fruit, bracteoles distal. |
||||
Flowers | 12–14 mm diam.; sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–7 × 0.5–0.8 mm; petals 5, golden yellow, oblanceolate-oblong, 5–7.5 mm; stamens deciduous, 100; ovary 3-merous. |
10–20 mm diam.; sepals persistent, enclosing capsule, 4, unequal, outer ovate-suborbiculate to narrowly elliptic, 5–12.5 × 2–13 mm, apex subapiculate to obtuse, inner lanceolate, 1–4 × 2 mm, apex acute; petals 4, bright to pale yellow, obovate to narrowly oblong-elliptic, 6–12 mm; stamens persistent, 40–50; ovary 2-merous. |
||||
Capsules | ovoid, 3–4 × 2–2.5 mm. |
narrowly compressed-ovoid to cylindric-ellipsoid, 5–9 × 2–4 mm. |
||||
Seeds | carinate, 0.7 mm; testa not seen. |
not carinate, 0.6–0.8 mm; testa finely linear-reticulate to linear-foveolate. |
||||
Hypericum lloydii |
Hypericum hypericoides |
|||||
Phenology | Flowering summer (Aug). | |||||
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | |||||
Elevation | 100–300 m (300–1000 ft) | |||||
Distribution |
AL; GA; NC; SC
|
AL; AR; DC; DE; FL; GA; IL; IN; KS; KY; LA; MA; MD; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; WV; Mexico; West Indies (Bahamas, Greater Antilles); Bermuda; Central America (Guatemala, Honduras)
|
||||
Discussion | The habit, leaf shape, and drier habitats distinguish Hypericum lloydii from H. galioides. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 3 (2 in the flora). Hypericum hypericoides can be distinguished from H. crux-andreae by the two-merous ovary, narrower leaves, smaller flowers, and more richly-branched stems. It is variable in leaf and sepal shape and size; three subspecies can be recognized. The erect bushy form (subsp. hypericoides) is most widespread and has given rise to a northern diffuse form (subsp. multicaule) in the United States and a prostrate form (subsp. prostratum N. Robson) in Hispaniola. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 87. | ||||
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Myriandra | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | H. galioides var. lloydii | Ascyrum hypericoides | ||||
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | (Linnaeus) Crantz: Inst. Rei Herb. 2: 520. (1766) | ||||
Web links |